42 lines
1.4 KiB
JavaScript
42 lines
1.4 KiB
JavaScript
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'use strict';
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var $TypeError = require('es-errors/type');
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var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
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var IsExtensible = require('./IsExtensible');
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var IsPropertyKey = require('./IsPropertyKey');
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var Type = require('./Type');
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// https://262.ecma-international.org/13.0/#sec-definemethodproperty
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module.exports = function DefineMethodProperty(homeObject, key, closure, enumerable) {
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if (Type(homeObject) !== 'Object') {
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throw new $TypeError('Assertion failed: `homeObject` is not an Object');
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}
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if (!IsPropertyKey(key)) {
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throw new $TypeError('Assertion failed: `key` is not a Property Key or a Private Name');
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}
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if (typeof closure !== 'function') {
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throw new $TypeError('Assertion failed: `closure` is not a function');
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}
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if (typeof enumerable !== 'boolean') {
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throw new $TypeError('Assertion failed: `enumerable` is not a Boolean');
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}
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// 1. Assert: homeObject is an ordinary, extensible object with no non-configurable properties.
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if (!IsExtensible(homeObject)) {
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throw new $TypeError('Assertion failed: `homeObject` is not an ordinary, extensible object, with no non-configurable properties');
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}
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// 2. If key is a Private Name, then
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// a. Return PrivateElement { [[Key]]: key, [[Kind]]: method, [[Value]]: closure }.
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// 3. Else,
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var desc = { // step 3.a
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'[[Value]]': closure,
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'[[Writable]]': true,
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'[[Enumerable]]': enumerable,
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'[[Configurable]]': true
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};
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DefinePropertyOrThrow(homeObject, key, desc); // step 3.b
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};
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