我想从 json 文件中获取一些值并将它们呈现在多个组件中。这段代码似乎不起作用。请提出任何更改建议。范围可能存在一些问题。
var App = React.createClass({
getInitialState: function(){
return { myData: [] }
},
showResults: function(response){
this.setState(
{myData: response}
)
},
loadData: function(URL) {
$.ajax({
type: 'GET',
dataType: 'jsonp',
url: URL,
success: function(response){
this.showResults(response)
}.bind(this)
})
},
render: function(){
this.loadData("fileLocation/sample.json");
return(
<div>
{myData.key1}
<Component1 value={myData.key2} />
<Component2 value={myData.array[0].key3}/>
</div>
)
}
});
var Component1 = React.createClass({
render: function () {
return(
<div>{this.props.value}</div>
)
}
});
var Component2 = React.createClass({
render: function () {
return(
<div>{this.props.value}</div>
)
}
});
ReactDOM.render(<App/>, document.getElementById('content'));
这是我试图从中获取的sample.json 文件。即使这也显示语法错误
{
key1:"value1",
key2:"value2",
array: [
{key3:"value3"},
{key4:"value4"}
]
}
最佳答案
在 loadData
处正确调用 showResults
[1] :
var App = React.createClass({
getInitialState: function(){
return { myData: [] };
},
showResults: function(response){
this.setState({
myData: response
});
},
loadData: function(URL) {
var that = this;
$.ajax({
type: 'GET',
dataType: 'json',
url: URL,
success: function(response){
that.showResults(response);
}
})
},
将 loadData
从 render
移动到 componentDidMount
[2] ,并正确访问 myData
[3] :
componentDidMount: function() {
this.loadData("fileLocation/sample.json");
},
render: function(){
return(
<div>
{this.state.myData.key1}
<Component1 value={this.state.myData.key2} />
<Component2 value={this.state.myData.array[0].key3}/>
</div>
)
}
});
保持 Component1
和 Component2
不变:
var Component1 = React.createClass({
render: function () {
return(
<div>{this.props.value}</div>
)
}
});
var Component2 = React.createClass({
render: function () {
return(
<div>{this.props.value}</div>
)
}
});
ReactDOM.render(<App/>, document.getElementById('content'));
关于javascript - 在多个react.js组件中渲染json数据,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36983158/