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refactor: Cleanup options object parameters (#4296)

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Nayeem Rahman 2020-03-10 16:08:58 +00:00 • committed by GitHub
parent fbc4731256
commit 6443e4aed1
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17 changed files with 110 additions and 164 deletions
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20
cli/js/web/blob.ts
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@ -1,6 +1,5 @@
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import * as domTypes from "./dom_types.ts";
import { hasOwnProperty } from "../util.ts";
import { TextEncoder } from "./text_encoding.ts";
import { build } from "../build.ts";
@ -144,34 +143,29 @@ export class DenoBlob implements domTypes.Blob {
return;
}
options = options || {};
// Set ending property's default value to "transparent".
if (!hasOwnProperty(options, "ending")) {
options.ending = "transparent";
}
if (options.type && !containsOnlyASCII(options.type)) {
const { ending = "transparent", type = "" } = options ?? {};
if (!containsOnlyASCII(type)) {
const errMsg = "The 'type' property must consist of ASCII characters.";
throw new SyntaxError(errMsg);
}
const bytes = processBlobParts(blobParts!, options);
const bytes = processBlobParts(blobParts!, { ending, type });
// Normalize options.type.
let type = options.type ? options.type : "";
let normalizedType = type;
if (type.length) {
for (let i = 0; i < type.length; ++i) {
const char = type[i];
if (char < "\u0020" || char > "\u007E") {
type = "";
normalizedType = "";
break;
}
}
type = type.toLowerCase();
normalizedType = type.toLowerCase();
}
// Set Blob object's properties.
this[bytesSymbol] = bytes;
this.size = bytes.byteLength;
this.type = type;
this.type = normalizedType;
// Register bytes for internal private use.
blobBytesWeakMap.set(this, bytes);