如何在React组件的渲染方法中使用注释?
我有以下组件:
'use strict';
var React = require('react'),
Button = require('./button'),
UnorderedList = require('./unordered-list');
class Dropdown extends React.Component{
constructor(props) {
super(props);
}
handleClick() {
alert('I am click here');
}
render() {
return (
<div className="dropdown">
// whenClicked is a property not an event, per se.
<Button whenClicked={this.handleClick} className="btn-default" title={this.props.title} subTitleClassName="caret"></Button>
<UnorderedList />
</div>
)
}
}
module.exports = Dropdown;
我的评论显示在UI中。
在组件的呈现方法中应用单行和多行注释的正确方法是什么?
另一方面，下面是一个有效的注释，直接从一个工作的应用程序:
render () {
return <DeleteResourceButton
// Confirm
onDelete = {this.onDelete.bind(this)}
message = "This file will be deleted from the server."
/>
}
显然，在JSX元素的尖括号内，//语法是有效的，但{/**/}是无效的。以下是休息时间:
render () {
return <DeleteResourceButton
{/* Confirm */}
onDelete = {this.onDelete.bind(this)}
message = "This file will be deleted from the server."
/>
}
总而言之，JSX不支持注释，无论是类似html的还是类似js的:
<div>
/* This will be rendered as text */
// as well as this
<!-- While this will cause compilation failure -->
</div>
在JSX中添加注释的唯一方法实际上是逃到JS中并在那里添加注释:
<div>
{/* This won't be rendered */}
{// just be sure that your closing bracket is out of comment
}
</div>
如果你不想做些无聊的事
<div style={{display:'none'}}>
actually, there are other stupid ways to add "comments"
but cluttering your DOM is not a good idea
</div>
最后，如果你确实想通过React创建一个注释节点，你必须更加花哨，看看这个答案。
