When working with Node and Express.js, there might be cases where you need to access req.query, an object that contains the property for each query string parameter in the route. For example, given a route like…

This quick article shows you 2 different approaches to merging 2 or more objects in TypeScript. Without any further ado, let’s get our hands dirty. Using the spread operator There are some important things you need…

This short and straightforward article shows you a couple of different ways to extend a type in TypeScript. Without any further ado, let’s see the code. Using the “extends” keyword Example: Using the “&” operator Example:…

This succinct, practical article walks you through a complete example of using the window.setTimeout() and window.clearTimeout() methods in a React application that is written in TypeScript. We’ll use functional components with hooks (useState, useEffect, and useRef)….

This practical article walks you through a complete example of using the window.setInterval() method in combination with hooks (useState, useEffect, and useRef) in a React application that is written in TypeScript. No more rambling; let’s unveil…

In TypeScript, a tuple is a specific type of array which has the following characteristics: The number and order of elements are fixed and must be adhered The type of each element is predefined and strict…

When working with Javascript and TypeScript, arbitrary use of single quotes and double quotes may not cause errors but will result in a lack of consistency and readability. Therefore, choosing and going with a certain quote…

In TypeScript, you can specify that some or all properties of an object are optional. To do so, just add a question mark (?) after the property name. Example: Output: Further reading: TypeScript: Using Variables to…

There might be cases where you want to use a variable as a dynamic key of an object in TypeScript. The following examples will show you how to do that. Example 1 Output: Example 2 Output:…

In TypeScript, you can use the spread operator (…) as the final parameter of a function. All of the arguments (except the ones that were explicitly declared before the three dots) passed to that function will…

In TypeScript, a function can have optional and default parameters. In order to make a parameter optional, we can postfix it with a question mark (?). We can provide a default value to a parameter by…

This short article shows you how to calculate the variance and standard deviation of a given array of numbers. You will see the code in vanilla Javascript and TypeScript. Javascript Output: TypeScript If you use TypeScript…