整个错误:
"Warning: Each child in an array or iterator should have a unique \"key\" prop. Check the render method of RenderArray"
代码:
/* jshint esnext: true */
class RenderArray extends React.Component {
constructor() {
super();
this.state = {myArray : ""};
}
componentDidMount() {
console.log(this.state.myArray);
}
componentWillMount () {
this.setState({
myArray: ['one', 'two', 'three', 'four', 'five']
});
}
render () {
showEl = this.state.myArray.map(function(i) {
return <li>{i}</li>;
})
return (
<div className="jumbotron container">
<ul>
{showEl}
</ul>
</div>
);
}
};
建议？
最佳答案
对于每个重复的元素，react 需要一个唯一的键。因此，就您而言，类似于:
showEl = this.state.myArray.map(function(i) {
return <li key={i}>{i}</li>;
})
关于javascript - React/JSX 错误 : Any use of a keyed object should be wrapped in React. 插件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37601466/