| Path : /var/www/html/infraai.ai/frontend/node_modules/es-abstract/2017/ |
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| Current File : /var/www/html/infraai.ai/frontend/node_modules/es-abstract/2017/StringGetOwnProperty.js |
'use strict';
var $TypeError = require('es-errors/type');
var isObject = require('es-object-atoms/isObject');
var callBound = require('call-bound');
var $charAt = callBound('String.prototype.charAt');
var $stringToString = callBound('String.prototype.toString');
var CanonicalNumericIndexString = require('./CanonicalNumericIndexString');
var IsInteger = require('./IsInteger');
var isPropertyKey = require('../helpers/isPropertyKey');
var isNegativeZero = require('math-intrinsics/isNegativeZero');
// https://262.ecma-international.org/8.0/#sec-stringgetownproperty
module.exports = function StringGetOwnProperty(S, P) {
var str;
if (isObject(S)) {
try {
str = $stringToString(S);
} catch (e) { /**/ }
}
if (typeof str !== 'string') {
throw new $TypeError('Assertion failed: `S` must be a boxed string object');
}
if (!isPropertyKey(P)) {
throw new $TypeError('Assertion failed: P is not a Property Key');
}
if (typeof P !== 'string') {
return void undefined;
}
var index = CanonicalNumericIndexString(P);
var len = str.length;
if (typeof index === 'undefined' || !IsInteger(index) || isNegativeZero(index) || index < 0 || len <= index) {
return void undefined;
}
var resultStr = $charAt(S, index);
return {
'[[Configurable]]': false,
'[[Enumerable]]': true,
'[[Value]]': resultStr,
'[[Writable]]': false
};
};