You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
1.0 KiB
31 lines
1.0 KiB
'use strict'; |
|
|
|
var GetIntrinsic = require('get-intrinsic'); |
|
|
|
var $TypeError = GetIntrinsic('%TypeError%'); |
|
|
|
var DefinePropertyOrThrow = require('./DefinePropertyOrThrow'); |
|
var HasOwnProperty = require('./HasOwnProperty'); |
|
var IsExtensible = require('./IsExtensible'); |
|
var IsInteger = require('./IsInteger'); |
|
var Type = require('./Type'); |
|
|
|
// https://262.ecma-international.org/9.0/#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 (Type(length) !== 'Number') { |
|
throw new $TypeError('Assertion failed: `length` must be a Number'); |
|
} |
|
if (length < 0 || !IsInteger(length)) { |
|
throw new $TypeError('Assertion failed: `length` must be an integer >= 0'); |
|
} |
|
return DefinePropertyOrThrow(F, 'length', { |
|
'[[Configurable]]': true, |
|
'[[Enumerable]]': false, |
|
'[[Value]]': length, |
|
'[[Writable]]': false |
|
}); |
|
};
|
|
|