49 lines
1.7 KiB
JavaScript
49 lines
1.7 KiB
JavaScript
const require_isBuffer = require("../../predicate/isBuffer.js");
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const require_isArrayLike = require("../predicate/isArrayLike.js");
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const require_isPrototype = require("../_internal/isPrototype.js");
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const require_isTypedArray = require("../predicate/isTypedArray.js");
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const require_times = require("../util/times.js");
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//#region src/compat/object/keys.ts
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/**
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* Creates an array of the own enumerable property names of `object`.
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*
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* Non-object values are coerced to objects.
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*
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* @param object The object to query.
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* @returns Returns the array of property names.
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* @example
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* function Foo() {
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* this.a = 1;
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* this.b = 2;
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* }
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* Foo.prototype.c = 3;
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* keys(new Foo); // ['a', 'b'] (iteration order is not guaranteed)
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*
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* keys('hi'); // ['0', '1']
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* keys([1, 2, 3]); // ['0', '1', '2']
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* keys({ a: 1, b: 2 }); // ['a', 'b']
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*/
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function keys(object) {
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if (require_isArrayLike.isArrayLike(object)) return arrayLikeKeys(object);
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const result = Object.keys(Object(object));
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if (!require_isPrototype.isPrototype(object)) return result;
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return result.filter((key) => key !== "constructor");
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}
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function arrayLikeKeys(object) {
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const indices = require_times.times(object.length, (index) => `${index}`);
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const filteredKeys = new Set(indices);
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if (require_isBuffer.isBuffer(object)) {
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filteredKeys.add("offset");
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filteredKeys.add("parent");
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}
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if (require_isTypedArray.isTypedArray(object)) {
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filteredKeys.add("buffer");
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filteredKeys.add("byteLength");
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filteredKeys.add("byteOffset");
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}
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const inheritedKeys = Object.keys(object).filter((key) => !filteredKeys.has(key));
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if (Array.isArray(object)) return [...indices, ...inheritedKeys];
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return [...indices.filter((index) => Object.hasOwn(object, index)), ...inheritedKeys];
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}
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//#endregion
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exports.keys = keys;
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