CodeMirror 6.0
CodeMirror 6 is a new code editor library for the web, a from-scratch implementation based on the experience of building and maintaining versions 1 to 5 for the past 13 years. It aims to be more extensible and accessible than previous versions. As of today, version 6.0 is stable. Going forward, probably at least several years, all new releases will be under the 6 major version, and be backwards co
ProseMirror 1.0
Two years ago, I started the ProseMirror project because I wanted to take a stab at a better approach to WYSIWYG-style editing. Today, I'm releasing version 1.0 of the library. The architecture and scope of the project have changed quite a bit during its lifetime, but I feel that the original goal has been met. ProseMirror is a Web interface component, and though some of the challenges it tackles
Tern
I spend a rather large fraction of my days inside Emacs, writing and editing JavaScript code. Of this time, a significant amount is spent doing things that follow patterns. Pattern which, with a little machine intelligence, could easily be automated. Years ago, before accidentally rolling into this JavaScript career, I mostly programmed Common Lisp. Emacs integration for Common Lisp is divine. It
JavaScript closure vs. object look-up performance
Note: the question asked in this post, "why aren't closures super-fast?", was thorougly answered by Vyacheslav Egorov in his followup. Reading that is probably more informative than reading the text below. I originally structured CodeMirror instances as one huge closure that contained all the internal variables. The constructor would create local variables for all internal state, and local functio
Acorn: yet another JavaScript parser
Acorn is a JavaScript parser written in JavaScript. Another one. Just like: The original UglifyJS parser The new UglifyJS parser ZeParser The Narcissus project's parser Esprima Acorn produces a well-documented, widely used AST format. The same as the last two parsers in that list. Acorn is really fast. Just like the last one in the list: Esprima. Acorn is tiny. About half as big as Esprima, in lin
UglifyJS JavaScript minification
Keeping the uglify service running while somehow protecting my lightweight VM from (often unintentional) denial-of-service attacks by people sending lots of requests or really huge sources was too much of a burden. I've shut it down. You can install uglify-js locally with npm install -g uglify-js instead.
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Eloquent JavaScript's Build System
