How to use 'rot13 javascript' in JavaScript

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14function rot13(str) {
15 let response = [];
16 let strLength = str.length;
17
18 for (let i = 0; i < strLength; i++) {
19 const char = str.charCodeAt(i);
20
21 if (char < 65 || (char > 90 && char < 97) || char > 122) {
22 response.push(str.charAt(i));
23 } else if ((char > 77 && char <= 90) || (char > 109 && char <= 122)) {
24 response.push(String.fromCharCode(str.charCodeAt(i) - 13));
25 } else {
26 response.push(String.fromCharCode(str.charCodeAt(i) + 13));
27 }
28
29 }
30 return response.join("");
31}
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95function rot13(string) {
96 return string.replace(/[a-zA-Z]/g, function (c) {
97 return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);
98 })
99}

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