— React-Native Programmierer . Patrick Tresp

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haxe

First thing i needed to learn is to write externs.

Not all react-components that are available from scratch are ready-to-use with haxe-react-native (https://github.com/haxe-react/haxe-react-native).

For example to use the Button Component as described here: https://facebook.github.io/react-native/docs/button.html

you will get an Error Message similar to this:
Unknown identifier : Button

To use this Component as wanted, you will need do write an extern as documented here: https://haxe.org/manual/lf-externs.html

If you know what to to, just create a class in a packagename with identical name of the Component, you want to use:

com.packagemname.js.reactnative.Button

With following content:
package com.packagemname.js.reactnative;

@:jsRequire('react-native', 'Button')
extern class Button extends react.ReactComponent {}

Now you are all set to use this component by importing the extern

import de.superclass.js.reactnative.Button;

and use it:
var button = cast jsx(<Button key="unique-key" title="hey" onPress={_onPress}></Button>\');

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