informationcollection/main.js

// #ifndef VUE3
import Vue from 'vue'
import App from './App'

Vue.config.productionTip = false

App.mpType = 'app'

const app = new Vue({
    ...App
})
app.$mount()
// #endif

// #ifdef VUE3
import { createSSRApp } from 'vue'
import App from './App.vue'
export function createApp() {
  const app = createSSRApp(App)
  return {
    app
  }
}
// #endif

Vue.mixin({
    mounted() {
        if (this.isWeiXinBrowser() || this.isQQBrowser()) {
            this.navTitle()
        }
    },
    methods: {
        isWeiXinBrowser() {
            let ua = navigator.userAgent.toLowerCase()
            return ua.indexOf('micromessenger') != -1
        },
        isQQBrowser() {
            var ua = navigator.userAgent.toLowerCase()
            if (ua.match(/QQ/i) == "qq") {
                return true
            } else {
                return false
            }
        },
        navTitle() {
            this.$nextTick(() => {
                let navTitleDom = document.getElementsByTagName('uni-page-head')
                if (navTitleDom.length) {
                    navTitleDom[0].style.display = 'none'
                }
            })
        }
    }
})