It is possible to store data on the Android Webview Window Object at start with Capacitor/Ionic?

[distante]

I have some configuration variables that depend on which flavor the Android App is using, including some auth variables that are needed for the angular app start up.

I need to write some of that data into a global const in the window object, but I do not find any way to do it.

I have tried creating a Capacitor Plugin and calling

override fun load() {
    this.bridge.webView.evaluateJavascript("const __myTest = 'hello world'", null);
}

or with

override fun handleOnStart() {
  super.handleOnStart()
  this.bridge.webView.evaluateJavascript("const saninn = 'hello saninn'", null);
}

But even when that part is called, it does not set anything (probably the webview is not defined at that time)

Is this even possible? I do not want to define a plugin call because I would need to change all the initialization of the app and I am trying to prevent that.

I am assuming there should be a way to do this because at the start the Capacitor object already exists on window .

[jcesarmobile]

It should be possible, but you can't create it as a const if you want it to be available globally, should be an object on window object, something like window.saninn = 'hello saninn'

[distante]

Sadly no, it is still not defined at start :(

[jcesarmobile]

Looks like some threading issue, it works if you use this.bridge.eval("window.saninn = 'hello saninn';", null);, which runs evaluateJavascript under the hood, but on main thread.

[distante]

I will mark it as an answer, although I went in another route and loaded a Plugin with the flavor name as workaround.