Technology Guru

 jQuery select change show/hide div event <script>   $(document).ready(function(){     $('#selectID').on('change', function() {       if ( this.value == 'red')       {         $("#divid").show();       }       else       {         $("#divid").hide();       }     }); }); </script>

Prevent SweetAlert to be closed on clicking outside the popup window If you are using Sweet Alert 2, you can use this configuration allowOutsideClick: false, To stop closing by escape key use below also: allowEscapeKey: false,

  Check if inputs are empty using jQuery Option 1 $( 'input' ). blur ( function ( ) { if ( !$( this ). val () ) { $( this ). parents ( 'p' ). addClass ( 'warning' ); } }); Option 2 $( input' ). blur ( function ( ) { if ( $( this ). val (). length === 0 ) { $( this ). parents ( 'p' ). addClass ( 'warning' ); } }); Option 3 $( input' ). blur ( function ( ) { if ( ! this . value ) { $( this ). parents ( 'p' ). addClass ( 'warning' ); } });

  We can make it So simple like below: <input type="number"  onkeydown="javascript: return event.keyCode == 69 ? false : true" /> we can make it even more simple: <input type="number" onkeydown="return event.keyCode !== 69" />