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Jquery Ui Uncaught TypeError : Undefined is not a function

While working with Jquery Ui we have many times face this Jquery or Javascript error that uncaught typerror undefined is not a function. Many times I have also face this Jquery Ui error and so I find all reasons and solutions for this Jquery Ui Uncaught TypeError : Undefined is not a function error.

Reasons and solutions for Jquery Ui Uncaught TypeError : Undefined is not a function

Before going in deep discussion of this topic, let me clear you that here we are discussing only on Jquery Ui error of Jquery Ui Uncaught TypeError : Undefined is not a function not a general Javascript or Jquery Error on this error. If you face this issue in your main Jquery or Javascript than you can refer article on uncaught typeerror undefined is not a function in Jquery or Javascript.

Now let’s go through one by one all reasons and solutions for this Jquery Ui error.

  1. Conflict of Jquery Ui js with Main Jquery or Javascript
  2. First we have to ensure that our current Jquery Ui JS version is quite compatible with our main Jquery version. You can check current Jquery Ui Js compatibility with your Main Jquery file here in Wikipedia Jquery Ui Js compatibility with Main Jquery Version.

  3. Due to not proper order of Juqery
  4. This one also makes big difference as if we have not proper order of JQuery than it can also raise this Jquery Ui error. As early I have mention that we have compatible Jquery Ui Js version with our Jquery Main Version as well order of Jquery must be like that first we have to add our Main Jquery version which compatible with our Jquery Ui Js than we can add Jquery Ui Js as shown below.

  5. Jquery Ui CSS not added or may not be provide before Jquery Ui js
  6. We have to ensure that we have first added Jquery Ui css than Jquery Ui Js and also have to check that Jquery Ui CSS added properly before Jquery Ui Js as given below.

  7. Parse Html inside document.ready function
  8. One important thing that we have to consider that we have passed all our Html tags in scripts inside document.ready fucntion as well it is best practice to put scripting code is below because Html load from top to bottom.

  9. Could be naming conflict issue, use jQuery.noConflict
  10. This thing also you have to keep in mind while using Jquery Ui. You must have not any naming conflicts in your application. If you any conflicts with keyword like “Jquery” or “$” than you can Jquery.noConflict as suggest below.

What is your opinion ?

Here we have seen all possible reasons and solutions for uncaught typeerror undefined is not a function error in Jquery Ui. I hope it will be very useful to overcome from this Jquery error and you will enjoy it. If you have any query and question, you can comment or you can mail me.

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