ZhangYang's Blog

【实战】js+Leancloud实现留言板

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简单的一个拥有数据库增删改查的留言板

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <!-- 存储服务 -->
    <script src="//cdn.jsdelivr.net/npm/leancloud-storage@3.15.0/dist/av-min.js"></script>
    <!-- 即时通讯服务 -->
    <script src="//cdn.jsdelivr.net/npm/leancloud-realtime@4.3.1/dist/realtime.browser.min.js"></script>
</head>
<body>
    <section id="message">
        <ul id="content"></ul>
        <form id="myForm">
            <label>姓名:<input type="text" name="name"></label>
            <label>留言:<input type="text" name="remark"></label>
            <input type="submit" value="提交">
        </form>
    </section>
    <script>
        // 初始化leancloud
        var APP_ID = 'baTF3mT0Ybt7NcGffQphNKDW-gzGzoHsz';
        var APP_KEY = '02G0rMK0z1bMwV1mvUhOIRpi';
        AV.init({
            appId: APP_ID,
            appKey: APP_KEY
        });
        // 提交获取数据
        myForm.addEventListener("submit", function (e) {
            e.preventDefault()
            var remark = document.querySelector("input[name='remark']").value
            var name = document.querySelector("input[name='name']").value
            var TestObject = AV.Object.extend('message')
            var testObject = new TestObject()
            testObject.save({
                remark:remark,
                name:name
            }).then(function (testObject) {
                var li = document.createElement("li")
                li.innerText = `${testObject.attributes.name}:${testObject.attributes.remark}`
                var ul = document.querySelector("#content")
                ul.appendChild(li)
                document.querySelector("input[name='remark']").value = ""
                document.querySelector("input[name='name']").value = ""
            })
        })
        // 获取所有数据
        var query = new AV.Query('message');
        query.find().then(function (remarks) {
            var aRemark = remarks.map(function(v){return v.attributes})
            aRemark.forEach(function(v){
                var li = document.createElement("li")
                li.innerText = `${v.name}:${v.remark}`
                var ul = document.querySelector("#content")
                ul.appendChild(li)
            });
        });
    </script>
</body>
</html>