How to make a cheap portable espresso machine (7 photos, 33 comments)

JavaScripte

JavaScript Shell

Sometimes when I’m not certain about how JavaScript behaves, I want to just type a few commands and try it out. Creating an HTML document as a test takes too long, so when I was learning JavaScript, I created a simple shell to test commands. (Don’t laugh, I wrote it in 1996.) I still find a use for it from time to time.

Jesse Ruderman, known for his great bookmarklets site, has created a much better JavaScript testing environment: JavaScript Shell acts just like a command-line shell. You can type a command or expression and it’s executed immediately, displaying the result. Better yet, there’s a bookmarklet version (Mozilla only) that runs in the context of an existing window, great for debugging.

Also useful is the JS Development Enviroment, a semi-IDE that lets you type an entire script and then execute it, and the rest of Jesse’s Web Development Bookmarklets.

 

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