How to prevent a form from submitting when a required field is empty using HTML5?

A. Use JavaScript to check for empty fields. B. Set the 'required' attribute on the input fields. C. Set the 'novalidate' attribute on the form tag. D. Use CSS to highlight empty fields.

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Explanation

In HTML5, adding the 'required' attribute to input fields ensures that the form cannot be submitted if those fields are left empty. The browser will automatically prompt the user to fill in the required fields before allowing submission.

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How to prevent a form from submitting when a required field is empty using HTML5?