Question

I’m trying to move some JavaScript code from MicrosoftAjax to JQuery. I use the JavaScript equivalents in MicrosoftAjax of the popular .net methods, e.g. String.format(), String.startsWith(), etc. Are there equivalents to them in jQuery?

Answer 1

The source code for ASP.NET AJAX is available for your reference, so you can pick through it and include the parts you want to continue using into a separate JS file. Or, you can port them to jQuery.

Here is the format function…

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;
}

And here are the endsWith and startsWith prototype functions…

String.prototype.endsWith = function (suffix) {
  return (this.substr(this.length - suffix.length) === suffix);
}

String.prototype.startsWith = function(prefix) {
  return (this.substr(0, prefix.length) === prefix);
}