fix(tooltip): fix potential NPE when the parent node of the tooltip element doesn't exist

[plainheart]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

1. Fix potential NPE when the parent node of the tooltip element doesn't exist.
2. clear timers when disposing

Fixed issues

• Fix eChart tooltip error (TypeError) when mychart.dispose command is included  #19248

Details

Before: What was the problem?

As the tooltip dispose is using parentNode.removeChild to remove the element itself and there is no non-null check, an NPE issue may occur.

After: How does it behave after the fixing?

Switch to use the element's own remove API.
Add a non-null check before calling parentNode.removeChild

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#xxx

Misc

ZRender Changes

• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

N.A.

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

[echarts-bot]

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[github-actions]

The changes brought by this PR can be previewed at: https://echarts.apache.org/examples/editor?version=PR-19265@0d29cd8

[linghaoSu]

It seems that the browser compatibility does not encompass Internet Explorer. Should this be a matter of concern?

[plainheart]

Thanks for your comment. I've noticed the compatibility of IE, it's a pity. Most of the users should have been not able to open the IE browser or will be redirected to Microsoft Edge in their Windows 10 or 11. I would expect we can drop the support gradually. But for now, as per your concern, I decided to reserve the support for IE 11.

[linghaoSu]

I also agree that support for Internet Explorer should be drop gradually, but I am uncertain as to which version we should ensure browser compatibility with. What are your thoughts?

[plainheart]

Maybe the best time to drop support for IE and other old-fashion browsers is the release of a main version of ECharts, for example, the ECharts 6.0. We can continue to discuss on this problem by that time.

[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