transforming "typeof" to "_typeof" causes an error in Javascript in many webpages

[gogo9th]

Feature Request

Is your feature request related to a problem?
Babel transforms "typeof" to "_typeof". However, some Javascript such as the one in nationalgeographic.com defines the _typeof function, which causes an error due to the conflicting name.

Describe the solution you'd like
The transformed keyword should be more complex than this to avoid conflicts, for example," __babel__typeof." I wonder which files I should modify in order to apply this change.

[babel-bot]

Hey @gogo9th! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite."

[nicolo-ribaudo]

The only _typeof function I can find on https://www.nationalgeographic.com/ is the one defined by Babel, so even renaming it wouldn't avoid the conflict.

However, I don't understand why it causes a problem: are you re-transforming the web pages you visit with Babel?

[fengxinming]

I had a same problem about _typeof

[babel-bot]

Hi @gogo9th! This issue is missing some important information we'll need to be able to reproduce this issue.

Please understand that we receive a high volume of issues, and there are only a limited number of volunteers that help maintain this project. The easier it is for us to decipher an issue with the info provided, the more likely it is that we'll be able to help.

Please make sure you have the following information documented in this ticket:

1. Your Babel configuration (typically from .babelrc or babel.config.js)
2. The current (incorrect) behavior you're seeing
3. The behavior you expect
4. A short, self-contained example

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