What is jscript

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Alan Storm Alan Storm k 86 86 gold badges silver badges bronze badges. Neither the languages are really identical, as outlined in another post. JScript is the Microsoft implementation of Javascript. James Boother James Boother According to this article: JavaScript is a scripting language developed by Netscape Communications designed for developing client and server Internet applications. Christophe Herreman Christophe Herreman AFAIK, it means "orthogonal".

Calling JScript "high-performance" back in the pre-V8 era makes one realize how far we have come. The second list item looks like advertising material - "open implementation" actually means "you have to be open minded to accept it", and "high-performance" means "meant to be run on a high-performance machine".

Pang 8, gold badges 82 82 silver badges bronze badges. Alexander Gharibashvili Alexander Gharibashvili 5 5 silver badges 14 14 bronze badges. There are some code differences to be aware of. Shiraz Shiraz 1, 16 16 silver badges 16 16 bronze badges. Clif Clif 1. I think you are thinking of JScript. Net — user Oracle bought Sun. Go easy on the bolds!

Why Java? You meant JavaScript. An important note for anyone that might not know: JavaScript and Java are not the same thing or related in any way. JavaScript was originally called LiveScript. But renamed to JavaScript to capitalize on the popularity of Java. Sharing the name is the extent of what they have in common aside from similarities with C like syntax languages. Cookie Policy.

What is JavaScript? What is JavaScript used for? Here are some basic things JavaScript is used for: 1. Adding interactive behavior to web pages JavaScript allows users to interact with web pages. There are almost no limits to the things you can do with JavaScript on a web page — these are just a few examples: Show or hide more information with the click of a button Change the color of a button when the mouse hovers over it Slide through a carousel of images on the homepage Zooming in or zooming out on an image Displaying a timer or count-down on a website Playing audio and video in a web page Displaying animations Using a drop-down hamburger menu 2.

Creating web and mobile apps Developers can use various JavaScript frameworks for developing and building web and mobile apps. Building web servers and developing server applications Beyond websites and apps, developers can also use JavaScript to build simple web servers and develop the back-end infrastructure using Node.

Game development Of course, you can also use JavaScript to create browser games. Why use JavaScript over other programming languages? This is a good security measure — if this were not the case, then pirates could start writing code to steal information from other websites, and other such bad things.

When the browser encounters a block of JavaScript, it generally runs it in order, from top to bottom. This means that you need to be careful what order you put things in. For example, let's return to the block of JavaScript we saw in our first example:. Here we are selecting a text paragraph line 1 , then attaching an event listener to it line 3 so that when the paragraph is clicked, the updateName code block lines 5—8 is run.

The updateName code block these types of reusable code blocks are called "functions" asks the user for a new name, and then inserts that name into the paragraph to update the display.

If you swapped the order of the first two lines of code, it would no longer work — instead, you'd get an error returned in the browser developer console — TypeError: para is undefined. This means that the para object does not exist yet, so we can't add an event listener to it. Note: This is a very common error — you need to be careful that the objects referenced in your code exist before you try to do stuff to them.

You might hear the terms interpreted and compiled in the context of programming. In interpreted languages, the code is run from top to bottom and the result of running the code is immediately returned. You don't have to transform the code into a different form before the browser runs it. The code is received in its programmer-friendly text form and processed directly from that. Compiled languages on the other hand are transformed compiled into another form before they are run by the computer.

The program is executed from a binary format, which was generated from the original program source code. JavaScript is a lightweight interpreted programming language. The web browser receives the JavaScript code in its original text form and runs the script from that. From a technical standpoint, most modern JavaScript interpreters actually use a technique called just-in-time compiling to improve performance; the JavaScript source code gets compiled into a faster, binary format while the script is being used, so that it can be run as quickly as possible.

However, JavaScript is still considered an interpreted language, since the compilation is handled at run time, rather than ahead of time. You might also hear the terms server-side and client-side code, especially in the context of web development. Client-side code is code that is run on the user's computer — when a web page is viewed, the page's client-side code is downloaded, then run and displayed by the browser.

In this module we are explicitly talking about client-side JavaScript. Server-side code on the other hand is run on the server, then its results are downloaded and displayed in the browser. NET and JavaScript can also be used as a server-side language, for example in the popular Node.

Server-side code dynamically generates new content on the server, e. The meaning is slightly different in the two contexts, but related, and both approaches server-side and client-side usually work together. A web page with no dynamically updating content is referred to as static — it just shows the same content all the time. Let's learn how this works. Note: If your example doesn't seem to work, go through the steps again and check that you did everything right.

Did you save your local copy of the starting code as a. Did you enter the JavaScript exactly as shown? JavaScript is case sensitive, and very fussy, so you need to enter the syntax exactly as shown, otherwise it may not work. Note: You can see this version on GitHub as apply-javascript-internal. This works great, but what if we wanted to put our JavaScript in an external file?