Web Developer Notes - Page 7

Sometimes it becomes necessary to limit the number of requests to an external data source, especially when the data does not change frequently. For example, this can be useful when working with APIs that provide exchange rates, weather data, or other information that is updated only periodically. Making a request on every page load in such cases is inefficient and can slow down your application. ...

There are several ways to create objects in JavaScript. The Object data type plays a critical role in JS. An object is an unordered set of key-value pairs. May contain other objects. 1. Literal notation [js] const someObject1 = {}; [/js] Perhaps the most common and easiest way. Let's add properties and methods [js] someObject1.name = "John"; someObject1.age = 25; someObject1.run...

Sometimes it is necessary to detect the direction of vertical scrolling on a website in order to dynamically change the behavior of interface elements. For example, this can be useful when working with a header or footer — hiding them while scrolling down to save screen space, and showing them again when the user scrolls up. Scroll direction detection can also improve user experience in other s...

A favicon (short for “favorite icon”) is a small graphical icon associated with a website. It is displayed in browser tabs, bookmarks, history lists, and sometimes in search results, helping users quickly recognize and identify a site. Favicons serve both a functional and branding purpose by improving navigation and making a website visually distinct. In the past, the .ico format was commonly u...

When setting up a website, one of the small but important technical details is choosing a preferred domain version — with or without “www”. From an SEO perspective, this decision matters because search engines may treat these versions as separate URLs if they are not properly configured. This can lead to duplicate content issues, split ranking signals, and weaker overall visibility in search resul...