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This article will explain in detail the sample analysis of form submission verification in JS. Xiaobian thinks it is quite practical, so share it with you for reference. I hope you can gain something after reading this article.

When submitting a form, you need to verify the rationality of the value of the input box and text field. You can write the onSubmit event of the form, the code, and the pit stepped on. Note:

1. The onSubmit event of the form will be triggered only if the form is submitted through the submit in the form. If the form is submitted through the onclick event of the button, the onSubmit event of the form will not be triggered.

The correct way to write an onSubmit event is: Enter Details to Login

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