add to a string in js code example

Example 1: string concatenation in js

var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2);
console.log(res);

Example 2: string javascript concatenation

var dest = new String("");
    var src = new String("aze");
    var ar = new Array();
    ...
    ar.push(src);
    ar.push(src);
    ...
    dest = ar.join("");

Example 3: concat no and string in javascript

['Hello', ' ', 'World'].join(''); // 'Hello World'

Example 4: string javascript concatenation

var dest = new String("");
    var src = new String("aze");
    ...
    dest += src + src + src + src + src;