Helper Function with argument called before component mount in React Native

Question

I\'m testing that my express server is running in React Native by calling a simple helper function in my component.

This is the helper function:

//Helpe         


        

Answer 1

That's because you invoked it immediately in the template.

Replace

<Button title="Test Fetch" onPress={this.testFetch('Here I am')} />

To

<Button title="Test Fetch" onPress={() => this.testFetch('Here I am')} />

Read more about it here https://reactjs.org/docs/faq-functions.html