Basic HTML and HTML5: Use HTML5 to Require a Field

You can require specific form fields so that your user will not be able to submit your form until he or she has filled them out.

For example, if you wanted to make a text input field required, you can just add the attribute required within your input element, like this: <input type="text" required>

Make your text input a required field, so that your user can't submit the form without completing this field.

Then try to submit the form without inputting any text. See how your HTML5 form notifies you that the field is required?

<h2>CatPhotoApp</h2>
<main>
  <p>Click here to view more <a href="#">cat photos</a>.</p>

  <a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>

  <p>Things cats love:</p>
  <ul>
    <li>cat nip</li>
    <li>laser pointers</li>
    <li>lasagna</li>
  </ul>
  <p>Top 3 things cats hate:</p>
  <ol>
    <li>flea treatment</li>
    <li>thunder</li>
    <li>other cats</li>
  </ol>
  <form action="/submit-cat-photo">
    <input type="text" placeholder="cat photo URL" required>
    <button type="submit">Submit</button>
  </form>
</main>

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