oninvalid event, which is triggered when the input tag check is invalid, and prompts an error message
it is strange that when there is more than one input in form, you can block error messages in the following ways:
</div>
</form>
<script>
var form = document.querySelectorAll( "form" )[0];
form.addEventListener( "invalid", function( event ) {
event.preventDefault();
},true);
form.oninvalid=function(e){
return false;
}
</script>
</body>
</html>
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