H5页面跳转小程序的3种实现方式

<template>
	<web-view src="https://www.xxx.cn/auth.html"></web-view>
</template>

<script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
<script type="text/javascript">
		let url = window.location.href;
		if(url.includes(code)) {
			if (wx.miniProgram) {
				wx.miniProgram.reLaunch({
					url: `/pages/home/index?code=${url中的code}&appId=${url中的appid}`,
					success: function() {
						......
					},
					fall: function() {
						......
					}
				})
			}
		} else {
			window.location.href = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=自己的appid&redirect_uri=还是当前页面&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect"
		}
	</script>

<div id="app">
		<wx-open-launch-weapp id="launch-btn" username="原始ID" path="赋值自己的path页面">
			<template>
				<button class="btn">跳转小程序</button>
			</template>
		</wx-open-launch-weapp>
	</div>
	<script src="https://res.wx.qq.com/open/js/jweixin-1.6.0.js"></script>
	<script type="text/javascript">
		let url = window.location.href;
		//如果url中包含code，说明授权成功，开始注册微信config
		if(url.includes(code)) {
			//通过接口拿到appId,nonceStr,signature,timestamp
			wx.config({
				debug: false,
				appId,
				timestamp,
				nonceStr,
				signature,
				jsApiList: ['chooseImage', 'previewImage'], //必写，否则不显示
				openTagList: ['wx-open-launch-weapp']//必写，否则不显示
			});
		} else {
			window.location.href = "https://open.weixin.qq.com/connect/oauth2/authorize?appid=自己的appid&redirect_uri=还是当前页面&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect"
		}
	</script>

 POST https://api.weixin.qq.com/wxa/generatescheme?access_token=ACCESS_TOKEN 

{
  "msg": "操作成功",
  "code": 200,
  "data": {
    "openlink": "weixin://dl/business/?t=WqDMv7uIy7g"
  }
}

<a href="weixin://dl/business/?t=WqDMv7uIy7g" rel="external nofollow" >跳转小程序</a>