ReferenceError: document is not defined (Typescript)

Question

I'm getting the following error:

"ReferenceError: document is not defined"

This happens while trying to use document.getElementByID(); when using TypeScript.

How do I fix it?

Please provide enough code so others can better understand or reproduce the problem. — Community
– Community Bot, Commented Jun 22, 2022 at 2:06

Barry Michael Doyle · Accepted Answer · 2022-06-22 18:10:26Z

0

This means the document has the potential of being undefined.

You'll need to make a guard statement make TypeScript happy like this:

if (document) document.getElementById();

Now we can be sure that document exists before trying to call getElementById(), this prevents us from running into issue where document is undefined.

answered Jun 22, 2022 at 18:10

Barry Michael Doyle

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2 Comments

Ashley Southworth Over a year ago

We need to probably figure out why his document is coming up as undefined rather than just skipping that part of the function when it is.... odds are he's in some framework where document is not available.

Barry Michael Doyle Over a year ago

It probably isn't coming up as undefined at the point that they're using it. This just a guard to make TypeScript happy. They could do an else throw something. Another quick hand could just be writing document?.getElementById();

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