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JavaScript solves white-space node problems in the DOM

Source: Internet
Author: User
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Here's an HTML document


<body>    

When we get the next node of the UL tag, we get used to quoting the following JS
var every = document.getElementById ("Everywhere");        and remove it from the document Console.info (Every.parentnode.childnodes[0].nodetype);
But we found that the console prints theNodetype:3. (Chorme Browser test)
What is the reason for this problem?
This is because there is a space between the UL label and the LI Tag, the browser is mistaken for the text node , so print out the nodetype=3, and actually we need to get the element node Li
How to solve this problem?
The principle is simple, that is to remove the space between the nodes can be;
Here is a function to clear the space
function Cleanwhitespace (oeelement) {for            (var i=0;i<oeelement.childnodes.length;i++) {                var node= Oeelement.childnodes[i];                if (node.nodetype==3 &&!/\s/.test (node.nodevalue)) {                    node.parentNode.removeChild (node)                }            }        }
By using this function, the console prints out thenodetype:1--"This is the positive solution."
For detailed examples see the following index.html








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