change color of input if submit clicked and input is empty

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Vincenzo
24 Jan 2018
1HTML :
2Text <input type="text">
3<button>Click Me</button>
4--------------------------
5JQuery :
6$("button").on("click",function(){
7    if($("[type='text']").val() == null){
8        $(this).css("border","2px solid red");
9    } 
10});
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