微信公众号h5实现点击按钮跳转到小程序
作者：互联网
微信公众号h5实现点击按钮跳转到小程序，先决条件是小程序和公众号已进行关联。
1、登录微信公众平台-设置-关联设置 进行关联
2、登录微信公众平台-设置-基本设置-账号信息-原始ID 复制
3、代码如下
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>测试页</title>
<script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
<style>
* {
margin: 0;
padding: 0;
border: 0;
}
body {
width: 100%;
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
box-sizing: border-box;
padding: 0 28px;
}
.app {
text-align: center;
}
.app-info {
margin-bottom: 93px;
font-size: 24px;
}
.main {
color: #0072FF;
line-height: 45px;
letter-spacing: 2px;
}
.sub {
color: #263047;
letter-spacing: 1px;
}
.app-img {
width: 100%;
object-fit: contain;
}
.app-btn {
width: 247px;
line-height: 45px;
text-align: center;
background: #0072FF;
border-radius: 23px;
color: #FFFFFF;
font-size: 15px;
font-weight: bold;
margin: 130px auto 0;
user-select: none;
}
.hidden {
display: none;
}
</style>
</head>
<body>
<div id="app" class="app">
<div id="wechat-container">
</div>
</div>
<script>
function docReady(fn) {
if (document.readyState === 'complete' || document.readyState === 'interactive') {
fn()
} else {
document.addEventListener('DOMContentLoaded', fn);
}
}
docReady(async function () {
const ua = navigator.userAgent.toLowerCase(); // 浏览器ua识别类型
const isWXWork = ua.match(/wxwork/i) == 'wxwork'; // 判断是否有微信线程
const isWeixin = !isWXWork && ua.match(/micromessenger/i) == 'micromessenger'; // 是否是微信浏览器
// 判断是否是桌面浏览器
let isDesktop = false
if (!navigator.userAgent.match(
/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|IEMobile)/i)) {
isDesktop = true
}
if(isDesktop){
var cu = document.getElementById('wechat-container');
cu.innerHTML = '<div class="app-btn">请在手机微信里扫码访问</div>';
// alert("请用手机打开")
}else if(isWeixin){
getSignature();
} else {
var cu = document.getElementById('wechat-container');
cu.innerHTML = '<div class="app-btn">请在手机微信里扫码访问</div>';
// cu.innerText = '请在手机微信里扫码访问';
}
});
// 获取签名，必备步骤与后端配和
function getSignature() {
const url = 'XXX';
const xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.send();
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
const result = JSON.parse(xhr.responseText) || {};
if (result.code === 1) {
wx.config({
debug: false,
appId: , // 必填 公众号appid
timestamp: , // 必填，生成签名的时间戳
nonceStr: '', // 必填，生成签名的随机串
signature: , // 必填，签名
jsApiList: ['chooseImage'],
openTagList: ['wx-open-launch-weapp'],
})
wx.ready(()=>{
var cu = document.getElementById('wechat-container');
let id = getQueryVariable('id');
// 动态创建跳转按钮 username传入第二步复制的小程序原始ID path为需要跳转的小程序页面路径 scene为页面带的参数可在小程序页面进行获取
cu.innerHTML= `<wx-open-launch-weapp id="launch-btn" username="" path="/pages/index/index?scene=${id}">
<script type="text/wxtag-template">
<div
class="app-btn"
style="width: 247px;
line-height: 45px;
text-align: center;
background: #0072FF;
border-radius: 23px;
color: #FFFFFF;
font-size: 15px;
font-weight: bold;
margin: 130px auto 0;
user-select: none;">立即体验</div>
<\/script>
</wx-open-launch-weapp>`;
})
wx.error((error)=>{
// alert(JSON.stringify(error))
})
}
}
}
}
</script>
</body>
</html>
标签：const,微信,h5,xhr,跳转,document,cu 来源： https://www.cnblogs.com/shymi/p/16263548.html