using push() method to create new child location without unique key stack overflow code example
Example 1: print code in js stackoverflow
<div class="modal-body">
<div class="" id="mydata">
<div id="grid">Some Data</div>
</div>
</div>
<button type="button" id="outageSummary_printBtn" class="btnPrint" data-dismiss="modal" onclick="print()>Print</button>
Example 2: input in javascript stackoverflow
<script language="javascript" type="text/javascript">
lol = document.getElementById('lolz').value;
function kk(){
alert(lol);
}
</script>
<body>
<input type="text" name="enter" class="enter" value="" id="lolz"/>
<input type="button" value="click" OnClick="kk()"/>
</body>