16 results for: callbacks
Callbacks in JavaScript
Callback functions are the same old JavaScript functions. They have no special syntax, as they are simply functions that are passed as an argument to another function. The function that receives the callback as an argument is called a higher-order function. Any function can be used as a callback, since it is…
Category : Javascript 22-05-2023 by Janeth Kent
JavaScript Arrow functions: What they are and how to use them
In this article we are going to see what they are and how to use JavaScript Arrow Functions, a new feature introduced with the ES6 standard (ECMAScript 6). What are Arrow Functions Arrow Functions are a new syntax for defining anonymous functions in JavaScript in a more concise way. Being an abbreviated…
Category : Javascript 30-08-2021 by Janeth Kent
Making AJAX requests to a REST API using vanilla JavaScript and XHR
Imagine you just build your first static web page and you would like to add some functionality to make it more attractive and generally more usable. Perhaps you would like to entertain your web page visitor with randomly generated cat facts, jokes, or, (preferably not randomly generated) weather forecasts or…
Category : Javascript 25-11-2020 by Iveta Karailievova
Javascript: what are callbacks and how to use them.
Today we are going to learn about a concept that is widely used in javascript and that is used quite a lot by today's frameworks, libraries, especially NodeJS. This is the use of Callbacks. What is a Callback? Simplifying, it is to pass a function as a parameter so that this function…
Category : Javascript 23-10-2020 by Silvia Mazzetta
JavaScript: Promises explained with simple real life examples
Handling asynchronous data flows is complex, who hasn't faced codes like this one?: checkWeather('palma de mallorca', (error, weather) => { if (error) throw error; if (weather === 'well') { return checkFlights('palma de mallorca', (err, flights) => { if (err) throw err; buyTicket(flights, (e, ticket) => { if (e) throw e; console.log('ticket nº…
Category : Javascript 06-05-2020 by Janeth Kent
Core features overview of JavaScript syntax (ES6)
Several changes to JavaScript were introduced by ECMAScript 2015, also well-known as ES6. Here is a summary of a number of the foremost common options and syntactic variations, where applicable, with comparisons to ES5. Variables and constant comparison In the following table, we provide a brief overview of the concepts of scope…
Category : Javascript 11-05-2020 by Janeth Kent
Level Up Your JavaScript Skills: 12 basic notions
If you are a developer at any level, understanding its basic concepts is crucial. This article highlights 12 basic concepts that are critical to understanding by any JS developer, but do not represent the full range of what a JS developer should know. 1. Value vs. Reference Variable Assignment To coding bug-free JavaScript,…
Category : Javascript 23-05-2020 by Janeth Kent
Which Javascript frameworks will rule in 2019?
In this article, we will review and analyze the 2018 State of JavaScript report to later focus attention on frameworks that will be at the center of attention in 2019. Let's take some time to look at the amazing journey of JavaScript, reflected in the use of more than 20,000 developers…
Category : Javascript 19-02-2019 by Janeth Kent
Async/Await how they really work: an example
Promises give us an easier way to deal sequentially with asynchrony in our code. This is a welcome addition, given that our brains are not designed to deal efficiently with asynchronicity. Async / await functions, help us to write completely synchronous code while performing asynchronous tasks in the background. The functionality…
Category : Javascript 22-02-2019 by Janeth Kent
Tips for JavaScript Developers
Another year is over and JavaScript is constantly changing. However, there are some tips that can help you write in 2019 clean and efficient code that scales. Below is a list of 9 pragmatic suggestions. async / await Are you still trapped in callback hell? Don't use callbacks unless it's completely necessary, such…
Category : Javascript 08-06-2020 by Janeth Kent
Most Popular Node.js Frameworks in 2019
Before Node.js, web developers always faced the issue of having to use different languages for client-side and server-side scripts. JavaScript was traditionally the language for client-side scripting with the HTML code running in the browser. The invention of Node.js in 2009 introduced server-side scripting with JavaScript code running on the…
Category : Javascript 14-02-2019 by Janeth Kent
MySql: How to build a performant search engine
In content-heavy websites, it becomes increasingly important to provide capable search possibilities to help your users find exactly what they’re looking for. The most obvious solution is searching your MySQL database directly, but implementing a generic MySQL search is not at all trivial. Here’s how to avoid those pitfalls and…
Category : Databases 10-09-2016 by Janeth Kent
PHP7: Guide and References to all the changes between version 5.x and 7 of PHP
PHP 7 was released on December 3rd, 2015. It comes with a number of new features, changes, and backwards compatibility breakages that are outlined below. Performance Features Combined Comparison Operator Null Coalesce Operator Scalar Type Declarations Return Type Declarations Anonymous Classes Unicode Codepoint Escape Syntax Closure call() Method Filtered unserialize() IntlChar Class Expectations Group use Declarations Generator Return Expressions Generator Delegation Integer Division with intdiv() session_start() Options preg_replace_callback_array() Function CSPRNG Functions Support…
Category : Php 27-12-2015 by Janeth Kent
PHP: list of best awesome PHP libraries
It is an exciting time to be a PHP developer. There are lots of useful libraries released every day, and with the help of Composer and Github, they are easy to discover and use. Here is a complete list of the coolest that We’ve come across. Package Management Libraries for package and…
Category : Php 27-04-2014 by Janeth Kent
Speed Up Your Coding with 15 jQuery CSS Plugins
Today we have 15 great jQuery CSS plugins pertained to design a beautiful site using cool effects with CSS/jQuery. 1. Stickup Stickup is a simple jQuery plugin that “sticks” an element to the top of the browser window while scrolling past it, always keeping it in view. This plugin works on multi-page sites,…
Category : Css 12-12-2013 by Janeth Kent
10 jQuery Custom Browser Scrollbar Plugins
Custom jQuery scrollbars are really important for creating original and beautiful web applications and websites. jQuery scrollbar plugins and scripts can help you easily add some amazing custom scrollbars to your website. Today, we suggest you 10 useful custom jQuery browser scrollbar plugins. 1. SLY Sly is a JavaScript library for advanced one-directional…
Category : Javascript 26-06-2013 by Janeth Kent
