Jade

JavaScript Awesome Development Environment (in Emacs)

Jade connects to a browser tab or nodejs process and provides many features for JavaScript development, including:

• a REPL (with auto completion) & object inspection;
• an inspector, with history and navigation;
• a scratch buffer (M-x jade-scratch);
• JavaScript evaluation in JS buffers with jade-interaction-mode;
• a stepping Debugger, similar to edebug, or cider.

Screenshots

The REPL with company-mode

The REPL showing clickable output

The inspector

The stepping debugger, and an inspector on locals

Getting started

(Emacs 25 is required)

It's available on melpa:

M-x package-install jade

Connection to a chrom[e|ium] tab

Start chrom[e|ium] with the --remote-debugging-port flag:

chromium --remote-debugging-port=9222 https://gnu.org

Evaluate M-x jade-connect-to-chrome.

Connection to a nodejs process

(Note: as of July 31 2016, this requires node-nightly, which can be installed with npm install -g node-nightly).

Start a node process with the --inspect flag:

node --inspect myfile.js

Evaluate M-x jade-connect-to-nodejs.

JavaScript evaluation in JS buffers

Add the following to enable evaluation in all JS buffers:

(add-hook 'js2-mode-hook #'jade-interaction-mode)

Then C-x C-e will evaluate the node before the point, and C-c M-i will inspect the result.

The entire buffer can also be executed with jade-eval-buffer.

Missing features

Jade is young, here's a list of missing/wanted features

• Code evaluation using C-x C-e from project JS buffers
• Adding breakpoints (to remove the need for debugger statements)
• Network inspector (could get inspiration from restclient.el)
• DOM inspector
• Start processes (chromium, node, grunt, gulp, etc.) from Emacs and attach a jade connection to it.

Backends

There is currently support for Chrom[e|ium], & nodejs. The firefox backend is currently missing.