Edit File: UnicodeEscape.js
'use strict'; var GetIntrinsic = require('get-intrinsic'); var $TypeError = GetIntrinsic('%TypeError%'); var callBound = require('call-bind/callBound'); var $charCodeAt = callBound('String.prototype.charCodeAt'); var $numberToString = callBound('Number.prototype.toString'); var $toLowerCase = callBound('String.prototype.toLowerCase'); var StringPad = require('./StringPad'); // https://262.ecma-international.org/11.0/#sec-unicodeescape module.exports = function UnicodeEscape(C) { if (typeof C !== 'string' || C.length !== 1) { throw new $TypeError('Assertion failed: `C` must be a single code unit'); } var n = $charCodeAt(C, 0); if (n > 0xFFFF) { throw new $TypeError('`Assertion failed: numeric value of `C` must be <= 0xFFFF'); } return '\\u' + StringPad($toLowerCase($numberToString(n, 16)), 4, '0', 'start'); };
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