HTML required field test
HTML
<form>
<label for="test">Test field</label>
<input required id="test" name="test" type="text">
<button type="submit">Submit</button>
</form>
<form>
<label for="test">Test field</label>
<input required id="test" name="test" type="text">
<button type="submit">Submit</button>
</form>