JavaScript String Format Not Working

Question

I'm trying to create a string format I have about 8 parameters. I want to do something like this shown below.

string.format("www.website.com?Id={0}&Name={1}", 2,Emma)

However I have tried in JavaScript and it doesn't work.

Could anyone help?

Thanks in advance!

Because that's *not* a standard JavaScript function. One can't make up stuff and expect it work. Instead of blaming JavaScript ("Not Working"), start by searching for how to do the indented task and/or what the "Not Working" error (in the console) means. — user2864740, Jun 29 '15 at 21:01

score 2 · Answer 1 · edited May 23 '17 at 12:00

2

There is no format() method for Javascript string objects.

However, you can easily implement it yourself using the code provided by fearphage: JavaScript equivalent to printf/string.format

edited May 23 '17 at 12:00

Community

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answered Jun 29 '15 at 20:52

Delgan

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Walter Chapilliquen - wZVanG · Answer 2 · 2015-06-29T21:10:33.567

Supporting String.prototype.format():

String.prototype.format = function(){
  var args = arguments;
  return this.replace(/\{(\d+)\}/g, function(a, num){
    return args[num] || a
  })
}

var str = "www.website.com?Id={0}&Name={1}".format(2, "Emma");
alert(str)

If you are in an environment with ECMAScript ES6's support, you can use Template Strings:

var variables = [2, "Emma"];
var str = `www.website.com?Id=${variables[0]}&Name=${variables[1]}`;

JavaScript String Format Not Working

2 Answers2