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applet
/
index.html

<html>

<head>
  <title>小程序转码</title>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1, maximum-scale=1">
  <script>
    window.onerror = e => {
      console.error(e)
      alert('发生错误' + e)
    }
  </script>
  <!-- weui 样式 -->
  <link rel="stylesheet" href="https://res.wx.qq.com/open/libs/weui/2.4.1/weui.min.css">
  </link>
  <!-- 调试用的移动端 console -->
  <!-- <script src="https://cdn.jsdelivr.net/npm/eruda"></script> -->
  <!-- <script>eruda.init();</script> -->
  <!-- 公众号 JSSDK -->
  <script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
  <!-- 云开发 Web SDK -->
  <script src="https://res.wx.qq.com/open/js/cloudbase/1.1.0/cloud.js"></script>
  <!-- ajax -->
  <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <!-- JS接收GET传值-->
  <script type="text/javascript">
    function getQueryString(name) {
      var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
      var r = window.location.search.substr(1).match(reg);
      if (r != null) return unescape(r[2]);
      return null;
    }
  </script>

  <script>
    function docReady(fn) {
      if (document.readyState === 'complete' || document.readyState === 'interactive') {
        fn()
      } else {
        document.addEventListener('DOMContentLoaded', fn);
      }
    }

    docReady(async function () {
      var ua = navigator.userAgent.toLowerCase()
      var isWXWork = ua.match(/wxwork/i) == 'wxwork'
      var isWeixin = !isWXWork && ua.match(/micromessenger/i) == 'micromessenger'
      var isMobile = false
      var isDesktop = false
      if (navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|IEMobile)/i)) {
        isMobile = true
      } else {
        isDesktop = true
      }

      if (isWeixin) {
        var containerEl = document.getElementById('wechat-web-container')
        containerEl.classList.remove('hidden')
        containerEl.classList.add('full', 'wechat-web-container')

        var launchBtn = document.getElementById('launch-btn')
        launchBtn.addEventListener('ready', function (e) {
          console.log('开放标签 ready')
        })
        launchBtn.addEventListener('launch', function (e) {
          console.log('开放标签 success')
        })
        launchBtn.addEventListener('error', function (e) {
          console.log('开放标签 fail', e.detail)
        })

        wx.config({
          // debug: true, // 调试时可开启
          appId: '这里放你自己的', // <!-- replace -->
          timestamp: 0, // 必填，填任意数字即可
          nonceStr: 'nonceStr', // 必填，填任意非空字符串即可
          signature: 'signature', // 必填，填任意非空字符串即可
          jsApiList: ['chooseImage'], // 必填，随意一个接口即可
          openTagList: ['wx-open-launch-weapp'], // 填入打开小程序的开放标签名
        })
      } else if (isDesktop) {
        // 在 pc 上则给提示引导到手机端打开
        var containerEl = document.getElementById('desktop-web-container')
        containerEl.classList.remove('hidden')
        containerEl.classList.add('full', 'desktop-web-container')
      } else {
        var containerEl = document.getElementById('public-web-container')
        containerEl.classList.remove('hidden')
        containerEl.classList.add('full', 'public-web-container')
        var c = new cloud.Cloud({
          // 必填，表示是未登录模式
          identityless: true,
          // 资源方 AppID
          resourceAppid: '这里放你自己的', // <!-- replace -->
          // 资源方环境 ID
          resourceEnv: '这里放你自己的', // <!-- replace -->
        })
        await c.init()
        window.c = c

        var buttonEl = document.getElementById('public-web-jump-button')
        var buttonLoadingEl = document.getElementById('public-web-jump-button-loading')
        try {
          await openWeapp(() => {
            buttonEl.classList.remove('weui-btn_loading')
            buttonLoadingEl.classList.add('hidden')
          })
        } catch (e) {
          buttonEl.classList.remove('weui-btn_loading')
          buttonLoadingEl.classList.add('hidden')
          throw e
        }
      }
    })
  </script>
  <style>
    .hidden {
      display: none;
    }

    .full {
      position: absolute;
      top: 0;
      bottom: 0;
      left: 0;
      right: 0;
    }

    .public-web-container {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .public-web-container p {
      position: absolute;
      top: 40%;
    }

    .public-web-container a {
      position: absolute;
      bottom: 40%;
    }

    .wechat-web-container {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .wechat-web-container p {
      position: absolute;
      top: 40%;
    }

    .wechat-web-container wx-open-launch-weapp {
      position: absolute;
      bottom: 40%;
      left: 0;
      right: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .desktop-web-container {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .desktop-web-container p {
      position: absolute;
      top: 40%;
    }
  </style>
</head>

<body>
  <div class="page full">
    <div id="public-web-container" class="hidden">
      <p class="">正在打开</p> <!-- replace -->
      <a id="public-web-jump-button" href="javascript:" class="weui-btn weui-btn_primary weui-btn_loading"
        onclick="openWeapp()">
        <span id="public-web-jump-button-loading" class="weui-primary-loading weui-primary-loading_transparent"><i
            class="weui-primary-loading__dot"></i></span>
            小程序转码
      </a>
    </div>
    <p style="width: auto; height: 45px; text-align: center; font-size: 17px; display: block; margin: 120px auto; color: red;" class="">小程序转码</p>
    <!-- replace -->
    <div id="wechat-web-container" class="hidden">
      <p class="">点击以下按钮打开</p> <!-- replace -->
      <!-- 跳转小程序的开放标签。文档 https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/Wechat_Open_Tag.html -->
      <wx-open-launch-weapp id="launch-btn" username="" path="">
        <!-- replace -->
        <template>
          <button
            style="width: 200px; height: 45px; text-align: center; font-size: 17px; display: block; margin: 0 auto; padding: 8px 24px; border: none; border-radius: 4px; background-color: #07c160; color:#fff;">打开小程序</button>
        </template>
      </wx-open-launch-weapp>
    </div>
    <div id="desktop-web-container" class="hidden">
      <p class="">请在手机打开网页链接</p>
    </div>
  </div>
</body>
<script>
  var url = window.location.href;
  var reg = /username=(.*?)\?path=/;
  var username = url.match(reg)[1];
  var reg2 = /path=(.*)/;
  var path = url.match(reg2)[1];
  document.getElementById('launch-btn').setAttribute('username', username);
  document.getElementById('launch-btn').setAttribute('path', path);
</script>


</html>