mini-prog/miniprogram/pages/webview-test/webview-test.wxml

<view class="webview-test-page">
  <view class="webview-test-page__loading" wx:if="{{!webViewReady}}">
    <view class="webview-test-page__title">H5 测试页加载中</view>
    <view class="webview-test-page__desc">{{webViewSrc}}</view>
  </view>
  <web-view
    wx:if="{{webViewReady && webViewSrc}}"
    src="{{webViewSrc}}"
    binderror="handleWebViewError"
  ></web-view>
</view>