Call JavaScript function from native code

Question

I have a react-native app and want to integrate it with native SDK. At some point I need to call js function which will return me data, and this call I should make from native side. Here is the flow:

some iOS handler require more info
native layer calls js code
js code calculate/fetch required data
js code return data back to native code
native code receive data and continue working

Is it possible? There is a lib react-native-eval but may be there is more elegant way to do this?

Have a look at [Callbacks](https://facebook.github.io/react-native/docs/native-modules-ios.html#callbacks) or [Sending Events to JavaScript](https://facebook.github.io/react-native/docs/native-modules-ios.html#sending-events-to-javascript) — Dheeraj Vepakomma, Oct 14 '17 at 10:18
Thanks @DheerajV.S. but both of them are work in order to deliver data or notify react-native from native layer. I need to pass data in reverse order — Alexei Malashkevich, Oct 14 '17 at 11:23
Hi, @Alexei Malashkevich did you find any solution for this? I am also stuck in this. — Ashish Singhal, Apr 17 '19 at 10:29

score 3 · Accepted Answer · edited Aug 08 '19 at 13:56

3

There is currently no clean way of doing this. My suggestion would be to use either a Callback or an Event from native to JS to notify that there is some information needed and to then invoke a function from JS to the native code that gives the required data to the native layer.

edited Aug 08 '19 at 13:56

Peterdeka

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answered Oct 23 '17 at 09:35

Daniel Schmidt

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Call JavaScript function from native code

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