JSFiddle - React, Tailwind, and code Playground

HTML

<input type="checkbox" name="type" value="4" id="jivan" />
<input type="checkbox" name="type" value="3" />
<input type="checkbox" name="type" value="1" />
<input type="checkbox" name="type" value="5" />

JavaScript

$("input:checkbox[name=type]:checked").each(function(){
  
    var aaa =  yourArray.push($(this).val());
    alert(aaa);
});