JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" id="checkin1" class="checking" >
<input type="checkbox" id="checkin2" class="checking" >
<input type="checkbox" id="checkin3" class="checking">

JavaScript

$(":checkbox").change(function(){
    if(this.checked){
        alert($(this).val());
    }else{
			alert($(this).val());
    }
});