How to use global variables in React Native?

Question

In React Native I want to use global variables when I am moving between different screens

Can anyone help me how to achieve it?

Answer 1

The global scope in React Native is variable global. Such as global.foo = foo, then you can use global.foo anywhere.

But do not abuse it! In my opinion, global scope may used to store the global config or something like that. Share variables between different views, as your description, you can choose many other solutions(use redux,flux or store them in a higher component), global scope is not a good choice.

A good practice to define global variable is to use a js file. For example global.js

global.foo = foo;
global.bar = bar;

Then, to make sure it is executed when project initialized. For example, import the file in index.js:

import './global.js'
// other code

Now, you can use the global variable anywhere, and don't need to import global.js in each file. Try not to modify them!