Do we have something like C# String.Format(...) in JavaScript? [duplicate]

Question

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JavaScript equivalent to printf/string.format

Do we have something like C# String.Format(...) in JavaScript?

I like to be able to say String.Format('text text {0}, text text {1}', value1, value2);

and ideally as an extension method:

'text text {0}, text text {1}'.format(value1, value2);

Thanks,

Community · Accepted Answer · 2017-05-23 11:47:33Z

4

here is your solution:

String.format = function() {
  var s = arguments[0];
  for (var i = 0; i < arguments.length - 1; i++) {       
    var reg = new RegExp("\\{" + i + "\\}", "gm");             
    s = s.replace(reg, arguments[i + 1]);
  }

  return s;
}

more informations here => Equivalent of String.format in jQuery

edited May 23, 2017 at 11:47

CommunityBot

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answered Jul 20, 2011 at 12:18

dknaack

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3 Comments

The Light Over a year ago

How is it possible to have the format method as an extension method of the string instance? e.g. accessing it with "text {0} text {1}".format(value1, value2); the benefit is having less code.

pimvdb Over a year ago

@William: gist.github.com/1096824

Marek Bar Over a year ago

How to use the above code in the same way as I use extension methods in C#?

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