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Tags: State Machines, Finite State Machines, Traffic Lights, Modeling, State Transitions Finite State Machines (FSMs) are a key concept in computer science, and they have become increasingly popular in the world of JavaScript development. One notable library, XState, has gained a lot of attention and praise in recent times. As a senior developer, I believe it is crucial to understand FSMs and their practical applications in frontend engineering. At a high level, a state machine is a system that can be in one of several predefined states at any given time....

In a recent project, I encountered an issue while trying to upload files along with other form fields using the Fetch API in React. The code looked something like this: <form encType="multipart/form-data" action="/api/post" method="POST" onSubmit={async (e) => { e.preventDefault(); if (!title) { alert('Enter a title'); return; } if (!content && !image) { alert('Enter some text in the post'); return; } const body = new FormData(); body.append('image', image); body.append('title', title); body.append('content', content); const res = await fetch('/api/post', { body, method: 'POST', headers: { 'Content-Type': 'multipart/form-data', }, }); }} > {/* Form fields */} </form> The problem I faced was that the file data was not being sent to the server properly....

I encountered a problem while working on a project that involved a React form and how browser autofill interacts with it. Browser autofill automatically populates username/password fields when you have previously entered the information. This was causing an issue for me. Specifically, I observed this problem on Chrome and Firefox, but it could potentially occur on any browser. The form was a basic form built with the useState hook. Here’s an example of the email field:...

Are you encountering an issue when installing npm packages? Don’t worry, you’re not alone. This problem can occur due to the behavior of npm when installing a package in an empty folder. In this blog, we’ll discuss the issue and provide solutions to fix it. When using the command npm install <packagename> in an empty folder, npm creates a package.json file with the package as a dependency, a package-lock.json file, and installs the package in the node_modules folder....

If you’re encountering the psql: error: could not connect to server error in PostgreSQL, don’t worry. This issue can often be resolved by following a few simple steps. Here’s how you can fix it: Uninstall PostgreSQL: If you suspect that the problem is due to a faulty installation or upgrade, you can start by uninstalling PostgreSQL. To do this using Homebrew, run the following command in your terminal: brew uninstall postgresql Reinstall PostgreSQL: After uninstalling PostgreSQL, you can proceed with reinstalling it....

Prettier is an opinionated code formatter that helps you maintain consistent code formatting across your team. It supports various languages and integrates with popular code editors. In this article, we will explore the features of Prettier and how it can benefit developers of all levels. Introduction to Prettier Prettier is a code formatter that automatically formats your code according to predefined rules. It supports a wide range of syntax, including JavaScript, TypeScript, CSS, SCSS, Less, JSX, GraphQL, JSON, and Markdown....

In Go, functions play a crucial role in structuring your code. They are blocks of code that have a specific name and contain a set of instructions. Understanding how to use functions effectively can greatly enhance your programming experience. In this article, we’ll explore the different aspects of functions in Go and how you can use them to your advantage. Defining Functions in Go Let’s start with the basics. In Go, functions are typically defined with a custom name....

Generating a random number within a specified range is a common task in JavaScript. In this blog post, we will explore a simple and efficient method to accomplish this using the Math.floor() and Math.random() functions. Method To generate a random number between two given numbers, we can use the formula: Math.floor(Math.random() * (max - min + 1)) + min; In the above formula, max represents the maximum number in the range, while min represents the minimum number....

How to Create an Array of 5000 Unique Strings in JavaScript While working on my online course platform, I faced the challenge of generating thousands of unique URLs. Each person taking the course needed to be assigned a unique URL, which would be associated with their purchase email. By having a separate URL for each person, I could eliminate the need for a login system and prevent abuse if a URL was unintentionally or intentionally shared with the public....

As a product business, the value you create with every shipped product is crucial. Whether you’re an employee, freelancer, or entrepreneur, the ability to generate and retain value is essential for long-term success. When you’re working as an employee, the risk of losing your job means losing the value you’ve contributed to your employer. Similarly, as a freelancer, once you stop working on a project, there’s little value left in your portfolio except for screenshots or video samples that may not have tangible worth....