Introduction to JavaScript Job support
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What is JavaScript ?
JavaScript is a dynamic computer programming language. It is lightweight and most commonly used as a part of web pages, whose implementations allow client-side script to interact with the user and make dynamic pages. It is an interpreted programming language with object-oriented capabilities.
JavaScript was first known as LiveScript, but Netscape changed its name to JavaScript, possibly because of the excitement being generated by Java. JavaScript made its first appearance in Netscape 2.0 in 1995 with the name LiveScript. The general-purpose core of the language has been embedded in Netscape, Internet Explorer, and other web browsers.
The ECMA-262 Specification defined a standard version of the core JavaScript language.
- JavaScript is a lightweight, interpreted programming language.
- Designed for creating network-centric applications.
- Complementary to and integrated with Java.
- Complementary to and integrated with HTML.
- Open and cross-platform
Client-Side JavaScript:
Client-side JavaScript is the most common form of the language. The script should be included in or referenced by an HTML document for the code to be interpreted by the browser.
It means that a web page need not be a static HTML, but can include programs that interact with the user, control the browser, and dynamically create HTML content.
The JavaScript client-side mechanism provides many advantages over traditional CGI server-side scripts. For example, you might use JavaScript to check if the user has entered a valid e-mail address in a form field.
The JavaScript code is executed when the user submits the form, and only if all the entries are valid, they would be submitted to the Web Server.
JavaScript can be used to trap user-initiated events such as button clicks, link navigation, and other actions that the user initiates explicitly or implicitly.
Advantages of JavaScript:
The merits of using JavaScript are −
- Less server interaction − You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
- Immediate feedback to the visitors − They don’t have to wait for a page reload to see if they have forgotten to enter something.
- Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.
- Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors
Importance of JavaScript:
JavaScript Job Support – JavaScript is not just for programming in the browser, but on servers, game programming, databases ,and even robots. JavaScript the scripting language for your behavior and interactivity of what happens when you mouse over a menu , what happens when you type the wrong value in a form field, how long does the photo slideshow take to move from one image to the next.
- JavaScript is referred to as one of the three core languages of webpages HTML, CSS , JavaScript.
- The operating system runs the web browser, the web browser contains a page and the page contains the JavaScript. Idestrainings is the best place to learn JavaScript Job Support.
- There are no words in JavaScript to talk to a database or target a USB port because it was designed to manipulate the webpages and it does that very well.
- JavaScript is a client side language ,it is sent to the users computer and it runs there ,that is as opposite to server-side technologies like PHP,ASP DOT NET etc. With JavaScript we just send our code to the client and we let them run it.
Conclusion to JavaScript Job Support:
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