Head Rush Ajax

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237

the document object model

Some browsers don’t recognize Node

Unfortunately, some web browsers don’t support the Node

class in your JavaScript. Your code won’t run, and you’re back

to dealing with errors and null values.

if (someNode.nodeType == Node.ELEMENT_NODE) {

// Do something with the element node

} else if (someNode.nodeType == Node.TEXT_NODE) {

// Do something with the text node

}

All browsers support the

nodeType proeprty...

...but several browsers report an

error right here.

Here’s IE reporting

that it doesn’t

recognize the Node

object in your code.

Q:

So as long as my users aren’t running Internet

Explorer, I can use the Node object, right?

A: Actually, you shouldn’t ever use the Node object... at least

not until all major browsers support the Node object. Even if you

don’t think your users are running IE, it’s still the world’s most

popular browser (by a long-shot). In the next chapter, you’’ll see

that you can get the same results with a little more work, and end

up with code that works on all browsers.

questions

Frequently asked

?