--- /dev/null
+'use strict';
+var $ = require('../internals/export');
+var uncurryThis = require('../internals/function-uncurry-this');
+var toString = require('../internals/to-string');
+
+var charAt = uncurryThis(''.charAt);
+var charCodeAt = uncurryThis(''.charCodeAt);
+var exec = uncurryThis(/./.exec);
+var numberToString = uncurryThis(1.0.toString);
+var toUpperCase = uncurryThis(''.toUpperCase);
+
+var raw = /[\w*+\-./@]/;
+
+var hex = function (code, length) {
+ var result = numberToString(code, 16);
+ while (result.length < length) result = '0' + result;
+ return result;
+};
+
+// `escape` method
+// https://tc39.es/ecma262/#sec-escape-string
+$({ global: true }, {
+ escape: function escape(string) {
+ var str = toString(string);
+ var result = '';
+ var length = str.length;
+ var index = 0;
+ var chr, code;
+ while (index < length) {
+ chr = charAt(str, index++);
+ if (exec(raw, chr)) {
+ result += chr;
+ } else {
+ code = charCodeAt(chr, 0);
+ if (code < 256) {
+ result += '%' + hex(code, 2);
+ } else {
+ result += '%u' + toUpperCase(hex(code, 4));
+ }
+ }
+ } return result;
+ }
+});