ReactJS教程在url属性处卡住
我当前的index.html,并且被困在externalise json文件中:ReactJS教程在url属性处卡住,reactjs,Reactjs,我当前的index.html,并且被困在externalise json文件中: <html> <head> <title>Hello React</title> <script src="https://fb.me/react-0.13.2.js"></script> <script src="https://fb.me/JSXTransformer-0.13.2.js"></
<html>
<head>
<title>Hello React</title>
<script src="https://fb.me/react-0.13.2.js"></script>
<script src="https://fb.me/JSXTransformer-0.13.2.js"></script>
<script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/marked/0.3.2/marked.min.js"></script>
</head>
<body>
<div id="content"></div>
<script type="text/jsx">
var Comment = React.createClass({
render: function(){
return (
<div className="comment">
<h2 className="commentAuthor">
{this.props.author}
</h2>
<span dangerouslySetInnerHTML={{__html:marked(this.props.children.toString(), {sanitize:true})}} />
</div>
);
}
});
var CommentList = React.createClass({
render: function(){
return (
<div className="commentList">
{
this.props.data.map(function (comment) {
return(
<Comment author={comment.author}>
{comment.text}
</Comment>
);
})
}
</div>
);
}
});
var CommentForm = React.createClass({
render: function(){
return (
<div className="commentForm">
Hello, world! I am a CommentForm
</div>
);
}
});
var CommentBox = React.createClass({
render: function(){
return (
<div className="commentBox">
<h1>Comments</h1>
<CommentList data={this.props.data} />
<CommentForm />
</div>
);
}
});
React.render(
<CommentBox url="comments.json" />,
document.getElementById('content')
);
</script>
</body>
</html>
Console抱怨
此.props.data
未定义,查看服务器访问日志,它没有加载comments.json
文件您缺少加载注释的代码。如果在教程中向下滚动一点,您将看到可以将以下代码添加到注释框组件:
var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentDidMount: function() {
$.ajax({
url: this.props.url,
dataType: 'json',
cache: false,
success: function(data) {
this.setState({data: data});
}.bind(this),
error: function(xhr, status, err) {
console.error(this.props.url, status, err.toString());
}.bind(this)
});
},
render: function() {
return (
<div className="commentBox">
<h1>Comments</h1>
<CommentList data={this.state.data} />
<CommentForm />
</div>
);
}
});
var CommentBox=React.createClass({
getInitialState:函数(){
返回{data:[]};
},
componentDidMount:function(){
$.ajax({
url:this.props.url,
数据类型:“json”,
cache:false,
成功:功能(数据){
this.setState({data:data});
}.绑定(此),
错误:函数(xhr、状态、错误){
console.error(this.props.url,status,err.toString());
}.绑定(此)
});
},
render:function(){
返回(
评论
);
}
});
React只是视图层。您需要编写代码来检索comments.json
。仅仅将url
作为属性是不够的。@Brennan,除非我读到的文档模棱两可,否则会触发从注释中读取。jsonScroll向下一点:)就是它们显示该属性的实际功能的地方。哦,哈哈,这太误导人了……我明白了,我指责文件有误导性:)我不反对。
var CommentBox = React.createClass({
getInitialState: function() {
return {data: []};
},
componentDidMount: function() {
$.ajax({
url: this.props.url,
dataType: 'json',
cache: false,
success: function(data) {
this.setState({data: data});
}.bind(this),
error: function(xhr, status, err) {
console.error(this.props.url, status, err.toString());
}.bind(this)
});
},
render: function() {
return (
<div className="commentBox">
<h1>Comments</h1>
<CommentList data={this.state.data} />
<CommentForm />
</div>
);
}
});