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rated 0 times [ 32] [ 4] / answers: 1 / hits: 32949 / 10 Years ago, sun, june 1, 2014, 12:00:00

Just trying to use javascript's regex capabilities with the .test() function.

  var nameRegex = '/^[a-zA-Z0-9_]{6,20}$/';



  if(nameRegex.test($('#username').val())) {

      ...

  }

The error is on this line if(nameRegex.test($('#username').val())) {

Debugger breaks there and says Uncaught TypeError: undefined is not a function. It seems like .test() is not defined? Shouldn't it be?

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answered 10 Years ago keana · Accepted Answer

As it currently stands, nameRegex isn't a regex but a string and String doesn't have test functon which is why you are getting that error.

Remove the quotes around your regex. That is the literal form of regex.

var nameRegex = /^[a-zA-Z0-9_]{6,20}$/; //remove the quotes