JSFiddle - React, Tailwind, and code Playground

by Xeon06

JavaScript

function f(str) {
    return "\"" + addslashes(str) + "\"";
};

function addslashes (str) {
    // http://kevin.vanzonneveld.net
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Ates Goral (http://magnetiq.com)
    // +   improved by: marrtins
    // +   improved by: Nate
    // +   improved by: Onno Marsman
    // +   input by: Denny Wardhana
    // +   improved by: Brett Zamir (http://brett-zamir.me)
    // +   improved by: Oskar Larsson Högfeldt (http://oskar-lh.name/)
    // *     example 1: addslashes("kevin's birthday");
    // *     returns 1: 'kevin\'s birthday'
    return (str + '').replace(/[\\"']/g, '\\$&').replace(/\u0000/g, '\\0');
}

alert(f("Foo"));
alert(f("Foo \"bar\""));