ieplus-app/src/preload.js

document.addEventListener('UniAppJSBridgeReady', function () {
  uni.webView.postMessage({
    data: {
      action: 'setPlatform'
    }
  });
  window.backup = (from) => {
    if (from === 'backbutton') {
      const routes = getCurrentPages();
      const route = routes[routes.length - 1].route;
      if ([
        'pagesMain/pages/index/index',
        'pagesMain/pages/volunteer/volunteer',
        'pagesMain/pages/me/me'
      ].includes(route)) {
        uni.webView.postMessage({
          data: {
            action: 'quit'
          }
        });
      } else {
        uni.navigateBack();
      }
    }
  };
  // 默认为h5平台
  window.platform = 'h5';
  window.setPlatform = (platform) => {
    window.platform = platform;
  };
});