✔️ SEO HELPER | NICOLA.TOP
JavaScript is a programming language that is used to create interactive elements on web pages. It allows you to make the site more dynamic and user-friendly. Without JavaScript, most modern websites would be far less functional and less interesting for visitors.
JavaScript can be used to perform many tasks on websites. With it, you can create interactive forms, animations, menus, and more. It can also be used to validate user input and process it on the server without reloading the page.
There are many libraries and frameworks that make it easy to write JavaScript code. Some of the most popular are React, Angular, Vue.js, jQuery, and Node.js. They provide developers with a wide range of tools to work with the language and help make code more readable and maintainable.
JavaScript has many features that make it different from other programming languages. It is interpreted, which means that the code is executed as it is read. JavaScript also supports functional programming, making it more flexible and powerful for certain tasks.
JavaScript requires knowledge of HTML and CSS. It is also helpful to have experience with libraries and frameworks such as React or Angular. You also need to be able to develop code that will be optimized to work on different devices and browsers.
To use JavaScript on your site, you must insert the appropriate code on the page. This can be done with a script> tag placed inside a head> or body> tag. The code can be written directly on the page or included from an external file. Do not forget that JavaScript can greatly slow down page loading, so it is important to optimize its performance and use only those functions that are necessary for the site to work.
Although JS is a powerful programming language, using it can lead to a number of problems. One of the most common problems is cross-browser incompatibility, when the code only works correctly in certain browsers. JavaScript can also slow down site performance, especially when using a large number of scripts. It is also important to consider security when working with JS in order to avoid possible attacks on the site.
JS is constantly evolving and new technologies and trends are emerging. For example, recently frameworks and libraries that allow you to create web applications using JS and other technologies have become more and more popular. Serverless architecture is also gaining popularity, when all the application logic is located on the server, and the client part uses JS to communicate with the server. An important trend is also the development of the JS ecosystem, which provides developers with many tools for working with the language and creating high-quality applications.
ECMAScript ("ES" for short) is a general-purpose scripting language implemented according to the ECMA-262 standard. The ECMA-262 standard mainly defines the syntax, types, operators, keywords, reserved words, operators, objects and other parts of the language, the latest version of ECMAScript is ECMAScript6 (called “ES6”).
When it comes to JS, sometimes people think that JS and ECMAScript are the same thing. Actually JS contains much more content than specified in ECMA-262. The complete JS consists of the following three parts:
1. Core (ECMAScript): provides the syntax and core objects of the language;
2. Document Object Model (DOM): provides methods and interfaces for processing web content;
3. Browser Object Model (BOM): Provides methods and interfaces for interacting with the browser.
JS code as a scripting language cannot be independently executed. Usually a browser is required to run JS code. All web browsers support JS.
JS code can be executed not only in a browser, but also on a server or device equipped with a JS engine. The reason the browser can execute JS code is because the JS engine is built into the browser. JS engines include:
1. V8: JS engine in Chrome and Opera;
2. SpiderMonkey: JavaScript engine in Firefox;
3. Chakra: JS engine in IE;
4. ChakraCore: JS engine in Microsoft Edge;
5. SquirrelFish: JS engine in Safari.
JS has the following characteristics:
JS is an interpreted scripting language. Unlike languages like C and C++ that need to be compiled and then run, code written in JS does not need to be compiled and can be executed directly.
JS is an object-oriented language with which you can not only create objects, but also manipulate existing objects.
JS is a weakly typed programming language, there are no strict requirements for the data type used, for example, you can initialize a variable to any type, and you can change the type of this variable at any time.
JS is an event-driven scripting language that can respond to user input without the help of a web server. For example, when we visit a web page, click a web page with the mouse, or scroll a window, we can use JS to respond to user actions. React directly to these events.
JS is operating system independent and can be run in a browser. Thus, a JS script can be run on any system after it is written, as long as the browser on the system supports JS.
⟹ The following are materials covering this topic:
Websites are usually divided into two parts: front-end and back-end. We can understand that the background is used to implement the functions of the website, such as: performing user registration, changing passwords, commenting on articles, etc...
Greetings, dear readers! Today we will talk about Gzip js compression | css | html to speed up site loading. How to enable it with .htaccess file. I also...
A slow site is always bad! It seems to me that the phrase CSS code optimization to speed up the site is often present in the search as well as 301 redirects or robots.txt. Or maybe you're into...
Caching site pages using .htaccess. An equally important stage of technical optimization is the inclusion of gzip compression or CSS minification. Enabling Cache pages and files will allow you to significantly increase the speed of the site....
Optimization of the JS and CSS code of the site is one of the most significant aspects of the technical optimization of the site. The reason for this is to free up more site resources by reducing database calls and...
Continue reading:
