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<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><meta name=description content="A way to create simple reusable template components in Django."><link href=https://django-components.github.io/django-components/latest/getting_started/adding_slots/ rel=canonical><link href=../parametrising_components/ rel=prev><link href=../../concepts/fundamentals/single_file_components/ rel=next><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.6.1, mkdocs-material-9.5.50"><title>Adding slots - Django-Components</title><link rel=stylesheet href=../../assets/stylesheets/main.a40c8224.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.06af60db.min.css><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link rel=stylesheet 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data-md-component=header-title> <div class=md-header__ellipsis> <div class=md-header__topic> <span class=md-ellipsis> Django-Components </span> </div> <div class=md-header__topic data-md-component=header-topic> <span class=md-ellipsis> Adding slots </span> </div> </div> </div> <form class=md-header__option data-md-component=palette> <input class=md-option data-md-color-media=(prefers-color-scheme) data-md-color-scheme=default data-md-color-primary=indigo data-md-color-accent=indigo aria-label="Switch to light mode" type=radio name=__palette id=__palette_0> <label class="md-header__button md-icon" title="Switch to light mode" for=__palette_1 hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="m14.3 16-.7-2h-3.2l-.7 2H7.8L11 7h2l3.2 9zM20 8.69V4h-4.69L12 .69 8.69 4H4v4.69L.69 12 4 15.31V20h4.69L12 23.31 15.31 20H20v-4.69L23.31 12zm-9.15 3.96h2.3L12 9z"/></svg> </label> <input class=md-option data-md-color-media="(prefers-color-scheme: light)" 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244.8 8M97.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1m-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7m32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1m-11.4-14.7c-1.6 1-1.6 3.6 0 5.9s4.3 3.3 5.6 2.3c1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2"/></svg> </div> <div class=md-source__repository> django-components/django-components </div> </a> </div> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_1> <label class=md-nav__link for=__nav_1 id=__nav_1_label tabindex=0> <span class=md-ellipsis> Overview </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_1_label aria-expanded=false> <label class=md-nav__title for=__nav_1> <span class="md-nav__icon md-icon"></span> Overview </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../overview/welcome/ class=md-nav__link> <span class=md-ellipsis> Welcome to Django Components </span> </a> </li> <li class=md-nav__item> <a href=../../overview/compatibility/ class=md-nav__link> <span class=md-ellipsis> Compatibility </span> </a> </li> <li class=md-nav__item> <a href=../../overview/installation/ class=md-nav__link> <span class=md-ellipsis> Installation </span> </a> </li> <li class=md-nav__item> <a href=../../overview/security_notes/ class=md-nav__link> <span class=md-ellipsis> Security notes 🚨 </span> </a> </li> <li class=md-nav__item> <a href=../../overview/community/ class=md-nav__link> <span class=md-ellipsis> Community </span> </a> </li> <li class=md-nav__item> <a href=../../overview/contributing/ class=md-nav__link> <span class=md-ellipsis> Contributing </span> </a> </li> <li class=md-nav__item> <a href=../../overview/development/ class=md-nav__link> <span class=md-ellipsis> Development </span> </a> </li> <li class=md-nav__item> <a href=../../overview/code_of_conduct/ class=md-nav__link> <span class=md-ellipsis> Code of Conduct </span> </a> </li> <li class=md-nav__item> <a href=../../overview/license/ class=md-nav__link> <span class=md-ellipsis> License </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_2 checked> <label class=md-nav__link for=__nav_2 id=__nav_2_label tabindex> <span class=md-ellipsis> Getting Started </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_2_label aria-expanded=true> <label class=md-nav__title for=__nav_2> <span class="md-nav__icon md-icon"></span> Getting Started </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../your_first_component/ class=md-nav__link> <span class=md-ellipsis> Create your first component </span> </a> </li> <li class=md-nav__item> <a href=../adding_js_and_css/ class=md-nav__link> <span class=md-ellipsis> Adding JS and CSS </span> </a> </li> <li class=md-nav__item> <a href=../components_in_templates/ class=md-nav__link> <span class=md-ellipsis> Components in templates </span> </a> </li> <li class=md-nav__item> <a href=../parametrising_components/ class=md-nav__link> <span class=md-ellipsis> Parametrising components </span> </a> </li> <li class="md-nav__item md-nav__item--active"> <input class="md-nav__toggle md-toggle" type=checkbox id=__toc> <label class="md-nav__link md-nav__link--active" for=__toc> <span class=md-ellipsis> Adding slots </span> <span class="md-nav__icon md-icon"></span> </label> <a href=./ class="md-nav__link md-nav__link--active"> <span class=md-ellipsis> Adding slots </span> </a> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#1-what-are-slots class=md-nav__link> <span class=md-ellipsis> 1. What are slots </span> </a> </li> <li class=md-nav__item> <a href=#2-add-a-slot-tag class=md-nav__link> <span class=md-ellipsis> 2. Add a slot tag </span> </a> </li> <li class=md-nav__item> <a href=#3-add-fill-tag class=md-nav__link> <span class=md-ellipsis> 3. Add fill tag </span> </a> </li> <li class=md-nav__item> <a href=#5-wait-theres-a-bug class=md-nav__link> <span class=md-ellipsis> 5. Wait, there's a bug </span> </a> </li> <li class=md-nav__item> <a href=#5-adding-data-to-slots class=md-nav__link> <span class=md-ellipsis> 5. Adding data to slots </span> </a> </li> <li class=md-nav__item> <a href=#6-accessing-slot-data-in-fills class=md-nav__link> <span class=md-ellipsis> 6. Accessing slot data in fills </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_3> <label class=md-nav__link for=__nav_3 id=__nav_3_label tabindex=0> <span class=md-ellipsis> Concepts </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_3_label aria-expanded=false> <label class=md-nav__title for=__nav_3> <span class="md-nav__icon md-icon"></span> Concepts </label> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_3_1> <label class=md-nav__link for=__nav_3_1 id=__nav_3_1_label tabindex=0> <span