CODEWITHSUNDEEP
javascriptbrowserfrontend
Ghansham
Ghansham

Reputation: 498

When window.document.baseURI be "undefined"?

I always saw in the developer tool that both the entities(baseURI and URL) show the same URL, which is shown in the address bar most of the time. These are the properties of window.document object. So when is the situation that base URI property is "undefined"?

Upvotes: 0

Views: 1562

Answers (2)

karoluS
karoluS

Reputation: 3218

Adding to the answer of @Thomas. The IE11 (or lower) does not support baseURI property thus it will always be undefined.

Upvotes: 1

Thomas
Thomas

Reputation: 182000

They do different things.

For what's in the address bar, you typically want window.location.href.

The baseURI property of nodes, on the other hand, is used as the base for resolving relative URLs within that node, for example the src of an image or href of a link. The baseURI can be changed by adding a <base> element.

I have found no situations where baseURI is undefined. Even in a document created through document.implementation.createDocument, it is just inherited from the current document. Adding an empty <base> element has no effect. Assigning undefined to baseURI is simply ignored.

Upvotes: 3

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