PrefaceIn TypeScript (TS), there is a type called void. It represents "nothing" but it's important to note that it's not the same as "nothing" in JavaScript(JS).Typically, void is used to declare the return type of functions. Although you can declare a variable as void, we generally don't do this because it serves no meaningful purpose. Let's explore why in the examples below.The void TypeDeclaring a Variable as voidlet name: void; // Declare a variable `name` with type `void`.name = 'nanjiu'; // Error: Cannot assign type 'string' to type 'void'.name = 18; // Error: Cannot assign type 'number'...

Regarding magento website development, making sure your e-commerce system has the necessary capabilities can greatly improve user experience and operational effectiveness. These are the very necessary tools for a strong Magento website.1. Mobile-responsive designCrucially in the mobile-first world of today, a mobile-responsive design guarantees your website runs perfectly across all devices. This increases search engine optimization in addition to user experience.2. Navigating User-friendlinessSimple and easy navigation lets guests quickly discover what they need, therefore lowering bounce rat...

IntroductionThe Event Loop MechanismThe event loop mechanism is the core of how JavaScript handles asynchronous operations. It ensures that the execution order of the code aligns with the expected sequence.JavaScript's Single ThreadJavaScript is known for being a single-threaded language, meaning it executes one task at a time. This can lead to a significant issue: if a thread is blocked, the entire program becomes unresponsive. To address this, JavaScript introduced the event loop mechanism. This mechanism allows JavaScript to handle asynchronous operations while executing tasks, thus improvi...

PrefaceRecently, while using WebSocket (WS) connections, we encountered frequent disconnection issues, occurring hundreds of times per day for a single user. Although using the auto-reconnect feature of socket.io allowed us to quickly restore connections after disconnections, it did not guarantee that every reconnection would successfully receive WS messages. Therefore, we conducted several investigations and tests.Ultimately, we identified the root cause of the issue: the browser's power-saving mechanism, which inadvertently became the culprit behind the problem.Overview of Browser Power-Savi...

Is there a most popular color among humans as a group?While the answer to this question depends on the definition of "most popular," there is an objective way to consider it: by looking at what color of cars sells the best.The color that has the highest sales in the car market indicates the public's strong preference for that color. Last week, a U.S. automotive website released the ranking of colors for all new cars sold in the U.S. in 2023.The result showed that shades of gray are the most popular, specifically various mixes of black and white, including four main colors: white, black, gray, ...

Heuristic cacheHeuristic caching is the default behavior of browser caching (i.e., for responses without Cache-Control), which is not simply "not caching", but implicitly caching based on the so-called "heuristic cache". HTTP is designed to cache as much as possible, so even if Cache-Control is not specified, the response will be stored and reused if certain conditions are met. This is called heuristic caching.HTTP/1.1 200 OKContent-Type: text/htmlContent-Length: 1024Date: Tue, 22 Feb 2022 22:22:22 GMTLast-Modified: Tue, 22 Feb 2021 22:22:22 GMTCache durationThe formula for calculating the cac...

JavaScript's success can be attributed to at least four key figures:Brendan Eich, the creator of JavaScriptDouglas Crockford, the creator of JSLint and JSONJohn Resig, the creator of jQueryRyan Dahl, the creator of Node.js.We are already very familiar with Brendan Eich and the invention process of JavaScript, so let's start with Douglas Crockford, the second in command of JavaScript.AllianceIn the 1990s, Microsoft's dominance overshadowed the whole world.At this time, two challengers emerged, one was the IT giant Sun, and the other was the IT upstart Netscape.Sun believed that Java programs co...

As the web continues to evolve, so too does the JavaScript ecosystem. With the release of ECMAScript 2023 (ES2023), JavaScript developers can now leverage a range of new features that promise to improve code quality, readability, and maintainability. In this blog post, we'll dive into some of ES2023's most exciting additions and provide practical examples of how they can be used in your projects.1. Private Fields and Methods in ClassesOne of the most anticipated features in ES2023 is the introduction of private fields and methods in classes. These enable developers to encapsulate internal clas...