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javascript - Remove DOM text from variable with JQuery

I need to Remove this First Name : ONLY. I have already assign it to a variable. how to remove only that from DOM.

example:

First Name :<input type="text" name="first_name" id="firstName" value="" maxlength="100" />

var label = document.getElementById(id)['previousSibling'].nodeValue;

now the label variable contains the value First Name : I need to remove this dynamically from the DOM.

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You can use removeChild() method like

var node = document.getElementById('firstName')['previousSibling'],
    label = node.nodeValue;
node.parentNode.removeChild(node);

Demo: Fiddle


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