godbasin / godbasin/godbasin.github.io
关于小程序 setData
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- Dominant language
- HTML
- Stars
- 2.2k
- Forks
- 294
- PR merge metrics
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Description
你好。我先描述下背景吧。
我还没正经开发过小程序，最近在做相关工作（封装一个小程序框架）
比如有这样一个业务场景，一个页面里有一个组件，页面监听了某个子组件的事件，在回调里setData了，而这个子组件因为监听了生命周期或者UI事件也setData了，并 trigger 了页面监听的这个事件。我想了解一下这个过程到底是怎样的？
- 是否会引发两次渲染？
- trigger 是同步还是异步的？理论上同步的可能性比较大
不太清楚 setData 到 webview 那边的通信时间和内部放置的队列情况，不过应该是宏队列，但是浏览器本身也对宏队列做了优化（比如连续在 setTimeout 0 操作 dom，不论是重绘还是重排，浏览器也会有自己的一套 isNeedRender 的算法优化）
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No file, test, or implementation entry point is named. Start by locating the mini-program framework's setData and trigger handling, then trace their ordering and WebView communication. Done would require a clear explanation of whether the scenario causes multiple renders and whether trigger is synchronous or asynchronous.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- frontend
- Issue type
- Documentation
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 20/100