25_ajax请求_使用fetch

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div id="example"></div>
<script type="text/javascript" src="../js/react.development.js"></script>
<script type="text/javascript" src="../js/react-dom.development.js"></script>
<script type="text/javascript" src="../js/babel.min.js"></script>
<script type="text/javascript" src="https://cdn.bootcss.com/axios/0.19.0-beta.1/axios.js"></script>
<script type="text/babel">
    /*
    * 需求：
    *    1.界面效果如下
    *    2.根据指定的关键字在github上搜索匹配的最受关注的库
    *    3.显示库名，点击链接查看库
    *    4.测试接口：https://api.github.com/search/repositories?q=r&sort=stars
    */
    class MostStarRepo extends React.Component {
        state = {
            repoName: '',
            repoUrl: ''
        }

        //在这里发送异步ajax请求
        componentDidMount() {
            //1.使用axios发送
            const url = `https://api.github.com/search/repositories?q=r&sort=stars`;
            //因为是promise风格的，所以后面可以使用.then()
            axios.get(url).then(response => {
                //数据就在response里面
                const result = response.data
                //使用解构得到想要的数据
                const {name, html_url} = result.items[0];
                //更新状态
                this.setState({repoName: name, repoUrl: html_url})
            }).catch((error) => {
                alert(error.message)
            })
            //2.使用fetch发送异步ajax请求
            /*fetch(url).then(response => {
                return response.json()//response.json()实际上是一个promise对象
            }).then(data => {
                //得到数据
                const {name, html_url} = data.items[0]
                //更新状态
                this.setState({repoName: name, repoUrl: html_url})
            })*/
        }

        render() {
            const {repoName, repoUrl} = this.state
            if (!repoName) {
                return <h2>LOADING......</h2>
            } else {
                return <h2>Most star repo is <a href={repoUrl}>{repoName}</a></h2>
            }
        }

    }

    ReactDOM.render(<MostStarRepo/>, document.getElementById('example'));
</script>
</body>
</html>
25_ajax请求_使用fetch

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