class=md-ellipsis> Fundamentals </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_3_1_label aria-expanded=false> <label class=md-nav__title for=__nav_3_1> <span class="md-nav__icon md-icon"></span> Fundamentals </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../concepts/fundamentals/single_file_components/ class=md-nav__link> <span class=md-ellipsis> Single-file components </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/components_in_python/ class=md-nav__link> <span class=md-ellipsis> Components in Python </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/access_component_input/ class=md-nav__link> <span class=md-ellipsis> Accessing component inputs </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/component_context_scope/ class=md-nav__link> <span class=md-ellipsis> Component context and scope </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/template_tag_syntax/ class=md-nav__link> <span class=md-ellipsis> Template tag syntax </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/slots/ class=md-nav__link> <span class=md-ellipsis> Slots </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/html_attributes/ class=md-nav__link> <span class=md-ellipsis> HTML attributes </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/defining_js_css_html_files/ class=md-nav__link> <span class=md-ellipsis> Defining HTML / JS / CSS files </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/autodiscovery/ class=md-nav__link> <span class=md-ellipsis> Autodiscovery </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/components_as_views/ class=md-nav__link> <span class=md-ellipsis> Components as views </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/fundamentals/subclassing_components/ class=md-nav__link> <span class=md-ellipsis> Subclassing components </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_3_2> <label class=md-nav__link for=__nav_3_2 id=__nav_3_2_label tabindex=0> <span class=md-ellipsis> Advanced </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_3_2_label aria-expanded=false> <label class=md-nav__title for=__nav_3_2> <span class="md-nav__icon md-icon"></span> Advanced </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../concepts/advanced/rendering_js_css/ class=md-nav__link> <span class=md-ellipsis> Rendering JS / CSS </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/html_tragments/ class=md-nav__link> <span class=md-ellipsis> HTML fragments </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/provide_inject/ class=md-nav__link> <span class=md-ellipsis> Prop drilling and provide / inject </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/hooks/ class=md-nav__link> <span class=md-ellipsis> Lifecycle hooks </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/component_registry/ class=md-nav__link> <span class=md-ellipsis> Registering components </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/typing_and_validation/ class=md-nav__link> <span class=md-ellipsis> Typing and validation </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/template_tags/ class=md-nav__link> <span class=md-ellipsis> Custom template tags </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/tag_formatter/ class=md-nav__link> <span class=md-ellipsis> Tag formatters </span> </a> </li> <li class=md-nav__item> <a href=../../concepts/advanced/authoring_component_libraries/ class=md-nav__link> <span class=md-ellipsis> Authoring component libraries </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_4> <label class=md-nav__link for=__nav_4 id=__nav_4_label tabindex=0> <span class=md-ellipsis> Guides </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_4_label aria-expanded=false> <label class=md-nav__title for=__nav_4> <span class="md-nav__icon md-icon"></span> Guides </label> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_4_1> <label class=md-nav__link for=__nav_4_1 id=__nav_4_1_label tabindex=0> <span class=md-ellipsis> Setup </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_1_label aria-expanded=false> <label class=md-nav__title for=__nav_4_1> <span class="md-nav__icon md-icon"></span> Setup </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../guides/setup/syntax_highlight/ class=md-nav__link> <span class=md-ellipsis> Syntax highlighting </span> </a> </li> <li class=md-nav__item> <a href=../../guides/setup/dev_server_setup/ class=md-nav__link> <span class=md-ellipsis> Running with development server </span> </a> </li> <li class=md-nav__item> <a href=../../guides/setup/logging_and_debugging/ class=md-nav__link> <span class=md-ellipsis> Logging and debugging </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_4_2> <label class=md-nav__link for=__nav_4_2 id=__nav_4_2_label tabindex=0> <span class=md-ellipsis> Dev guides </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_2_label aria-expanded=false> <label class=md-nav__title for=__nav_4_2> <span class="md-nav__icon md-icon"></span> Dev guides </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../guides/devguides/dependency_mgmt/ class=md-nav__link> <span class=md-ellipsis> JS and CSS rendering </span> </a> </li> <li class=md-nav__item> <a href=../../guides/devguides/slot_rendering/ class=md-nav__link> <span class=md-ellipsis> Slot rendering </span> </a> </li> <li class=md-nav__item> <a href=../../guides/devguides/slots_and_blocks/ class=md-nav__link> <span class=md-ellipsis> Using slot and block tags </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--nested"> <input class="md-nav__toggle md-toggle md-toggle--indeterminate" type=checkbox id=__nav_5> <label class=md-nav__link for=__nav_5 id=__nav_5_label tabindex=0> <span class=md-ellipsis> API Documentation </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_5_label aria-expanded=false> <label class=md-nav__title for=__nav_5> <span class="md-nav__icon md-icon"></span> API Documentation </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../reference/api/ class=md-nav__link> <span class=md-ellipsis> Api </span> </a> </li> <li class=md-nav__item> <a href=../../reference/commands/ class=md-nav__link> <span class=md-ellipsis> Commands </span> </a> </li> <li class=md-nav__item> <a href=../../reference/components/ class=md-nav__link> <span class=md-ellipsis> Components </span> </a> </li> <li class=md-nav__item> <a href=../../reference/exceptions/ class=md-nav__link> <span class=md-ellipsis> Exceptions </span> </a> </li> <li class=md-nav__item> <a href=../../reference/middlewares/ class=md-nav__link> <span class=md-ellipsis> Middlewares </span> </a> </li> <li class=md-nav__item> <a href=../../reference/settings/ class=md-nav__link> <span class=md-ellipsis> Settings </span> </a> </li> <li class=md-nav__item> <a href=../../reference/tag_formatters/ class=md-nav__link> <span class=md-ellipsis> Tag formatters </span> </a> </li> <li class=md-nav__item> <a href=../../reference/template_tags/ class=md-nav__link> <span class=md-ellipsis> Template tags </span> </a> </li> <li class=md-nav__item> <a href=../../reference/template_vars/ class=md-nav__link> <span class=md-ellipsis> Template vars </span> </a> </li> <li class=md-nav__item> <a href=../../reference/urls/ class=md-nav__link> <span class=md-ellipsis> Urls </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../../release_notes/ class=md-nav__link> <span class=md-ellipsis> Release notes </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=sidebar data-md-type=toc> <div class=md-sidebar__scrollwrap> <div class=md-sidebar__inner> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#1-what-are-slots class=md-nav__link> <span class=md-ellipsis> 1. What are slots </span> </a> </li> <li class=md-nav__item> <a href=#2-add-a-slot-tag class=md-nav__link> <span class=md-ellipsis> 2. Add a slot tag </span> </a> </li> <li class=md-nav__item> <a href=#3-add-fill-tag class=md-nav__link> <span class=md-ellipsis> 3. Add fill tag </span> </a> </li> <li class=md-nav__item> <a href=#5-wait-theres-a-bug class=md-nav__link> <span class=md-ellipsis> 5. Wait, there's a bug </span> </a> </li> <li class=md-nav__item> <a href=#5-adding-data-to-slots class=md-nav__link> <span class=md-ellipsis> 5. Adding data to slots </span> </a> </li> <li class=md-nav__item> <a href=#6-accessing-slot-data-in-fills class=md-nav__link> <span class=md-ellipsis> 6. Accessing slot data in fills </span> </a> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <a href=https://github.com/django-components/django-components/edit/master/docs/getting_started/adding_slots.md title="Edit this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4zm10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1z"/></svg> </a> <a href=https://github.com/django-components/django-components/raw/master/docs/getting_started/adding_slots.md title="View source of this page" class="md-content__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M17 18c.56 0 1 .44 1 1s-.44 1-1 1-1-.44-1-1 .44-1 1-1m0-3c-2.73 0-5.06 1.66-6 4 .94 2.34 3.27 4 6 4s5.06-1.66 6-4c-.94-2.34-3.27-4-6-4m0 6.5a2.5 2.5 0 0 1-2.5-2.5 2.5 2.5 0 0 1 2.5-2.5 2.5 2.5 0 0 1 2.5 2.5 2.5 2.5 0 0 1-2.5 2.5M9.27 20H6V4h7v5h5v4.07c.7.08 1.36.25 2 .49V8l-6-6H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h4.5a8.2 8.2 0 0 1-1.23-2"/></svg> </a> <h1>Adding slots</h1> <p>Our calendar component's looking great! But we just got a new assignment from our colleague - The calendar date needs to be shown on 3 different pages:</p> <ol> <li>On one page, it needs to be shown as is</li> <li>On the second, the date needs to be <strong>bold</strong></li> <li>On the third, the date needs to be in <em>italics</em></li> </ol> <p>As a reminder, this is what the component's template looks like:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-0-1 name=__codelineno-0-1 href=#__codelineno-0-1></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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<a id=__codelineno-0-2 name=__codelineno-0-2 href=#__codelineno-0-2></a> Today's date is <span class=p><</span><span class=nt>span</span><span class=p>></span><span class=cp>{{</span> <span class=nv>date</span> <span class=cp>}}</span><span class=p></</span><span class=nt>span</span><span class=p>></span>
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<a id=__codelineno-0-3 name=__codelineno-0-3 href=#__codelineno-0-3></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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</code></pre></div> <p>There's many ways we could approach this:</p> <ul> <li>Expose the date in a slot</li> <li>Style <code>.calendar > span</code> differently on different pages</li> <li>Pass a variable to the component that decides how the date is rendered</li> <li>Create a new component</li> </ul> <p>First two options are more flexible, because the custom styling is not baked into a component's implementation. And for the sake of demonstration, we'll solve this challenge with slots.</p> <h3 id=1-what-are-slots>1. What are slots<a class=headerlink href=#1-what-are-slots title="Permanent link">¤</a></h3> <p>Components support something called <a href=../fundamentals/slots.md>Slots</a>.</p> <p>When a component is used inside another template, slots allow the parent template to override specific parts of the child component by passing in different content.</p> <p>This mechanism makes components more reusable and composable.</p> <p>This behavior is similar to <a href=https://vuejs.org/guide/components/slots.html>slots in Vue</a>.</p> <p>In the example below we introduce two tags that work hand in hand to make this work. These are...</p> <ul> <li><code>{% slot <name> %}</code>/<code>{% endslot %}</code>: Declares a new slot in the component template.</li> <li><code>{% fill <name> %}</code>/<code>{% endfill %}</code>: (Used inside a <a href=../../reference/template_tags.md#component><code>{% component %}</code></a> tag pair.) Fills a declared slot with the specified content.</li> </ul> <h3 id=2-add-a-slot-tag>2. Add a slot tag<a class=headerlink href=#2-add-a-slot-tag title="Permanent link">¤</a></h3> <p>Let's update our calendar component to support more customization. We'll add <a href=../../reference/template_tags.md#slot><code>{% slot %}</code></a> tag to the template:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-1-1 name=__codelineno-1-1 href=#__codelineno-1-1></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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<a id=__codelineno-1-2 name=__codelineno-1-2 href=#__codelineno-1-2></a> Today's date is
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<a id=__codelineno-1-3 name=__codelineno-1-3 href=#__codelineno-1-3></a> <span class=cp>{%</span> <span class=k>slot</span> <span class=s2>"date"</span> <span class=nv>default</span> <span class=cp>%}</span> <span class=c>{# <--- new #}</span>
