js method to add / to string value code example

Example 1: how to concatenate strings and variables in javascript

const helloName = name => `Hello ${name}!`

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("");