All flutter web apps are broken-CodePudding

Several projects we've written in Flutter are broken this morning due to failing to download https://unpkg.com/[email protected]/bin/canvaskit.js. Production sites aren't getting paste their splash screens.

CodePudding user response：

We got our sites going again by deploying them again passing argument to tell it to get the cansvaskit locally: flutter build web --dart-define=FLUTTER_WEB_CANVASKIT_URL=OURBASEURL/canvaskit/

CodePudding user response：

It also appears as though the original issue is resolved at unpkg.com.

CodePudding user response：

A little earlier unpkg was down. It looks like it is back up now, but with a CORS policy that is not allowing it to be downloaded from other sites (other sites running Flutter).

I was able to resolve by switching to the HTML renderer in web/index.html:

  <script type="text/javascript">
        window.flutterWebRenderer = "html";
    //window.flutterWebRenderer = "canvaskit";
  </script>

You can also specify the canvaskit url: pass --dart-define=FLUTTER_WEB_CANVASKIT_URL=... and host your own copy of CanvasKit at the URL specified in the --dart-define.

To use the jsdelivr CDN, use the command:

flutter build web --dart-define=FLUTTER_WEB_CANVASKIT_URL=https://cdn.jsdelivr.net/npm/[email protected]/bin/canvaskit.wasm