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.
23 lines
654 B
23 lines
654 B
4 years ago
|
'use strict';
|
||
|
|
|
||
|
|
var GetIntrinsic = require('get-intrinsic');
|
||
|
|
|
||
|
|
var $TypeError = GetIntrinsic('%TypeError%');
|
||
|
|
|
||
|
|
var SameValue = require('./SameValue');
|
||
|
|
var ToNumber = require('./ToNumber');
|
||
|
|
var ToString = require('./ToString');
|
||
|
|
var Type = require('./Type');
|
||
|
|
|
||
|
|
// https://ecma-international.org/ecma-262/6.0/#sec-canonicalnumericindexstring
|
||
|
|
|
||
|
|
module.exports = function CanonicalNumericIndexString(argument) {
|
||
|
|
if (Type(argument) !== 'String') {
|
||
|
|
throw new $TypeError('Assertion failed: `argument` must be a String');
|
||
|
|
}
|
||
|
|
if (argument === '-0') { return -0; }
|
||
|
|
var n = ToNumber(argument);
|
||
|
|
if (SameValue(ToString(n), argument)) { return n; }
|
||
|
|
return void 0;
|
||
|
|
};
|