What is JavaScript?

What is JavaScript?


Once upon a time there was internet. You
know, a bunch of computers all connected by wires. One person on a computer can
read documents from another person’s computer using a language called HTML. Each computer’s
web browser can properly display these documents. Add CSS to the mix and you’ve
got a beautifully-styled web page. It is important to note that neither HTML nor
CSS are programming languages. back in Back in 1995 a few people at Netscape started to
wonder, “What if there was a way to write a computer program for the browser?” This way, when HTML and CSS gets sent from one computer to another you can also send over some programming. This code would run in someone’s web browser and create an even better user
experience. Thus JavaScript was born! You’re probably familiar with Twitter.
They use a lot of JavaScript on their web page to do things. Such as opening up
a tweet in a bigger window for instance Also, any of the actions below a tweet
will trigger some JavaScript to be run. If I click the star to favorite a tweet
JavaScript will tell the server, “This tweet is now a favorite.” If I click on
reply you can see the JavaScript behavior at work yet again — it focuses on the expanded reply box. All of this behavior is made possible by JavaScript It’s worth mentioning that
Java is not JavaScript. They are two separate programming languages. JavaScript is not just for programming in the browser, but on servers, game programming, databases, and even robots. Yeah, robots! We’re only limited by our
imaginations. Are you excited yet? To get started — if
you’re new to these parts — please take a moment to play through our free five minute tutorial on JavaScript.com. Or you can head over to our getting started
page where we’ve curated a list of free places to learn. On our news page you can submit your own
JavaScript news, read what other people have posted, subscribe to our weekly newsletter or
listen to our podcast. Welcome to the wonderful world of
JavaScript. We hope you enjoy your stay. Awesome! Let’s try it!

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