WebView is not ready yet...

Nobody has claimed this yet.

I am using the following code:

```jsx
componentDidMount() {
try {
this.webView.current.executeJavaScript("$('body, window').scrollTop(100)")
} catch (err) {
console.log("[DidMount]", err.message);
}
setTimeout(() => {
this.webView.current.executeJavaScript("$('body, window').scrollTop(100)")
}, 1000);
}
```
This results in a message `[DidMount] WebView is not ready yet, you can't call this method` followed by a scroll after the timeout period.

I also tried `onDomReady` event handler which fires even earlier with the message `[DomReady] Cannot read property 'executeJavaScript' of null`.

What is the best method of invoking a method when the webview is ready?

Start with the componentDidMount and onDomReady examples in the issue, then trace the WebView lifecycle around executeJavaScript and the reported readiness errors. Reproduce the timing behavior and identify the documented lifecycle point for invoking methods; done means the invocation works without the timeout and avoids the null or not-ready errors.

Written by the indexing model from the issue text.