Check if toolbar element is found on the page before access it

[xepozz]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌

When the toolbar scripts are loaded in case of bundled with other scripts, but the toolbar html is not present on the page any xhr / fetch calls fails on https://github.com/yiisoft/yii2-debug/blob/master/src/assets/js/toolbar.js#L325 with error "Cannot read properties of null (reading 'getAttribute')"

[what-the-diff[bot]]

PR Summary

• Improved Application Reliability The developer has added a check within the code to improve overall application stability. Previously, there has been a scenario where the application attempted to access a particular component (a 'toolbar'), even when it doesn't exist, which could cause problems. To prevent this, a conditional check was added, so the application will only proceed if the 'toolbar' exists. This means the application is less likely to encounter errors or crashes, providing a smoother user experience.

[xepozz]

@cebe @samdark could you please review?

[xepozz]

Done

[xepozz]

Could someone merge it?

[terabytesoftw]

@bizley

[bizley]

Cheers

[xepozz]

Could you also make a tag? Seems no more changes are planned.

[xepozz]

@bizley

[bizley]

Sorry, I'll try to do this today, busy with other work.

[bizley]

Done.