How to Check if String is Empty in TypeScript - Step by Step Examples

How to Check if String is Empty in TypeScript ?

To check if a string is empty in TypeScript, you can use the length property of the String object.

In this example,

We declare a variable named str1 with an empty string value "".
We use the length property on str1 to check if it is empty.
The length property returns the number of characters in the string, so if it is 0, the string is empty.
Finally, we print the result to the console.

let str1: string = "";
let isEmpty: boolean = str1.length === 0;
console.log("Is string empty: " + isEmpty);

Is string empty: true

In this example,

We declare a variable named str2 with a non-empty string value "Hello World".
We use the length property on str2 to check if it is empty.
The length property returns the number of characters in the string, so if it is 0, the string is empty.
Finally, we print the result to the console.

let str2: string = "Hello World";
let isEmpty: boolean = str2.length === 0;
console.log("Is string empty: " + isEmpty);

Is string empty: false

In this tutorial, we learned How to Check if String is Empty in TypeScript language with well detailed examples.