Where is javascript

Yes No. Thank you! Any more feedback? The more you tell us the more we can help. Can you help us improve? Resolved my issue. Clear instructions. Easy to follow. No jargon. All major browsers support JavaScript. If "scripting" using JavaScript programming language is disabled in the browser, the content or functionality of web pages such as sign-in, customizing screens, or printing in CTI Navigator Web can be limited or unavailable.

Try clicking on this last version of the text label to see what happens note also that you can find this demo on GitHub — see the source code , or run it live! The core client-side JavaScript language consists of some common programming features that allow you to do things like:. What is even more exciting however is the functionality built on top of the client-side JavaScript language.

APIs are ready-made sets of code building blocks that allow a developer to implement programs that would otherwise be hard or impossible to implement. They do the same thing for programming that ready-made furniture kits do for home building — it is much easier to take ready-cut panels and screw them together to make a bookshelf than it is to work out the design yourself, go and find the correct wood, cut all the panels to the right size and shape, find the correct-sized screws, and then put them together to make a bookshelf.

Browser APIs are built into your web browser, and are able to expose data from the surrounding computer environment, or do useful complex things. For example:. Note: Many of the above demos won't work in an older browser — when experimenting, it's a good idea to use a modern browser like Firefox, Chrome, Edge or Opera to run your code in.

You will need to consider cross browser testing in more detail when you get closer to delivering production code i. Third party APIs are not built into the browser by default, and you generally have to grab their code and information from somewhere on the Web. Note: These APIs are advanced, and we'll not be covering any of these in this module. You can find out much more about these in our Client-side web APIs module.

There's a lot more available, too! However, don't get over excited just yet. You won't be able to build the next Facebook, Google Maps, or Instagram after studying JavaScript for 24 hours — there are a lot of basics to cover first. And that's why you're here — let's move on! Here we'll actually start looking at some code, and while doing so, explore what actually happens when you run some JavaScript in your page. Let's briefly recap the story of what happens when you load a web page in a browser first talked about in our How CSS works article.

This is like a factory that takes in raw materials the code and outputs a product the web page. Note that the code in your web documents is generally loaded and executed in the order it appears on the page.

You will learn ways around this later in the article, in the Script loading strategies section. Each browser tab has its own separate bucket for running code in these buckets are called "execution environments" in technical terms — this means that in most cases the code in each tab is run completely separately, and the code in one tab cannot directly affect the code in another tab — or on another website.

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. It was used under license for technology invented and implemented by Netscape Communications and current entities such as the Mozilla Foundation. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Where is JavaScript?

Ask Question. Asked 7 years, 10 months ago. Active 3 months ago. Viewed 8k times. I see Java But I don't see JavaScript In short Improve this question. Peter Mortensen 29k 21 21 gold badges 97 97 silver badges bronze badges. Question Everything Question Everything 2, 3 3 gold badges 17 17 silver badges 24 24 bronze badges.

I suspect the answers you seek lie here: en. Javascript has no javascript. The language is specified and every browser creates it's own implementation which follows as good as possible the javascript specification. Ennui Yup I saw that before posting, it says: Netscape and Mozilla.