AngularJS Username Already In Use Example Directive

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So this is how you can use ajax validation with an AngularJS directive to check if a username is already in use (by another registered user).

  1. User types a username
  2. Ajax request to back-end with username
  3. back-end checks if username already exists
  4. front end displays outcome

ajax validation with angularJS to check if a username is already in use

What is going on:

  • There is an ng directive to check for unique values
  • There is an ng service to perform the ajax checks to the back-end
  • There is a back-end api function which checks the db

That’s pretty much it.



ng template (view)

Example back-end (Laravel PHP)



As you can see from the console result the check is working like we want.

Further reading:

Sam Deering

Sam Deering

Sam is a web developer, online entrepreneur and investor. In his spare time he enjoys coding, playing chess and sharing what he learns with others.

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