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<a id=__codelineno-1-4 name=__codelineno-1-4 href=#__codelineno-1-4></a> <span class=p><</span><span class=nt>span</span><span class=p>></span><span class=cp>{{</span> <span class=nv>date</span> <span class=cp>}}</span><span class=p></</span><span class=nt>span</span><span class=p>></span>
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<a id=__codelineno-1-5 name=__codelineno-1-5 href=#__codelineno-1-5></a> <span class=cp>{%</span> <span class=k>endslot</span> <span class=cp>%}</span>
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<a id=__codelineno-1-6 name=__codelineno-1-6 href=#__codelineno-1-6></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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</code></pre></div> <p>Notice that:</p> <ol> <li> <p>We named the slot <code>date</code> - so we can fill this slot by using <code>{% fill "date" %}</code></p> </li> <li> <p>We also made it the <a href=../fundamentals/slots.md#default-slot>default slot</a>.</p> </li> <li> <p>We placed our original implementation inside the <a href=../../reference/template_tags.md#slot><code>{% slot %}</code></a> tag - this is what will be rendered when the slot is NOT overriden.</p> </li> </ol> <h3 id=3-add-fill-tag>3. Add fill tag<a class=headerlink href=#3-add-fill-tag title="Permanent link">¤</a></h3> <p>Now we can use <a href=../../reference/template_tags.md#fill><code>{% fill %}</code></a> tags inside the <a href=../../reference/template_tags.md#component><code>{% component %}</code></a> tags to override the <code>date</code> slot to generate the bold and italics variants:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-2-1 name=__codelineno-2-1 href=#__codelineno-2-1></a><span class=c>{# Default #}</span>
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<a id=__codelineno-2-2 name=__codelineno-2-2 href=#__codelineno-2-2></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=o>/</span> <span class=cp>%}</span>
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<a id=__codelineno-2-3 name=__codelineno-2-3 href=#__codelineno-2-3></a>
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<a id=__codelineno-2-4 name=__codelineno-2-4 href=#__codelineno-2-4></a><span class=c>{# Bold #}</span>
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<a id=__codelineno-2-5 name=__codelineno-2-5 href=#__codelineno-2-5></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
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<a id=__codelineno-2-6 name=__codelineno-2-6 href=#__codelineno-2-6></a> <span class=p><</span><span class=nt>b</span><span class=p>></span> 2024-12-13 <span class=p></</span><span class=nt>b</span><span class=p>></span>
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<a id=__codelineno-2-7 name=__codelineno-2-7 href=#__codelineno-2-7></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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<a id=__codelineno-2-8 name=__codelineno-2-8 href=#__codelineno-2-8></a>
|
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<a id=__codelineno-2-9 name=__codelineno-2-9 href=#__codelineno-2-9></a><span class=c>{# Italics #}</span>
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<a id=__codelineno-2-10 name=__codelineno-2-10 href=#__codelineno-2-10></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
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<a id=__codelineno-2-11 name=__codelineno-2-11 href=#__codelineno-2-11></a> <span class=p><</span><span class=nt>i</span><span class=p>></span> 2024-12-13 <span class=p></</span><span class=nt>i</span><span class=p>></span>
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<a id=__codelineno-2-12 name=__codelineno-2-12 href=#__codelineno-2-12></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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</code></pre></div> <p>Which will render as:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-3-1 name=__codelineno-3-1 href=#__codelineno-3-1></a><span class=cm><!-- Default --></span>
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<a id=__codelineno-3-2 name=__codelineno-3-2 href=#__codelineno-3-2></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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<a id=__codelineno-3-3 name=__codelineno-3-3 href=#__codelineno-3-3></a> Today's date is <span class=p><</span><span class=nt>span</span><span class=p>></span>2024-12-13<span class=p></</span><span class=nt>span</span><span class=p>></span>
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<a id=__codelineno-3-4 name=__codelineno-3-4 href=#__codelineno-3-4></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
|
|
<a id=__codelineno-3-5 name=__codelineno-3-5 href=#__codelineno-3-5></a>
|
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<a id=__codelineno-3-6 name=__codelineno-3-6 href=#__codelineno-3-6></a><span class=cm><!-- Bold --></span>
|
|
<a id=__codelineno-3-7 name=__codelineno-3-7 href=#__codelineno-3-7></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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|
<a id=__codelineno-3-8 name=__codelineno-3-8 href=#__codelineno-3-8></a> Today's date is <span class=p><</span><span class=nt>b</span><span class=p>></span>2024-12-13<span class=p></</span><span class=nt>b</span><span class=p>></span>
|
|
<a id=__codelineno-3-9 name=__codelineno-3-9 href=#__codelineno-3-9></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
|
|
<a id=__codelineno-3-10 name=__codelineno-3-10 href=#__codelineno-3-10></a>
|
|
<a id=__codelineno-3-11 name=__codelineno-3-11 href=#__codelineno-3-11></a><span class=cm><!-- Italics --></span>
|
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<a id=__codelineno-3-12 name=__codelineno-3-12 href=#__codelineno-3-12></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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|
<a id=__codelineno-3-13 name=__codelineno-3-13 href=#__codelineno-3-13></a> Today's date is <span class=p><</span><span class=nt>i</span><span class=p>></span>2024-12-13<span class=p></</span><span class=nt>i</span><span class=p>></span>
|
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<a id=__codelineno-3-14 name=__codelineno-3-14 href=#__codelineno-3-14></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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</code></pre></div> <div class="admonition info"> <p class=admonition-title>Info</p> <p>Since we used the <code>default</code> flag on <code>{% slot "date" %}</code> inside our calendar component, we can target the <code>date</code> component in multiple ways:</p> <ol> <li> <p>Explicitly by it's name <div class=highlight><pre><span></span><code><a id=__codelineno-4-1 name=__codelineno-4-1 href=#__codelineno-4-1></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
