Filtering in JavaScript lets me keep what I want from an array and discard the rest. Think of it like separating clean water from the impurities. The idea is simple: keep elements that satisfy a condition and throw away the ones that do not. A filter method is used to create a new array by … Read more
I am going to show how to use reduce in JavaScript. We will understand how to reduce a big array into a single value using the reduce function. It is like reducing a long list of numbers into just their sum or their product. The reduce method is used to reduce an array into a … Read more
I am going to explain how to use session storage in JavaScript. Session storage is very similar to local storage, but the only difference is that it stores the data temporary, not permanent. We will understand how session storage works and how to set data and use data using session storage. Session storage is a … Read more
JavaScript modules allow you to split code into reusable files, and then you can simply import and export them whenever you need. Here is how JavaScript ES6 Modules work step by step. JavaScript ES6 Modules basics Create a new file named data.js. One more thing you need to remember is that when you … Read more
Local storage is basically a browser feature that allow you to store your data permanently. The data you store is in the form of key value pairs and it remains even after the page is reloaded or the browser is closed. It is a part of the _Web Storage API_ that allow a website to … Read more
We are going to learn about JavaScript Call, Apply, Bind and how they help control the this keyword inside a function. We will see how each one works step by step, with simple examples you can run in the console. Read More: switch case Controlling this with JavaScript Call, Apply, Bind The goal … Read more
The JavaScript ternary operator is a shortcut for writing an if-else statement in a single line. Earlier you may have written a full if-else block to choose between two expressions. With the ternary operator, you write a compact expression that reads cleanly and returns a value you can store or print. JavaScript Ternary Operator syntax … Read more
Converting strings to numbers and numbers to strings in JavaScript is straightforward. I’ll show every method I use, explain what each one does, and when to pick one over the other. You’ll see four different ways to turn a string into a number, and two ways to turn a number into a string. String to … Read more
Getting the current date and time in JavaScript is easy. You can generate the current date and time using the inbuilt `Date` function automatically. It gives you the current date and time based on your computer or your device setting. Basics – JavaScript Date Object First understand the basic syntax by which we … Read more
Here we learn how to check if a value is defined or null in JavaScript, and how equality works with these values. JavaScript Null vs Undefined Definitions What is undefined? The undefined is a variable that is declared but not assigned any value yet. It means you declare a variable but you have … Read more