javascript ReactJs：是否可以按类名将 DOM 渲染为文档？
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ReactJs: Is it possible to render DOM to document by class name?
提问by Waleed Ahmad
I'm learning ReactJs and really like it. I wanted to ask if we can render virtual DOM to document by class name.
我正在学习 ReactJs 并且非常喜欢它。我想问一下我们是否可以按类名将虚拟 DOM 渲染到文档。
React.render(
<CommentBox url="data/comments.json" pollInterval={2000} />,
document.getElementById('class')
);
I tried to pass
我试图通过
getElementByClassName('class')
getElementByClassName('class')
as second argument to react's render method and it doesn't work. Does React only render DOM to nodes with ID's only or is there's a workaround to use nodes with classes too?
作为 react 的 render 方法的第二个参数，它不起作用。React 是否只将 DOM 渲染到只有 ID 的节点，还是有一种解决方法也可以将节点与类一起使用？
回答by xcatliu
It seems you have used a wrong method.
看来您使用了错误的方法。
Probably you should use getElementsByClassNameinstead of getElementByClassName. And DO NOT forget getElementsByClassNamereturns an array-like obj HTMLCollection, so picking the first element is necessary.
可能你应该使用getElementsByClassName而不是getElementByClassName. 并且不要忘记getElementsByClassName返回一个类似数组的 obj HTMLCollection，所以选择第一个元素是必要的。
React.render(
<CommentBox url="data/comments.json" pollInterval={2000} />,
document.getElementsByClassName('className')[0]
);
For more infomation, check out the docs.
有关更多信息，请查看文档。
