What are Events? As users interact with your site, several things can happen. Users could be clicking buttons, scrolling, or typing. Your site might also be making elements load, errors appear, or page variants
In JavaScript, server-sent events (SSE) enable the server to send data to the client. The client require to establish a connection with the server to get data from the server. The server-sent events are similar to the WebSocket as it also establishes a connection between the client and ser...
In JavaScript, closures are created every time a function is created, at function creation time.”Let’s unpack that.“In other words, a closure gives you access to an outer function’s scope from an inner function.” Let’s see this in action using a similar example to the one above:...
A callback function in JavaScript is a function that is passed as an argument to another function and is invoked after some kind of event.
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Reactis a popular JavaScript library. It doesn’t have native decorators in the same way Angular does. However, React introduced a concept known as higher-order components (HOCs), which act as a form of decorator. HOCs are functions that take a component and return a new enhanced component...
Asynchronous operations.JavaScript supports asynchronous programming, allowing operations like fetching data from a server to run in the background without blocking the main execution thread. This is achieved through callbacks, promises, and the async/await syntax. Asynchronous operations are essential for...
The following are some of the disadvantages of using JavaScript:Browser compatibility ‒ different web browsers interpret JavaScript code differently, causing inconsistency. Therefore, you should test your JavaScript script in all popular web browsers, including their older versions, to avoid harming the...
Availability zones are multiple, isolated locations within a region. Each AZ is identified by a unique code. For example, the code for AWS' AZ namedUS West (N. California), launched in 2009, isus-west-1; the code for the AZ namedAsia Pacific (Mumbai)that was launched in 2016 isap-so...
Events are the primary method of packaging messages in the Channels system. They form the basis of all communication. They are essentially ‘named messages’ which means you can set up ‘handlers’ in your client code to deal with the various types. As such they are used for client-side ro...