webview-screenshot-comparison.uvue

<template>
  <web-view id="webview-screenshot" class="webview-screenshot" :webview-styles='webviewStyles' :src="src"
    @loaded="loaded" @error="error">
  </web-view>
</template>

<script>
  import { state } from '@/store/index.uts'

  export default {
    data() {
      return {
        baseSrc: '',
        src: '',
        webviewContext: null as WebviewContext | null,
        isLoaded: false,
        headerHeight: state.headerHeight,
        devicePixelRatio: state.devicePixelRatio,
        webviewStyles: {
          progress: false
        }
      }
    },
    onReady() {
      this.webviewContext = uni.createWebviewContext('webview-screenshot', this)
    },
    methods: {
      appendWebHeadPlaceholder() {
        if (this.src.indexOf('pages/template/navbar-lite/navbar-lite') > -1) {
          this.webviewContext?.evalJS(`
            const uniNavbar = document.querySelector('.uni-navbar');
            uniNavbar.style.paddingTop = '${state.headerHeight - 44}px';
          `)
        } else if (this.src.indexOf('pages/template/scroll-fold-nav/scroll-fold-nav') > -1) {
          this.webviewContext?.evalJS(`
            const heightSeat = document.querySelector('.height-seat');
            heightSeat.style.height = '125px';
            heightSeat.style.backgroundColor = '#f0f8ff';
            const topBox = document.querySelector('.top-box');
            topBox.style.top = '35px';
          `)
        } else {
          this.webviewContext?.evalJS(`
  const hasWebHeadPlaceholder = document.querySelector('.web-head-placeholder-for-screenshot-comparison');
  if (hasWebHeadPlaceholder) {
    return;
  }
  const webHeadPlaceholder = document.createElement('div');
  webHeadPlaceholder.style.height = '${state.headerHeight - 44}px';
  webHeadPlaceholder.style.backgroundColor = '#007aff';
  webHeadPlaceholder.classList.add('web-head-placeholder-for-screenshot-comparison');
  const uniPage = document.querySelector('uni-page');
  const uniPageHead = document.querySelector('uni-page-head');
  uniPage.insertBefore(webHeadPlaceholder, uniPageHead);
  `);
        }
      },
      loaded() {
        this.isLoaded = true
        this.appendWebHeadPlaceholder();
      },
      error(event : WebViewErrorEvent) {
        console.log('webview load error', JSON.stringify(event.detail));
      }
    }
  }
</script>
<style>
  .webview-screenshot {
    flex: 1;
  }
</style>