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|
<a id=__codelineno-4-2 name=__codelineno-4-2 href=#__codelineno-4-2></a> <span class=cp>{%</span> <span class=k>fill</span> <span class=s2>"date"</span> <span class=cp>%}</span>
|
|
<a id=__codelineno-4-3 name=__codelineno-4-3 href=#__codelineno-4-3></a> <span class=p><</span><span class=nt>i</span><span class=p>></span> 2024-12-13 <span class=p></</span><span class=nt>i</span><span class=p>></span>
|
|
<a id=__codelineno-4-4 name=__codelineno-4-4 href=#__codelineno-4-4></a> <span class=cp>{%</span> <span class=k>endfill</span> <span class=cp>%}</span>
|
|
<a id=__codelineno-4-5 name=__codelineno-4-5 href=#__codelineno-4-5></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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</code></pre></div></p> </li> <li> <p>Implicitly as the <a href=../fundamentals/slots.md#default-slot>default slot</a> (Omitting the <a href=../../reference/template_tags.md#fill><code>{% fill %}</code></a> tag) <div class=highlight><pre><span></span><code><a id=__codelineno-5-1 name=__codelineno-5-1 href=#__codelineno-5-1></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
|
|
<a id=__codelineno-5-2 name=__codelineno-5-2 href=#__codelineno-5-2></a> <span class=p><</span><span class=nt>i</span><span class=p>></span> 2024-12-13 <span class=p></</span><span class=nt>i</span><span class=p>></span>
|
|
<a id=__codelineno-5-3 name=__codelineno-5-3 href=#__codelineno-5-3></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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</code></pre></div></p> </li> <li> <p>Explicitly as the <a href=../fundamentals/slots.md#default-slot>default slot</a> (Setting fill name to <code>default</code>) <div class=highlight><pre><span></span><code><a id=__codelineno-6-1 name=__codelineno-6-1 href=#__codelineno-6-1></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
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<a id=__codelineno-6-2 name=__codelineno-6-2 href=#__codelineno-6-2></a> <span class=cp>{%</span> <span class=k>fill</span> <span class=s2>"default"</span> <span class=cp>%}</span>
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<a id=__codelineno-6-3 name=__codelineno-6-3 href=#__codelineno-6-3></a> <span class=p><</span><span class=nt>i</span><span class=p>></span> 2024-12-13 <span class=p></</span><span class=nt>i</span><span class=p>></span>
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|
<a id=__codelineno-6-4 name=__codelineno-6-4 href=#__codelineno-6-4></a> <span class=cp>{%</span> <span class=k>endfill</span> <span class=cp>%}</span>
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<a id=__codelineno-6-5 name=__codelineno-6-5 href=#__codelineno-6-5></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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</code></pre></div></p> </li> </ol> </div> <h3 id=5-wait-theres-a-bug>5. Wait, there's a bug<a class=headerlink href=#5-wait-theres-a-bug title="Permanent link">¤</a></h3> <p>There is a mistake in our code! <code>2024-12-13</code> is Friday, so that's fine. But if we updated the to <code>2024-12-14</code>, which is Saturday, our template from previous step would render this:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-7-1 name=__codelineno-7-1 href=#__codelineno-7-1></a><span class=cm><!-- Default --></span>
|
|
<a id=__codelineno-7-2 name=__codelineno-7-2 href=#__codelineno-7-2></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
|
|
<a id=__codelineno-7-3 name=__codelineno-7-3 href=#__codelineno-7-3></a> Today's date is <span class=p><</span><span class=nt>span</span><span class=p>></span>2024-12-16<span class=p></</span><span class=nt>span</span><span class=p>></span>
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<a id=__codelineno-7-4 name=__codelineno-7-4 href=#__codelineno-7-4></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
|
|
<a id=__codelineno-7-5 name=__codelineno-7-5 href=#__codelineno-7-5></a>
|
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<a id=__codelineno-7-6 name=__codelineno-7-6 href=#__codelineno-7-6></a><span class=cm><!-- Bold --></span>
|
|
<a id=__codelineno-7-7 name=__codelineno-7-7 href=#__codelineno-7-7></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
|
|
<a id=__codelineno-7-8 name=__codelineno-7-8 href=#__codelineno-7-8></a> Today's date is <span class=p><</span><span class=nt>b</span><span class=p>></span>2024-12-14<span class=p></</span><span class=nt>b</span><span class=p>></span>
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|
<a id=__codelineno-7-9 name=__codelineno-7-9 href=#__codelineno-7-9></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
|
|
<a id=__codelineno-7-10 name=__codelineno-7-10 href=#__codelineno-7-10></a>
|
|
<a id=__codelineno-7-11 name=__codelineno-7-11 href=#__codelineno-7-11></a><span class=cm><!-- Italics --></span>
|
|
<a id=__codelineno-7-12 name=__codelineno-7-12 href=#__codelineno-7-12></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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|
<a id=__codelineno-7-13 name=__codelineno-7-13 href=#__codelineno-7-13></a> Today's date is <span class=p><</span><span class=nt>i</span><span class=p>></span>2024-12-14<span class=p></</span><span class=nt>i</span><span class=p>></span>
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<a id=__codelineno-7-14 name=__codelineno-7-14 href=#__codelineno-7-14></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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</code></pre></div> <p>The first instance rendered <code>2024-12-16</code>, while the rest rendered <code>2024-12-14</code>!</p> <p>Why? Remember that in the <a href=../../../reference/api#django_components.Component.get_context_data><code>get_context_data()</code></a> method of our Calendar component, we pre-process the date. If the date falls on Saturday or Sunday, we shift it to next Monday:</p> <div class=highlight><span class=filename>[project root]/components/calendar/calendar.py</span><pre><span></span><code><a id=__codelineno-8-1 name=__codelineno-8-1 href=#__codelineno-8-1></a><span class=kn>from</span><span class=w> </span><span class=nn>datetime</span><span class=w> </span><span class=kn>import</span> <span class=n>date</span>
