Interpreter - JavaScript Interactive Interpreter

This demo is a JavaScript interpreter. Type some code into the text input and press enter to see the results. It uses MochiKit's MochiKit.DOM to manipulate the display. It also supports waiting for MochiKit.Async Deferreds via blockOn(aDeferred).

View Source: [ index.html | interpreter.js ]

Notes:

• To continue code on the next line, end it with //
• function name() {} syntax might not end up in window scope, so use name = function () {} syntax instead
• If you want to stuff something into the output window other than the repr(...) of the expression result, use the writeln(...) function. It accepts anything that MochiKit.DOM does, so you can even put styled stuff in there!
• Use clear() to clear the interpreter window.
• You can use blockOn(aDeferred) to wait on a Deferred. This expression must be used by itself, so the value must be obtained from _ or last_exc. Typing any expression will cancel the Deferred.
• Up and down arrow keys work as a rudimentary history
• _ is the value of the last expression that was not undefined, last_exc is the value of the last unhandled exception.