html - Native JavaScript - detect when a div is clicked away from / unfocused -

i need know when div clicked away from, in native javascript.

to test whether or not element clicked element in question using native javascript code can this

var handleclick = function(e) {    var div = document.getelementsbytagname('div')[0];    if (e.target !== div) alert('clicked outside of div');  }  document.addeventlistener('click', handleclick, false);

/* purposes of example */    div {    background: red;    width: 100px;    height: 100px;  }

<div></div>