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up vote 3 down vote favorite

I'm reading books on JavaScript programming, and I need an environment like Python's IDLE to type JavaScript commands into and then see the results like you would in IDLE.

Is there an environment where you can do such a thing?

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put on hold as off-topic by Thomas Owens♦ yesterday

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6 Answers 6

up vote 14 down vote

Any of the major browsers (IE, FireFox, Chrome, Safari, etc..) will execute and display the results of JavaScript code that you put into it.

You can open the developer console in Chrome and in IE using F12 and in Firefox using Ctrl+Shift+K. Alternatively you can simply put it into a .html file.

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4  
This answer really needs to say more about how to put the Javascript into your browser; in particular, it ought to mention the Javascript console. –  user2357112 2 days ago
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up vote 13 down vote

I find http://jsfiddle.net/ to be a good test environment for trying things out (in JavaScript, HTML and CSS), if you just want to try something easily and now using your browser.

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I second jsfiddle, especially because it's really plug&play. You don't need to worry about connecting your HTML and CSS to your javascript properly, and it reacts almost instantly. You just write your code, write your HTML, press a button and you see the result instantly. And because it's a website, you can link other people to your code extremely easily for debugging and demonstration purposes. –  Nate Kerkhofs 2 days ago
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up vote 3 down vote

Mainstream browsers' dev tools have a console for executing expressions:

https://developer.chrome.com/devtools/docs/console#evaluating-expressions http://msdn.microsoft.com/en-us/library/ie/gg589530(v=vs.85).aspx

There is also Plunker. It is similar to jsFiddle that was already mentioned.

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@MattThrower See first comment of the first answer. That answer was edited since then. My answer points to exactly what is needed and there is not much point copy-pasting the information that is already perfectly worded. Please apply a bit of common sense next time instead of following the guidelines blindly. –  Den yesterday
    
Reminders to use common sense are always appreciated. But in this case, I already did. Mileage varies. –  Matt Thrower yesterday
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up vote 2 down vote

Most of the answers centre on Javascript in the web browser. If you're interested in server-side Javascript (or more generally, Javascript in non-browser environments), then you've got a couple of other options:

  • NodeJS is currently the most popular server-side Javascript framework, and comes with an interactive console. Once you've installed NodeJS, you can start the console either from the Start Menu, or by typing node into a terminal.
  • There's also a reasonable amount of buzz about Nashorn, which is bundled with Java 8. Once you've installed JDK 8, you can start the console by running jjs, which depending on your OS will either be available automatically from the terminal, or found at $JAVA_HOME/bin/jjs.
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up vote 0 down vote

As for actual IDE's, you could use Visual Studio (express version is free). They've added better JS intellisense support in the past few releases.

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up vote 0 down vote

Jetbrains Webstorm is an IDE you can use as well, if that's the sort of thing you're looking into.

Otherwise, there's probably an eclipse plugin.

There's also Sublime Text and Atom, that, with a few plugins, can do it very well.

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