JavaScript

Discover the various ways in JavaScript to inspect the content of an object (or any other value). JavaScript offers several methods to inspect the content of a variable. Specifically, let’s explore how to print the content of an object. The Console API console.log console.dir JSON.stringify() toSource() Iterating through properties using a loop How to inspect in Node.js Suppose we have the following object car, but we are uncertain about its content and wish to inspect it:...

In this blog post, we will discuss how to install React on your development computer. React is a powerful and popular JavaScript library used for building user interfaces. There are several ways to set up React, and we will cover the most common methods. Let’s get started! Load React Directly in the Web Page The simplest way to use React is by adding the React JavaScript file directly to your web page....

Iterating over an object’s properties is a common task in JavaScript. However, you can’t simply use methods like map(), forEach(), or a for..of loop to iterate over an object. Attempting to do so will result in errors. For example, if you have an object called items with properties like 'first', 'second', and 'third', using map() on items will throw a TypeError: items.map is not a function. Similarly, using forEach() or a for....

In modern JavaScript web development workflows, it’s common to install JavaScript via npm packages. However, there are situations where you may need to include an external JavaScript file, which can be a bit tricky with modern tools. In this blog post, we’ll explore how to include an external JavaScript file in a Gatsby site. The Challenge Let’s say we want to embed a video from Wistia in our Gatsby site. Wistia provides an HTML snippet to embed the video....

Learn how to merge two JavaScript objects and create a new object that combines their properties. Introduced in ES6 in 2015, the spread operator is a powerful way to merge two simple objects into one: const object1 = { name: 'Flavio' } const object2 = { age: 35 } const object3 = {...object1, ...object2 } If both objects contain a property with the same name, the second object’s property overwrites the first....

In Next.js, if you want to open a link in a new window, you can follow these steps: Wrap the a tag in a Link component provided by Next.js. Inside the a tag, add the target="_blank" attribute, just like you would in plain HTML. Here’s an example: <Link href={url}> <a target="_blank">Click this link</a> </Link> By wrapping the a tag in the Link component, you ensure that client-side routing works correctly. The href attribute is kept on the Link component....

In this blog post, we will explore how to parse JSON data in Node.js. Whether you have JSON data as a string or in a file, we will cover both scenarios. Parsing JSON from a String To parse JSON from a string in Node.js, you can use the JSON.parse method. This method is available in JavaScript since ECMAScript 5 and is provided by V8, the JavaScript engine that powers Node.js....

When writing JavaScript code, it is important to know the correct way to check if an object property is undefined. The most reliable method to accomplish this is by using the typeof operator. Let me guide you through the process with this easy explanation. To check if an object property is undefined, you simply utilize the typeof operator. This operator returns a string that represents the type of the given operand....

In JavaScript, there are multiple ways to redirect the user to a different web page. In this blog, we will explore the canonical way to achieve this and discuss other options available using plain JavaScript. Canonical Way to Redirect The most widely used method to navigate to a new URL is by setting the window.location property to the desired URL: window.location = 'https://newurl.com'; If you want to redirect to a different path on the same domain, you can use the window....

Save Disk Space by Deleting Unnecessary node_modules Folders Recently, I needed to transfer a folder filled with old projects to a new computer. When I tried compressing it, I was surprised to find that its size was a whopping 8GB. Quite excessive for simple coding projects that mainly consist of text files. Since all the projects were written in JavaScript, each one had a node_modules folder. However, these folders are completely unnecessary because they can be regeneratd by running npm install within each project....