How to Prevent Form Submission in JavaScript and Dojo Toolkit?

Abort Form Submission with JavaScript and Dojo Toolkit

Prevent form submission is essential to handle validation or other conditions before sending data to the server. This article explores how to achieve this using JavaScript and Dojo Toolkit.

Return False from Event Handler

One method to stop form submission is by returning false from the event handler attached to the submit button. As mentioned in the given context, the returnToPreviousPage() function is called upon form validation failure.

Using preventDefault() and Form Validation

To resolve the submission issue and return to the previous page, one can use the preventDefault() method. This method prevents the default behavior of the event, which in this case is form submission.

Here, the validateMyForm() function returns false if validation fails.

Return Value of Validation Function

Another approach is to use the return value of the validation function to prevent form submission.

If the validation passes, the function returns true, allowing the form to be submitted. Otherwise, it returns false, preventing submission.

Handling Chrome Browser Issue

For Chrome versions prior to 27.0.1453.116, an additional step is required to prevent form submission. Setting the event handler parameter's returnValue field to false will ensure that the form does not submit even if the validation function returns true.

``

By using these methods, one can effectively stop form submission in JavaScript and Dojo Toolkit based on different conditions, allowing for more flexible validation and user interaction.

The above is the detailed content of How to Prevent Form Submission in JavaScript and Dojo Toolkit?. For more information, please follow other related articles on the PHP Chinese website!