Addition of `String` and `BigInt` improperly marked as invalid in examples

[Chooks22]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Addition#addition_using_bigints

What specific section or headline is this issue about?

Addition using BigInts

What information was incorrect, unhelpful, or incomplete?

Strings take priority over BigInts as described in the "Description" part of the page, hence it's valid and doesn't throw a TypeError at runtime.

What did you expect to see?

"1" + 2n doesn't throw a TypeError, so it shouldn't be there or should be replaced with a proper invalid example.

Do you have any supporting links, references, or citations?

In the same page. console.log("1" + 2n) also runs in the playground.

Do you have anything more you want to share?

No response

MDN metadata

Page report details

• Folder: en-us/web/javascript/reference/operators/addition
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Addition
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/javascript/reference/operators/addition/index.md
• Last commit: fad67be
• Document last modified: 2025-07-08T13:18:45.000Z