How to interpolate variables in strings in JavaScript, without concatenation?

Question

I know in PHP we can do something like this:

$hello = \"foo\";
$my_string = \"I pity the $hello\";

Output: \"I pity the foo\"<

Answer 1

Peace quote of 2020:

Console.WriteLine("I {0} JavaScript!", ">:D<");

console.log(`I ${'>:D<'} C#`)

Answer 2

Prior to Firefox 34 / Chrome 41 / Safari 9 / Microsoft Edge, nope, that was not possible in javascript. You would have to resort to:

var hello = "foo";
var my_string = "I pity the " + hello;

Answer 3

If you're trying to do interpolation for microtemplating, I like Mustache.js for that purpose.

Answer 4

String.prototype.interpole = function () {
    var c=0, txt=this;
    while (txt.search(/{var}/g) > 0){
        txt = txt.replace(/{var}/, arguments[c]);
        c++;
    }
    return txt;
}

Uso:

var hello = "foo";
var my_string = "I pity the {var}".interpole(hello);
//resultado "I pity the foo"