Tech Stuff - DOM hasChildNodes

W3C Core Reference. Part of the Node Interface

hasChildNodes Method

Returns a boolean 'true' if the node has child nodes, 'false' if not.

Syntax

bool = node.hasChildNodes()

Related Stuff

childNodes attribute, removeNode method

Parameters

none

Examples

// get a reference to an existing object
	obj = document.getElementById("one");
	// empty this object of its children
	while(obj.hasChildNodes() == true)
	{
		obj.removeChild(obj.childNodes[0]);
	}

The above fragment empties a node of its child nodes.

Notes:

The reference childNodes[0] dynamically changes so index of '0' will delete the first node until empty. And yes, you could write while(obj.hasChildNodes()) to control the loop! Finally, obj.hasChildNodes tests for the availability of the method and ALWAYS returns 'true', you must use the parenthesis to get the results you want.

Problems, comments, suggestions, corrections (including broken links) or something to add? Please take the time from a busy life to 'mail us' (at top of screen), the webmaster (below) or info-support at zytrax. You will have a warm inner glow for the rest of the day.