21 lines
515 B
JavaScript
21 lines
515 B
JavaScript
'use strict';
|
|
|
|
var $RangeError = require('es-errors/range');
|
|
|
|
var ToIntegerOrInfinity = require('./ToIntegerOrInfinity');
|
|
|
|
var maxSafeInteger = require('../helpers/maxSafeInteger');
|
|
|
|
// https://262.ecma-international.org/15.0/#sec-toindex
|
|
|
|
module.exports = function ToIndex(value) {
|
|
if (typeof value === 'undefined') {
|
|
return 0;
|
|
}
|
|
var integer = ToIntegerOrInfinity(value);
|
|
if (integer < 0 || integer >= maxSafeInteger) {
|
|
throw new $RangeError('index must be >= 0 and < 2 ** 53 - 1');
|
|
}
|
|
return integer;
|
|
};
|