lix-website/themes/lix/assets/bootstrap/node_modules/es-abstract/2022/IsValidIntegerIndex.js

32 lines
887 B
JavaScript
Raw Normal View History

2024-04-27 03:39:10 +00:00
'use strict';
var $TypeError = require('es-errors/type');
var IsDetachedBuffer = require('./IsDetachedBuffer');
var IsIntegralNumber = require('./IsIntegralNumber');
var isNegativeZero = require('../helpers/isNegativeZero');
var typedArrayBuffer = require('typed-array-buffer');
// https://262.ecma-international.org/12.0/#sec-isvalidintegerindex
module.exports = function IsValidIntegerIndex(O, index) {
// Assert: O is an Integer-Indexed exotic object.
var buffer = typedArrayBuffer(O); // step 1
if (typeof index !== 'number') {
throw new $TypeError('Assertion failed: Type(index) is not Number');
}
if (IsDetachedBuffer(buffer)) { return false; } // step 2
if (!IsIntegralNumber(index)) { return false; } // step 3
if (isNegativeZero(index)) { return false; } // step 4
if (index < 0 || index >= O.length) { return false; } // step 5
return true; // step 6
};