|
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<a id=__codelineno-8-2 name=__codelineno-8-2 href=#__codelineno-8-2></a>
|
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<a id=__codelineno-8-3 name=__codelineno-8-3 href=#__codelineno-8-3></a><span class=kn>from</span><span class=w> </span><span class=nn>django_components</span><span class=w> </span><span class=kn>import</span> <span class=n>Component</span><span class=p>,</span> <span class=n>register</span>
|
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<a id=__codelineno-8-4 name=__codelineno-8-4 href=#__codelineno-8-4></a>
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<a id=__codelineno-8-5 name=__codelineno-8-5 href=#__codelineno-8-5></a><span class=c1># If date is Sat or Sun, shift it to next Mon, so the date is always workweek.</span>
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<a id=__codelineno-8-6 name=__codelineno-8-6 href=#__codelineno-8-6></a><span class=k>def</span><span class=w> </span><span class=nf>to_workweek_date</span><span class=p>(</span><span class=n>d</span><span class=p>:</span> <span class=n>date</span><span class=p>):</span>
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<a id=__codelineno-8-7 name=__codelineno-8-7 href=#__codelineno-8-7></a> <span class=o>...</span>
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<a id=__codelineno-8-8 name=__codelineno-8-8 href=#__codelineno-8-8></a>
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<a id=__codelineno-8-9 name=__codelineno-8-9 href=#__codelineno-8-9></a><span class=nd>@register</span><span class=p>(</span><span class=s2>"calendar"</span><span class=p>)</span>
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<a id=__codelineno-8-10 name=__codelineno-8-10 href=#__codelineno-8-10></a><span class=k>class</span><span class=w> </span><span class=nc>Calendar</span><span class=p>(</span><span class=n>Component</span><span class=p>):</span>
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<a id=__codelineno-8-11 name=__codelineno-8-11 href=#__codelineno-8-11></a> <span class=n>template_file</span> <span class=o>=</span> <span class=s2>"calendar.html"</span>
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<a id=__codelineno-8-12 name=__codelineno-8-12 href=#__codelineno-8-12></a> <span class=o>...</span>
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<a id=__codelineno-8-13 name=__codelineno-8-13 href=#__codelineno-8-13></a> <span class=k>def</span><span class=w> </span><span class=nf>get_context_data</span><span class=p>(</span><span class=bp>self</span><span class=p>,</span> <span class=n>date</span><span class=p>:</span> <span class=n>date</span><span class=p>,</span> <span class=n>extra_class</span><span class=p>:</span> <span class=nb>str</span> <span class=o>|</span> <span class=kc>None</span> <span class=o>=</span> <span class=kc>None</span><span class=p>):</span>
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<a id=__codelineno-8-14 name=__codelineno-8-14 href=#__codelineno-8-14></a> <span class=n>workweek_date</span> <span class=o>=</span> <span class=n>to_workweek_date</span><span class=p>(</span><span class=n>date</span><span class=p>)</span>
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<a id=__codelineno-8-15 name=__codelineno-8-15 href=#__codelineno-8-15></a> <span class=k>return</span> <span class=p>{</span>
|
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<a id=__codelineno-8-16 name=__codelineno-8-16 href=#__codelineno-8-16></a> <span class=s2>"date"</span><span class=p>:</span> <span class=n>workweek_date</span><span class=p>,</span>
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<a id=__codelineno-8-17 name=__codelineno-8-17 href=#__codelineno-8-17></a> <span class=s2>"extra_class"</span><span class=p>:</span> <span class=n>extra_class</span><span class=p>,</span>
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<a id=__codelineno-8-18 name=__codelineno-8-18 href=#__codelineno-8-18></a> <span class=p>}</span>
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</code></pre></div> <p>And the issue is that in our template, we used the <code>date</code> value that we used <em>as input</em>, which is NOT the same as the <code>date</code> variable used inside Calendar's template.</p> <h3 id=5-adding-data-to-slots>5. Adding data to slots<a class=headerlink href=#5-adding-data-to-slots title="Permanent link">¤</a></h3> <p>We want to use the same <code>date</code> variable that's used inside Calendar's template.</p> <p>Luckily, django-components allows passing data to the slot, also known as <a href=../fundamentals/slots.md#scoped-slots>Scoped slots</a>.</p> <p>This consists of two steps:</p> <ol> <li>Pass the <code>date</code> variable to the <a href=../../reference/template_tags.md#slot><code>{% slot %}</code></a> tag</li> <li>Access the <code>date</code> variable in the <a href=../../reference/template_tags.md#fill><code>{% fill %}</code></a> tag by using the special <code>data</code> kwarg</li> </ol> <p>Let's update the Calendar's template:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-9-1 name=__codelineno-9-1 href=#__codelineno-9-1></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
|
|
<a id=__codelineno-9-2 name=__codelineno-9-2 href=#__codelineno-9-2></a> Today's date is
|
|
<a id=__codelineno-9-3 name=__codelineno-9-3 href=#__codelineno-9-3></a> <span class=cp>{%</span> <span class=k>slot</span> <span class=s2>"date"</span> <span class=nv>default</span> <span class=nv>date</span><span class=o>=</span><span class=nv>date</span> <span class=cp>%}</span> <span class=c>{# <--- changed #}</span>
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<a id=__codelineno-9-4 name=__codelineno-9-4 href=#__codelineno-9-4></a> <span class=p><</span><span class=nt>span</span><span class=p>></span><span class=cp>{{</span> <span class=nv>date</span> <span class=cp>}}</span><span class=p></</span><span class=nt>span</span><span class=p>></span>
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<a id=__codelineno-9-5 name=__codelineno-9-5 href=#__codelineno-9-5></a> <span class=cp>{%</span> <span class=k>endslot</span> <span class=cp>%}</span>
