fix: 插槽组件局部更新使得事件id增长，极端情况下可能导致页面卡死 #5033
Open
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
插槽组件局部更新会导致事件id变化，如果插槽内有大量事件（如：插槽内是列表每条都加点击事件），每次更新都会事件id都会大量增长。
事件id变化又可能触发局部组件渲染，无限循环导致页面卡死（似乎复现条件较为苛刻，这个demo我调了好久才成功复现，且仅在钉钉小程序中有效）
https://github.com/acyza/uni-app/tree/pr_2_demo
此demo仅在钉钉小程序中复现，在开发者工具中可以看到插槽中的事件id在无限刷新（注：demo页较为简单，可能并未导致页面完全卡死，复杂点的页面是可能会卡死的）。
此pr将插槽内的id生成，从使用插槽所在组件实例生成改为使用插槽组件id+插槽组件生成事件id，确保id唯一且部分组件单独重新渲染也不会导致id无限增长