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fc4819e1e0
Refactors Event and EventTarget so that they better encapsulate their non-public data as well as are more forward compatible with things like DOM Nodes. Moves `dom_types.ts` -> `dom_types.d.ts` which was always the intention, it was a legacy of when we used to build the types from the code and the limitations of the compiler. There was a lot of cruft in `dom_types` which shouldn't have been there, and mis-alignment to the DOM standards. This generally has been eliminated, though we still have some minor differences from the DOM (like the removal of some deprecated methods/properties). Adds `DOMException`. Strictly it shouldn't inherit from `Error`, but most browsers provide a stack trace when one is thrown, so the behaviour in Deno actually better matches the browser. `Event` still doesn't log to console like it does in the browser. I wanted to get this raised and that could be an enhancement later on (it currently doesn't either).
95 lines
2.2 KiB
TypeScript
95 lines
2.2 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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export type TypedArray =
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| Int8Array
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| Uint8Array
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| Uint8ClampedArray
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| Int16Array
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| Uint16Array
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| Int32Array
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| Uint32Array
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| Float32Array
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| Float64Array;
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// @internal
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export function isTypedArray(x: unknown): x is TypedArray {
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return (
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x instanceof Int8Array ||
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x instanceof Uint8Array ||
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x instanceof Uint8ClampedArray ||
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x instanceof Int16Array ||
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x instanceof Uint16Array ||
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x instanceof Int32Array ||
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x instanceof Uint32Array ||
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x instanceof Float32Array ||
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x instanceof Float64Array
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);
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}
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// @internal
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export function requiredArguments(
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name: string,
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length: number,
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required: number
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): void {
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if (length < required) {
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const errMsg = `${name} requires at least ${required} argument${
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required === 1 ? "" : "s"
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}, but only ${length} present`;
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throw new TypeError(errMsg);
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}
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}
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// @internal
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export function immutableDefine(
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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o: any,
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p: string | number | symbol,
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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value: any
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): void {
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Object.defineProperty(o, p, {
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value,
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configurable: false,
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writable: false,
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});
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}
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// @internal
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export function hasOwnProperty(obj: unknown, v: PropertyKey): boolean {
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if (obj == null) {
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return false;
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}
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return Object.prototype.hasOwnProperty.call(obj, v);
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}
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/** Returns whether o is iterable.
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*
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* @internal */
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export function isIterable<T, P extends keyof T, K extends T[P]>(
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o: T
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): o is T & Iterable<[P, K]> {
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// checks for null and undefined
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if (o == null) {
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return false;
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}
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return (
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typeof ((o as unknown) as Iterable<[P, K]>)[Symbol.iterator] === "function"
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);
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}
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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interface GenericConstructor<T = any> {
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prototype: T;
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}
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/** A helper function which ensures accessors are enumerable, as they normally
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* are not. */
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export function defineEnumerableProps(
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Ctor: GenericConstructor,
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props: string[]
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): void {
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for (const prop of props) {
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Reflect.defineProperty(Ctor.prototype, prop, { enumerable: true });
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}
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}
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