https://www.mathnet.ru/js/phpjs.js?v=1

1function rawurlencode(str) {
2  //       discuss at: http://phpjs.org/functions/rawurlencode/
3  //      original by: Brett Zamir (http://brett-zamir.me)
4  //         input by: travc
5  //         input by: Brett Zamir (http://brett-zamir.me)
6  //         input by: Michael Grier
7  //         input by: Ratheous
8  //      bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
9  //      bugfixed by: Brett Zamir (http://brett-zamir.me)
10  //      bugfixed by: Joris
11  // reimplemented by: Brett Zamir (http://brett-zamir.me)
12  // reimplemented by: Brett Zamir (http://brett-zamir.me)
13  //             note: This reflects PHP 5.3/6.0+ behavior
14  //             note: Please be aware that this function expects to encode
15  //             into UTF-8 encoded strings, as found on
16  //             note: pages served as UTF-8
17  //        example 1: rawurlencode('Kevin van Zonneveld!');
18  //        returns 1: 'Kevin%20van%20Zonneveld%21'
19  //        example 2: rawurlencode('http://kevin.vanzonneveld.net/');
20  //        returns 2: 'http%3A%2F%2Fkevin.vanzonneveld.net%2F'
21  //        example 3:
22  //        rawurlencode('http://www.google.nl/search?q=php.js&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:en-US:unofficial&client=firefox-a');
23  //        returns 3:
24  //        'http%3A%2F%2Fwww.google.nl%2Fsearch%3Fq%3Dphp.js%26ie%3Dutf-8%26oe%3Dutf-8%26aq%3Dt%26rls%3Dcom.ubuntu%3Aen-US%3Aunofficial%26client%3Dfirefox-a'
25
26  str = (str + '')
27    .toString();
28
29  // Tilde should be allowed unescaped in future versions of PHP (as
30  // reflected below), but if you want to reflect current
31  // PHP behavior, you would need to add ".replace(/~/g, '%7E');" to the
32  // following.
33  return encodeURIComponent(str)
34    .replace(/!/g, '%21')
35    .replace(/'/g, '%27')
36    .replace(/\(/g, '%28')
37    .replace(/\)/g, '%29')
38    .replace(/\*/g, '%2A');
39}