Last Updated: February 25, 2016
· fuadsaud

Dumb JavaScript string interpolation

If you're like me and don't like to concatenate strings (it's ugly!), you may enjoy this simple solution for interpolating expressions with your JS strings:

 if (!String.prototype.interpolate) {
     String.prototype.interpolate = function() {
       var i = 0, text = this;

       for (i = 0; i < arguments.length; i++) {
         text = text.replace('%', arguments[i]);

       return text;

then you can just:

var input = 'coming!';
'Winter is %'.interpolate(input);

it's cleaner and easier to maintain than opening and closing strings and adding those '+' operators. There's no way to escape the '%' character though :(

You can also choose a shorter name than interpolate, if you like shorter things.

2 Responses
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Coffeescript :)

over 1 year ago ·

@sheerun I tried to like coffeescript, but until now, it didn't convinced me. Despite the fact I love ruby syntax, the coffeescript approach seems problematic sometimes :\

over 1 year ago ·