Trigger invalid event jquery
<p>Can "the invalid popup" be triggered by custom function without submit a form?</p>

<p>Invalid popup -> <a href="https://www.html5rocks.com/static/images/tutorials/constraintvalidation/ChromeForAndroid.png" rel="nofollow noreferrer">https://www.html5rocks.com/static/images/tutorials/constraintvalidation/ChromeForAndroid.png</a></p>

<p><a href="https://i.stack.imgur.com/L1cBF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/L1cBF.png" alt="enter image description here"></a></p>