81 lines
1.7 KiB
HTML
81 lines
1.7 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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</head>
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<body>
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<button id="btn">按钮</button>
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<div id="app">
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</div>
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<!-- api文档地址
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https://api.zzhitong.com/help
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-->
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<script>
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document.querySelector("#btn").onclick = function () {
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console.log("点我了");
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}
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// 表单提交 页面刷新
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// 资源重新加载
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// 页面信息没了
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// Ajax
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// 页面资源的局部数据更改
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// 页面无状态发送并接收数据
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// https://api.zzhitong.com/ip 获取ip地址的api
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// Ajax对象
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let xhr = new XMLHttpRequest();
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console.log(xhr);
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// 请求的基本配置
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xhr.open("GET", "https://api.zzhitong.com/ip", true);
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// 请求配置完成
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xhr.send();
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// 请求状态
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xhr.onreadystatechange = () => {
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// xhr.readyState
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// 0 未初始化
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// 1 服务器以建立连接
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// 2 请求已被接受
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// 3 请求处理中
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// 4 请求完成 响应就绪
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// console.log(xhr);
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if (xhr.readyState === 4) {
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let data = JSON.parse(xhr.response);
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console.log(data);
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document.querySelector("#app").innerHTML = `
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<h1>ip:${data.number_ip.ip.key} 地址: ${data.number_ip.ip.location}</h1>
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`
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}
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};
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</script>
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</body>
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</html>
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