CODEWITHSUNDEEP
javascriptinternet-explorer-7
Mansiemans
Mansiemans

Reputation: 894

HTMLElement prototype in IE7

I wish to check if an argument passed to my function is an HTMLElement, using the instanceof operator. I know that this doesn't work in IE7, because AFAIK IE7 doesn't define HTMLElement. I figured: no problem, I'll just fall back to a parent prototype like Node. But, as answers on StackOverflow have learned me, the Node-object is also not defined in IE7

What now is the best way to test if my parameter is a node/HTMLElement? Am I doing it wrong?

Upvotes: 1

Views: 867

Answers (2)

user912695
user912695

Reputation:

I have not used IE7 in ages, but I would check with a if (typeof elementNode == 'element') It might be 'element' or 'HTMLElement'. To make sure first do an alert(typeof elementNode); to know what its type will be. So then you can compare against it.

Edit: first commenter clarified ↑ this should not work.

Then I would try checking if there is such a member like nodeType or nodeName. Maybe with something like if (elementNode.nodeName !== null) just as example. Always try alert()ing before.

Upvotes: 0

katspaugh
katspaugh

Reputation: 17899

In the Node interface HTMLElement corresponds to nodes of type 1.

const unsigned short      ELEMENT_NODE                   = 1;

http://www.w3.org/TR/DOM-Level-2-Core/core.html#ID-1841493061

Thus, you should check for the argument's nodeType:

if (arg && 1 === arg.nodeType) { /* ... */ }

Upvotes: 2

Related Questions