Issue with "Function.prototype.displayName": Firefox's usage of displayName has changed

[Josh-Cena]

MDN URL

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/displayName

What specific section or headline is this issue about?

No response

What information was incorrect, unhelpful, or incomplete?

By entering the following in a console, it should display as something like function My Function():

const a = function () {};
a.displayName = 'My Function';

a; // "function My Function()"

What did you expect to see?

In recent FF versions, it only shows function Function(). My guess is that it's truncated to the last valid identifier, but I'm not sure.

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

Output in FF 104:

Do you have anything more you want to share?

No response

MDN metadata

Page report details

• Folder: en-us/web/javascript/reference/global_objects/function/displayname
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/displayName
• GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/javascript/reference/global_objects/function/displayname/index.md
• Last commit: 9483a78
• Document last modified: 2022-08-08T09:47:14.000Z