Web Developer Notes - Page 2

Longwave (LW) is a radio frequency band characterized by very low frequencies and extremely long wavelengths. Depending on the language and technical context, you may encounter different abbreviations: LW (Long Wave) — common English-language term LF (Low Frequency) — official ITU classification ДВ — Russian abbreviation (“Long Waves”) GO (Grandes Ondes) — French term In technical...

Сookie (web cookie or browser cookie) is a string of information that can be stored in a browser and sent to the server. The maximum size for one cookie is 4096 bytes. The number of cookies for one domain can be from 20 to 242, depending on the browser. Cookies are written as a string, but on a key-to-value basis. [js]document.cookie = "username=John Brown";[/js] Cookies may contai...

If you have the coordinates of two points on a map, calculating the distance between them is a fairly straightforward task. This type of calculation is commonly used in mapping applications, delivery services, navigation systems, and location-based features. In this example, we will focus on determining the distance using geographic coordinates such as latitude and longitude. These values allow us...

Converting an image to a Base64 string in JavaScript can be extremely useful in many modern web development scenarios. One of the most common reasons for using Base64 is to send image data through an API, where binary files might not be accepted directly. Base64 is also convenient when you want to display a preview of an uploaded image before sending it to the server. Instead of uploading the file...

Building modern websites with Vue or React has become the standard practice in web development. However, when you try to deploy a Single Page Application (SPA) to a regular shared hosting environment, you may encounter a common issue — only the home page loads correctly, while all internal routes (pages) return a 404 error. This happens because the hosting server doesn’t understand client-side rou...