ubdate

node_modules/es-abstract/2021/UnicodeEscape.js

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+'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');
+};