Global constant in React JS

It has a global scope means it holds its value throughout the lifetime of the program . Hence, it can be accessed throughout the program by any function defined within the program, unless it is shadowed. Example: int a =4; int b=5; public int add(){ return a+b; } Here, ‘a’ and ‘b’ are global variables.

There are three different ways to classify global variables: by the ownership of the variable, by the scope of the value, and by the method used to maintain the value .

First, go to your App. js file and wrap all the components you want to access the context . All child components will automatically inherit the context. This way, you can globally set and get variables in whatever component you need.

Create a Global Variable to Use in Multiple Functions in React. When multiple functions need to access the data or write to an object, global variables are used .