hatch-surf/node_modules/es-abstract/2021/SetFunctionLength.js
Riley Zhang df378d33ef
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Merge GitHub main into Gitea repo (allow unrelated histories)
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Co-Authored-By: Paperclip <noreply@paperclip.ing>
2026-06-25 05:20:46 +02:00

29 lines
1018 B
JavaScript

'use strict';
var $TypeError = require('es-errors/type');
var isInteger = require('math-intrinsics/isInteger');
var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
var HasOwnProperty = require('./HasOwnProperty');
var IsExtensible = require('./IsExtensible');
// https://262.ecma-international.org/12.0/#sec-setfunctionlength
module.exports = function SetFunctionLength(F, length) {
if (typeof F !== 'function' || !IsExtensible(F) || HasOwnProperty(F, 'length')) {
throw new $TypeError('Assertion failed: `F` must be an extensible function and lack an own `length` property');
}
if (typeof length !== 'number') {
throw new $TypeError('Assertion failed: `length` must be a Number');
}
if (length !== Infinity && (!isInteger(length) || length < 0)) {
throw new $TypeError('Assertion failed: `length` must be ∞, or an integer >= 0');
}
return DefinePropertyOrThrow(F, 'length', {
'[[Configurable]]': true,
'[[Enumerable]]': false,
'[[Value]]': length,
'[[Writable]]': false
});
};