Cannot load Javascript on some Android devices - Uncaught TypeError: Cannot read property 'appendChild' of null

[koteesy]

After update on last version of library (5.3.2) some of our users start experience problems with loading webview pages.

On our devices which we are test, we successfully pass all tests, but some of real user devices has this bug.

In onloadStop hook, we call injectJavascriptFileFromUrl and on some devices, page cannot load fully, looks like it crash on 50% of load, we get one of users, start debugging with chrome devTools and teamViewer, and see this picture:

Webview start loading successfully, but after this javascript thrown error:

Uncaught TypeError: Cannot read property 'appendChild' of null

We going deep, and find which js exactly throw this error, and see there's this piece of code:

flutter_inappwebview/android/src/main/java/com/pichillilorenzo/flutter_inappwebview/in_app_webview/InAppWebView.java

Line 1065 in f06bcdf

" script.src = %s; d.body.appendChild(script); })(document);";

which throw this error, look's like he's trying to append node when document is loading and it has no body.

Devices(Android): Honor c7, Redmi 6

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👋 @koteesy

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