JSFiddle - React, Tailwind, and code Playground

by Joe Cisneros

JavaScript

String.prototype.nextChar = function(i) {
    var n = i | 1;
    return String.fromCharCode(this.charCodeAt(0) + n);
}
    
String.prototype.prevChar = function(i) {
    var n = i | 1;
    return String.fromCharCode(this.charCodeAt(0) - n);
}
    
    document.write('a'.nextChar());
document.write('</br>');
    document.write('b'.prevChar());