1.進(jìn)頁(yè)面判斷環(huán)境

            let ua = window.navigator.userAgent.toLowerCase();
            
            if (ua.match(/Alipay/i) == "alipay") {
                //支付寶
                this.isBrowser = true;
            } else if (ua.match(/MicroMessenger/i) == "micromessenger") {
                //微信
                this.isBrowser = false;
            } else {
                //普通瀏覽器
                this.isBrowser = true;
            }

2.微信環(huán)境調(diào)用wx sdk

npm install weixin-js-sdk --save

import wx from 'weixin-js-sdk'

3.請(qǐng)求后端驗(yàn)簽得到配置參數(shù)

傳給后端當(dāng)前url進(jìn)行驗(yàn)簽，#號(hào)后的字符串不要

let url = window.location.href;
let newUrl = url.substring(0, url.indexOf('#'));

4.拿到參數(shù)后添加jsApiList和openTagList,配置wx-sdk環(huán)境

config.jsApiList = ['scanQRCode'];

config.openTagList = ['wx-open-launch-weapp'];

wx.config(config);

wx.ready(function() {
// config信息驗(yàn)證后會(huì)執(zhí)行ready方法，所有接口調(diào)用都必須在config接口獲得結(jié)果之后，config是一個(gè)客戶端的異步操作，所以如果需要在頁(yè)面加載時(shí)就調(diào)用相關(guān)接口，則須把相關(guān)接口放在ready函數(shù)中調(diào)用來(lái)確保正確執(zhí)行。對(duì)于用戶觸發(fā)時(shí)才調(diào)用的接口，則可以直接調(diào)用，不需要放在ready函數(shù)中
});

5.template里的html

            <wx-open-launch-weapp id="launch-btn" :username="username" :path="path">
                <script type="text/wxtag-template">
                    <style>
                        .open-btn {
                            margin-top: 100px;
                            background-color: #4CAF50;
                            border: none;
                            color: white;
                            text-align: center;
                            text-decoration: none;
                            font-size: 16px;
                            border-radius: 15px;
                            width: 200px;
                            height: 50px;
                            line-height: 50px;
                        }
                    </style>
                    <button class="open-btn">打開小程序</button>
                        </script>
            </wx-open-launch-weapp>

username:小程序初始ID，要去小程序平臺(tái)找
path：跳轉(zhuǎn)路徑，根據(jù)當(dāng)前href判斷跳轉(zhuǎn)路徑