How to Check a Variable is Undefined in React Native?

Dec 09, 2022 . Admin

In this tutorial, I will show you react native check if variable is undefined. you can understand a concept of how to check undefined in react native. We will look at example of how to check undefined value in react native. you'll learn how to check if a variable is undefined in react native.

In this example, Typeof returns data type, that is whether the variable is “undefined”, “object”, “boolean”, “string”, “number”, “function” etc. Hence you can use typeof to check undefined variable as given below:

if (Variable === 'undefined'){
//the variable is undefined
} else {
//the variable is not undefined
}

It will help you...

#React Native