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<a id=__codelineno-9-6 name=__codelineno-9-6 href=#__codelineno-9-6></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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</code></pre></div> <div class="admonition info"> <p class=admonition-title>Info</p> <p>The <a href=../../reference/template_tags.md#slot><code>{% slot %}</code></a> tag has one special kwarg, <code>name</code>. When you write</p> <div class=highlight><pre><span></span><code><a id=__codelineno-10-1 name=__codelineno-10-1 href=#__codelineno-10-1></a><span class=cp>{%</span> <span class=k>slot</span> <span class=s2>"date"</span> <span class=o>/</span> <span class=cp>%}</span>
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</code></pre></div> <p>It's the same as:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-11-1 name=__codelineno-11-1 href=#__codelineno-11-1></a><span class=cp>{%</span> <span class=k>slot</span> <span class=nv>name</span><span class=o>=</span><span class=s2>"date"</span> <span class=o>/</span> <span class=cp>%}</span>
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</code></pre></div> <p>Other than the <code>name</code> kwarg, you can pass any extra kwargs to the <a href=../../reference/template_tags.md#slot><code>{% slot %}</code></a> tag, and these will be exposed as the slot's data.</p> <div class=highlight><pre><span></span><code><a id=__codelineno-12-1 name=__codelineno-12-1 href=#__codelineno-12-1></a><span class=cp>{%</span> <span class=k>slot</span> <span class=nv>name</span><span class=o>=</span><span class=s2>"date"</span> <span class=nv>kwarg1</span><span class=o>=</span><span class=m>123</span> <span class=nv>kwarg2</span><span class=o>=</span><span class=s2>"text"</span> <span class=nv>kwarg3</span><span class=o>=</span><span class=nv>my_var</span> <span class=o>/</span> <span class=cp>%}</span>
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</code></pre></div> </div> <h3 id=6-accessing-slot-data-in-fills>6. Accessing slot data in fills<a class=headerlink href=#6-accessing-slot-data-in-fills title="Permanent link">¤</a></h3> <p>Now, on the <a href=../../reference/template_tags.md#fill><code>{% fill %}</code></a> tags, we can use the <code>data</code> kwarg to specify the variable under which the slot data will be available.</p> <p>The variable from the <code>data</code> kwarg contains all the extra kwargs passed to the <a href=../../reference/template_tags.md#slot><code>{% slot %}</code></a> tag.</p> <p>So if we set <code>data="slot_data"</code>, then we can access the date variable under <code>slot_data.date</code>:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-13-1 name=__codelineno-13-1 href=#__codelineno-13-1></a><span class=c>{# Default #}</span>
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<a id=__codelineno-13-2 name=__codelineno-13-2 href=#__codelineno-13-2></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=o>/</span> <span class=cp>%}</span>
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<a id=__codelineno-13-3 name=__codelineno-13-3 href=#__codelineno-13-3></a>
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<a id=__codelineno-13-4 name=__codelineno-13-4 href=#__codelineno-13-4></a><span class=c>{# Bold #}</span>
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<a id=__codelineno-13-5 name=__codelineno-13-5 href=#__codelineno-13-5></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
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<a id=__codelineno-13-6 name=__codelineno-13-6 href=#__codelineno-13-6></a> <span class=cp>{%</span> <span class=k>fill</span> <span class=s2>"date"</span> <span class=nv>data</span><span class=o>=</span><span class=s2>"slot_data"</span> <span class=cp>%}</span>
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<a id=__codelineno-13-7 name=__codelineno-13-7 href=#__codelineno-13-7></a> <span class=p><</span><span class=nt>b</span><span class=p>></span> <span class=cp>{{</span> <span class=nv>slot_data.date</span> <span class=cp>}}</span> <span class=p></</span><span class=nt>b</span><span class=p>></span>
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<a id=__codelineno-13-8 name=__codelineno-13-8 href=#__codelineno-13-8></a> <span class=cp>{%</span> <span class=k>endfill</span> <span class=cp>%}</span>
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<a id=__codelineno-13-9 name=__codelineno-13-9 href=#__codelineno-13-9></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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<a id=__codelineno-13-10 name=__codelineno-13-10 href=#__codelineno-13-10></a>
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<a id=__codelineno-13-11 name=__codelineno-13-11 href=#__codelineno-13-11></a><span class=c>{# Italics #}</span>
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<a id=__codelineno-13-12 name=__codelineno-13-12 href=#__codelineno-13-12></a><span class=cp>{%</span> <span class=k>component</span> <span class=s2>"calendar"</span> <span class=nv>date</span><span class=o>=</span><span class=s2>"2024-12-13"</span> <span class=cp>%}</span>
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<a id=__codelineno-13-13 name=__codelineno-13-13 href=#__codelineno-13-13></a> <span class=cp>{%</span> <span class=k>fill</span> <span class=s2>"date"</span> <span class=nv>data</span><span class=o>=</span><span class=s2>"slot_data"</span> <span class=cp>%}</span>
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<a id=__codelineno-13-14 name=__codelineno-13-14 href=#__codelineno-13-14></a> <span class=p><</span><span class=nt>i</span><span class=p>></span> <span class=cp>{{</span> <span class=nv>slot_data.date</span> <span class=cp>}}</span> <span class=p></</span><span class=nt>i</span><span class=p>></span>
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<a id=__codelineno-13-15 name=__codelineno-13-15 href=#__codelineno-13-15></a> <span class=cp>{%</span> <span class=k>endfill</span> <span class=cp>%}</span>
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<a id=__codelineno-13-16 name=__codelineno-13-16 href=#__codelineno-13-16></a><span class=cp>{%</span> <span class=k>endcomponent</span> <span class=cp>%}</span>
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</code></pre></div> <p>By using the <code>date</code> variable from the slot, we'll render the correct date each time:</p> <div class=highlight><pre><span></span><code><a id=__codelineno-14-1 name=__codelineno-14-1 href=#__codelineno-14-1></a><span class=cm><!-- Default --></span>
