Sending prop and then using it as a function in React?

Question

I am trying to send a RouteKey prop and then trying to use the prop inside a chained function.

Here is my Component:

<MenuItem RouterKey={'assetsList'} />

And inside the component definition, I am trying to use it inside the actions function like so :

    import { Actions } from 'react-native-router-flux';
    const MenuItem = (props) => {
  return (
      <TouchableWithoutFeedback onPress={() => { return `${Actions}.${props.RouterKey}()`; }}>
        <View>
         //somethings here...
        </View>
      </TouchableWithoutFeedback>
  );
};

Basically what I want to do is:

<TouchableWithoutFeedback onPress={() => { Actions.whateverWasPassed(); }}>

However, I am not able to do this. What am I missing here? I know the way I am doing it is wrong. What is the correct way to do this?

Try return `${Actions}.${props.RouterKey}`();. Braces outside the backticks. If it doesn't work then you can also try `Actions[props.routerKey]()` — Hardik Modha, Mar 06 '17 at 17:35
Yup that worked!! Thanks... Write it as the answer, and I will accept it. :) — Sankalp Singha, Mar 06 '17 at 17:43

score 4 · Accepted Answer · edited May 23 '17 at 12:17

You can dynamically call any static method by ClassName[methodName](). It is particularly useful when you have method name as a string. (Just like your case).

So in your case, it will be

<TouchableWithoutFeedback onPress={() => { return Actions[props.RouterKey]();}}>

Another approach that you can follow is, you can directly pass Actions.assetsList method as a prop and invoke it in your MenuItem component.

<MenuItem scene={Actions.assetsList} />

Now, In your MenuItem component, you can invoke this method as props.scene(). Both the approach will work fine.

Here is the link to my answer on a similar question.

Sending prop and then using it as a function in React?

1 Answers1