Global Variables in React component

Can we declare variables outside React component?

Yes, in React, you can declare variables outside of components. However, these variables will typically be in the scope of the file in which they are declared rather than being associated with any specific component. This is useful for storing data or values that are used across multiple components within the same file.

Here's an example:

// Outside component variable declaration
const globalVariable = 'I am global!';

function MyComponent() {
// Inside component usage of global variable
return 
{globalVariable}
;
}

export default MyComponent;

In this example, 'globalVariable' is declared outside of the 'MyComponent' function and can be accessed inside the component. However, it's important to note that using global variables like this can sometimes lead to unexpected behavior or make your code harder to reason about, especially as your application grows. So, it's generally a good practice to use props and state to manage data within React components whenever possible.