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<a id=__codelineno-14-2 name=__codelineno-14-2 href=#__codelineno-14-2></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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<a id=__codelineno-14-3 name=__codelineno-14-3 href=#__codelineno-14-3></a> Today's date is <span class=p><</span><span class=nt>span</span><span class=p>></span>2024-12-16<span class=p></</span><span class=nt>span</span><span class=p>></span>
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<a id=__codelineno-14-4 name=__codelineno-14-4 href=#__codelineno-14-4></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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<a id=__codelineno-14-5 name=__codelineno-14-5 href=#__codelineno-14-5></a>
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<a id=__codelineno-14-6 name=__codelineno-14-6 href=#__codelineno-14-6></a><span class=cm><!-- Bold --></span>
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<a id=__codelineno-14-7 name=__codelineno-14-7 href=#__codelineno-14-7></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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<a id=__codelineno-14-8 name=__codelineno-14-8 href=#__codelineno-14-8></a> Today's date is <span class=p><</span><span class=nt>b</span><span class=p>></span>2024-12-16<span class=p></</span><span class=nt>b</span><span class=p>></span>
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<a id=__codelineno-14-9 name=__codelineno-14-9 href=#__codelineno-14-9></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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<a id=__codelineno-14-10 name=__codelineno-14-10 href=#__codelineno-14-10></a>
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<a id=__codelineno-14-11 name=__codelineno-14-11 href=#__codelineno-14-11></a><span class=cm><!-- Italics --></span>
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<a id=__codelineno-14-12 name=__codelineno-14-12 href=#__codelineno-14-12></a><span class=p><</span><span class=nt>div</span> <span class=na>class</span><span class=o>=</span><span class=s>"calendar"</span><span class=p>></span>
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<a id=__codelineno-14-13 name=__codelineno-14-13 href=#__codelineno-14-13></a> Today's date is <span class=p><</span><span class=nt>i</span><span class=p>></span>2024-12-16<span class=p></</span><span class=nt>i</span><span class=p>></span>
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<a id=__codelineno-14-14 name=__codelineno-14-14 href=#__codelineno-14-14></a><span class=p></</span><span class=nt>div</span><span class=p>></span>
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</code></pre></div> <div class="admonition info"> <p class=admonition-title>Info</p> <p><strong>When to use slots vs variables?</strong></p> <p>Generally, slots are more flexible - you can access the slot data, even the original slot content. Thus, slots behave more like functions that render content based on their context.</p> <p>On the other hand, variables are static - the variable you pass to a component is what will be used.</p> <p>Moreover, slots are treated as part of the template - for example the CSS scoping (work in progress) is applied to the slot content too.</p> </div> <aside class=md-source-file> <span class=md-source-file__fact> <span class=md-icon title="Last update"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M21 13.1c-.1 0-.3.1-.4.2l-1 1 2.1 2.1 1-1c.2-.2.2-.6 0-.8l-1.3-1.3c-.1-.1-.2-.2-.4-.2m-1.9 1.8-6.1 6V23h2.1l6.1-6.1zM12.5 7v5.2l4 2.4-1 1L11 13V7zM11 21.9c-5.1-.5-9-4.8-9-9.9C2 6.5 6.5 2 12 2c5.3 0 9.6 4.1 10 9.3-.3-.1-.6-.2-1-.2s-.7.1-1 .2C19.6 7.2 16.2 4 12 4c-4.4 0-8 3.6-8 8 0 4.1 3.1 7.5 7.1 7.9l-.1.2z"/></svg> </span> <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-timeago"><span class=timeago datetime=2025-01-01T16:06:14+00:00 locale=en></span></span><span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-iso_date">2025-01-01</span> </span> <span class=md-source-file__fact> <span class=md-icon title=Contributors> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M12 4a4 4 0 0 1 4 4 4 4 0 0 1-4 4 4 4 0 0 1-4-4 4 4 0 0 1 4-4m0 10c4.42 0 8 1.79 8 4v2H4v-2c0-2.21 3.58-4 8-4"/></svg> </span> <nav> <a href=mailto:juraj.oravec.josefson@gmail.com>Juro Oravec</a> </nav> </span> </aside> </article> </div> <script>var tabs=__md_get("__tabs");if(Array.isArray(tabs))e:for(var set of document.querySelectorAll(".tabbed-set")){var labels=set.querySelector(".tabbed-labels");for(var tab of tabs)for(var label of labels.getElementsByTagName("label"))if(label.innerText.trim()===tab){var input=document.getElementById(label.htmlFor);input.checked=!0;continue e}}</script> <script>var target=document.getElementById(location.hash.slice(1));target&&target.name&&(target.checked=target.name.startsWith("__tabbed_"))</script> </div> <button type=button class="md-top md-icon" data-md-component=top hidden> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M13 20h-2V8l-5.5 5.5-1.42-1.42L12 4.16l7.92 7.92-1.42 1.42L13 8z"/></svg> Back to top </button> </main> <footer class=md-footer> <nav class="md-footer__inner md-grid" aria-label=Footer> <a href=../parametrising_components/ class="md-footer__link md-footer__link--prev" aria-label="Previous: Parametrising components"> <div class="md-footer__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11z"/></svg> </div> <div class=md-footer__title> <span class=md-footer__direction> Previous </span> <div class=md-ellipsis> Parametrising components </div> </div> </a> <a href=../../concepts/fundamentals/single_file_components/ class="md-footer__link md-footer__link--next" aria-label="Next: Single-file components"> <div class=md-footer__title> <span class=md-footer__direction> Next </span> <div class=md-ellipsis> Single-file components </div> </div> <div class="md-footer__button md-icon"> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 24 24"><path d="M4 11v2h12l-5.5 5.5 1.42 1.42L19.84 12l-7.92-7.92L10.5 5.5 16 11z"/></svg> </div> </a> </nav> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> Made with <a href=https://squidfunk.github.io/mkdocs-material/ target=_blank rel=noopener> Material for MkDocs </a> </div> <div class=md-social> <a href=https://github.com/django-components/django-components target=_blank rel=noopener title=github.com class=md-social__link> <svg xmlns=http://www.w3.org/2000/svg viewbox="0 0 496 512"><!-- Font Awesome Free 6.7.2 by @fontawesome - 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