Why Does My JavaScript Code Throw a 'submit is not a function' Error?

Understanding the "Submit is Not a Function" Error in JavaScript

In web development, encountering the error "submit is not a function" in JavaScript when invoking the submit method of a form can be frustrating. It arises when an element within the form is named "submit," conflicting with the in-built submit function of the form object.

Root Cause of the Issue:

The code provided in the question declares a form named "frmProduct" with a button named "submit_value." The submit() method is called on the form through the submitAction() function. However, renaming the button to "submit_value" does not resolve the issue because an input field named "submit" exists within the form, overriding the submit() function.

Solution:

To fix the error, rename the button or input field that bears the name submit. For instance, changing the button's ID to "btnSubmit" and calling submit() on "document.frmProduct.btnSubmit" will rectify the issue.

Example:

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