Passing Arguments to Event Handlers using data-*
还没有人认领这个 Issue。
- 主要语言
- JavaScript
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描述
Currently the documentation https://reactjs.org/docs/handling-events.html mentions two ways how to handle events when the event handler function needs a parameter:
<button onClick={(e) => this.deleteRow(id, e)}>Delete Row</button>
<button onClick={this.deleteRow.bind(this, id)}>Delete Row</button>
As far as I understand, both variants create a new function on each render, which might lead to performance issues because of unnecessary re-renders (you might have to implement custom logic in shouldComponentUpdate). In the documentation:
We generally recommend binding in the constructor or using the class fields syntax, to avoid this sort of performance problem.
Not mentioned is using a "data'*" HTML attribute and then use that event property in the handler.
I would like to document this variant – or if it is not recommended, document that (and why) this is not recommended.
See also https://github.com/facebook/react/issues/1259
If you consider this worth documenting I will create a PR.
贡献指南
从这里开始
- 先读完整个 Issue,再读项目的贡献指南。
- 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
- Fork 仓库,在一个分支上完成修改。
- 提交 Pull Request,并在描述里引用这个 Issue 编号。
调研方向
从 handling-events 文档页面开始,查看向事件处理程序传递参数的两种现有模式,然后结合链接的 React issue 考虑所提出的 data-* 方案。完成的标准是页面明确推荐或拒绝这一变体,并解释原因。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- javascript, react
- 领域
- documentation
- Issue 类型
- 文档
- 难度
- 3/5
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- 1-2 天
- 活跃度
- 停滞
- 描述清晰度
- 需要澄清
- 新手友好度
- 35/100