Stop saving in cache memory Flutter web Firebase hosting

8
votes

I designed a web app using the Flutter web. I hosted it with Firebase host. But It's not showing changes of my code after deploying to firebase. It's still showing my older version of web app. But I can overcome this problem by clearing cache memory of browser or ctrl+refresh. But I don't want to do this every time I deploy to firebase. How to stop saving my web app in cache memory?

hosted link: https://frcovid19dashboard.web.app

2
firebaseflutterdartfirebase-hostingflutter-web
Thank you so much for your question, this is exactly what I was looking for. And the website is awesome like the progressive design and speed , really beautiful work. - basudev nayak

2 Answers

13
votes

Append a version number to your main.dart file. Every time you do changes that require the browser to clear cash, change the appended version number before you upload changes so the browser knows something has change and it needs to clear the cash. For example:

First Version:

<script src="main.dart.js?version=1" type="application/javascript"></script>

Next time you make changes:

<script src="main.dart.js?version=2" type="application/javascript"></script>

And so on. Check this link.

4
votes

Another approach would be to prevent caching via HTTP headers. For Firebase Hosting that would be : https://firebase.google.com/docs/hosting/full-config#headers

I guess you could set up something like this inside the site entry in your firebase.json:

"headers": [
  {
    "source": "**",
    "headers": [
      {
        "key": "Cache-Control",
        "value": "no-cache"
      }
    ]
  }
]