tapiohuuhaa

I have deleted invalid snippet with phpMyAdmin. If you have access to database with it, use it.

See above – I can’t explain better.

That adds to the head section. New templates should support wp_body_open. That is primarily for JavaScript but can use also for other purposes. Old templates don’t support this.

Because the visual editor use iframe, any CSS for the page doesn’t concern the content of the iframe. It might need to edit the CSS for TinyMCE.

This plugin just adds user defined PHP code. I can’t figure how it could affect elsewhere.

That is just one snippet. I was not annoyed. If all default snippet would have been added, I would have been annoyed.

ok

I just don’t know. The current method looks good but it does have disadvantage.

In the single button, which has round corners, changing deactivate/activate can easily fail, why by accident an unwanted snippet is activated.

If I understand correctly, this however shows, that Code Snippet has been temporary stored snippet into database. Would it be possible that the temporary saving would be done into an additional temp snippet, which will be deleted automatic after some seconds and after validity check? If backend snippet has error, it can’t get “Don’t Panic” information because Code Snippet doesn’t work at all.

setting define(‘CODE_SNIPPETS_SAFE_MODE’, true);

is easier than accessing database.
It would be however nice, if it would be possible to deactive a snippet, which was by accident activated.

Wrong answer. sorry.

set active = 0 for invalid snippet or just delete it

it keeps the stuf in the database

Yes. You must fix invalid snippet with some database tool like phpMyAdmin.

Code Snippet has been run by server.
JavaScript will be run by the browser. Maybe you have duplicate function definitions.

BTW. Vivaldi is more versatile browser than Chrome. It use the same “engine” as Chrome, but you can tile window into several parts and you have additional sidebar on the left, where is notebook and possibility to add some special pages. I use 2-3 windows side by side (temporary sidebar and two tiled windows side by side, where left I edit the page and right I see, how it looks like). Because it shows like Chrome, I don’t use Chrome at all. Chrome is for Vivaldi just a kind of platform, which Vivald has been build more versatile interface.