Reactjs 解决axios请求后未更新组件状态
以下是我的代码片段:Reactjs 解决axios请求后未更新组件状态,reactjs,axios,state,Reactjs,Axios,State,以下是我的代码片段: import React, { Component } from "react"; import axios from "axios"; import PlanDetails from "./PlanDetails"; import Pagination from "./Pagination"; import PropTypes from "prop-types"; //ES6 class Planner extends React.Component { const
import React, { Component } from "react";
import axios from "axios";
import PlanDetails from "./PlanDetails";
import Pagination from "./Pagination";
import PropTypes from "prop-types"; //ES6
class Planner extends React.Component {
constructor(props) {
super(props);
this.state = {
destinations: [],
vacations: [],
itineraries: []
};
}
componentDidMount() {
const self = this;
axios
.get("sample.json")
.then(res => {
const data = res.data;
self.setState(data => {
destinations: data.destinations;
vacations: data.vacations;
itineraries: data.itineraries;
});
})
.catch(err => {});
}
render() {
return (
<div>
<h1>Planner</h1>
<PlanDetails />
<Pagination />
<ul>
{this.state.destinations.map(destination => (
<li key={destination.url}>{destination.text}</li>
))}
</ul>
</div>
);
}
}
Planner.propTypes = {};
export default Planner;
import React,{Component}来自“React”;
从“axios”导入axios;
从“/PlanDetails”导入PlanDetails;
从“/Pagination”导入分页;
从“道具类型”导入道具类型//ES6
类计划器扩展了React.Component{
建造师(道具){
超级(道具);
此.state={
目的地:[],
假期:[],
行程:[]
};
}
componentDidMount(){
const self=这个;
axios
.get(“sample.json”)
。然后(res=>{
常数数据=分辨率数据;
self.setState(数据=>{
目的地:数据目的地;
假期:数据。假期;
行程:数据。行程;
});
})
.catch(err=>{});
}
render(){
返回(
计划者
{this.state.destinations.map(destination=>(
- {destination.text}
))}
);
}
}
Planner.propTypes={};
导出默认计划器;
在上面的示例中,我试图在axios的帮助下从本地JSON获取值,并希望在planner组件的状态中更新响应。这不是反映
有没有新的方法来实现这一点?我是个新手。
setState
代码中的语法不正确。另外,您不需要self
,因为您正在为axios使用箭头函数。然后
回调将上下文绑定到封闭范围
this.setState({
destinations: data.destinations,
vacations: data.vacations,
itineraries: data.itineraries
});
您对javascript完全陌生吗?我很确定您应该使用逗号
,
而不是分号代码>在setState()中(
:)