测试

mTest/index.js

@@ -15,7 +15,6 @@ const addBtn = document.querySelector('.add-button');
 addBtn.style.display = 'none';
 
 window.addEventListener('beforeinstallprompt', (e) => {
-  setTimeout(function() {
       // Prevent Chrome 67 and earlier from automatically showing the prompt
       e.preventDefault();
       // Stash the event so it can be triggered later.
@@ -38,6 +37,4 @@ window.addEventListener('beforeinstallprompt', (e) => {
           deferredPrompt = null;
         });
       });
-  }, 5000);
-
 });
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