watch mode for browserify builds

Update any source file and your browserify bundle will be recompiled on the spot.

Use watchify with all the same arguments as browserify except that -o is mandatory:

$ watchify main.js -o static/bundle.js

Now as you update files, static/bundle.js will be automatically re-compiled on the fly.

You can use -v to get more verbose output to show when a file was written:

$ watchify browser.js -d -o static/bundle.js -v
610598 bytes written to static/bundle.js
610606 bytes written to static/bundle.js
610597 bytes written to static/bundle.js
610606 bytes written to static/bundle.js
610597 bytes written to static/bundle.js
610597 bytes written to static/bundle.js

All the bundle options are the same as the browserify command except for -v.

var watchify = require('watchify')

Create a browserify bundle w from opts.

w is exactly like a browserify bundle except that caches file contents and emits an 'update' event when a file changes. You should call w.bundle() after the 'update' event fires to generate a new bundle. Calling w.bundle() extra times past the first time will be much faster due to caching.

With npm do:

$ npm install -g watchify

to get the watchify command and:

$ npm install watchify

to get just the library.

MIT