I have a webview as tab A and a todolist flatlist on tab B. If the user adds an entry to the flatlist on tab B, i want the tab A webview to refresh.
I couldn't find any .refresh() or reload() methods on the webview control https://facebook.github.io/react-native/docs/webview.html
Any ideas how to accomplish this?
You can set a key to the webview
key={this.state.key}
and then you can reload it by updating the state
this.setState({ key: this.state.key + 1 });
Well I reload WebView by doing following:
render() {
let WebViewRef;
return (
<View style={Style1.container}>
<WebView
ref={WEBVIEW_REF => (WebViewRef = WEBVIEW_REF)}
source={{ uri: this.state.site }}
renderLoading={this.ActivityIndicatorLoadingView}
startInLoadingState={true}
/>
<Button title="Reload Me!" onpress={() => { WebViewRef && WebViewRef.reload(); }} />
</View>
)
}
In this code I Declare Reference Variable WebViewRef first then assign this to WebView as ref={WEBVIEW_REF => (WebViewRef = WEBVIEW_REF)} and then call this reference for reload() as ()=>{ WebViewRef && WebViewRef.reload();}
The react-native-community/react-native-webview component has a .reload() method on the ref.
const webViewRef = useRef();
// ...
return (
<WebView ref={(ref) => webViewRef.current = ref} ... />
)
// ...
You can then use the following to reload:
webViewRef.current.reload();
Reload was not working on my end.
If you want to refresh on focus change you can use the hook useFocusEffect of react navigation and in the unmount clean the URL used in the webview. Then in the initialize you need to set that again. Maybe using a a useState.
useFocusEffect(
useCallback(() => {
setUrl(url!);
return () => {
setUrl(undefined);
};
}, [url]),
);
I ended up using a dummy query parameter to signal a refresh of the web view:
In Tab B, I dispatch a change which changes "latestItemId" in the global state.
In Tab A, I use mapStateToProps which maps to <WebView source={{uri:URL?latestItemId=${latestItemId}}} /> in the render method. This causes it to think it's a new url and reload it.
In my case I have source={{html}} so refresh() won't work in that situation. However, in my case I am still able to inject javascript so I can set some properties specifically document.styles.body.color to match dark and light mode.
const fg = colorScheme === "light" ? "black" : "white";
const webViewRef = createRef<WebView>();
useEffect(() => {
webViewRef.current?.injectJavaScript(`
document.body.style.color='${fg}';
true
`);
}, [fg]);
...
<WebView
ref={webViewRef}
originWhitelist={["*"]}
style={{
height: 200,
backgroundColor: "transparent",
}}
onMessage={() => {}}
javaScriptEnabled={true}
injectedJavaScript={`
document.body.style.color='${fg}';
true;`}
source={{ html }}
/>
webViewRef.current.injectJavaScript('window.location.reload(true)');
I found this solution from this github thread and it seems to work for me:
https://github.com/react-native-webview/react-native-webview/issues/2918#issuecomment-1521892496
