use 'browser-pack-flat' to reduce minified bundle size!

- https://github.com/goto-bus-stop/browser-pack-flat

package.json

@@ -114,6 +114,7 @@
   },
   "devDependencies": {
     "brfs": "^1.4.4",
+    "browser-pack-flat": "^3.0.8",
     "browserify": "^15.2.0",
     "browserify-transform-tools": "^1.7.0",
     "check-node-version": "^3.2.0",

tasks/bundle.js

@@ -51,6 +51,7 @@ tasks.push(function(cb) {
         standalone: 'Plotly',
         debug: DEV,
         compressAttrs: true,
+        packFlat: true,
         pathToMinBundle: constants.pathToPlotlyDistMin
     }, cb);
 });
@@ -67,6 +68,7 @@ tasks.push(function(cb) {
     _bundle(constants.pathToPlotlyIndex, constants.pathToPlotlyDistWithMeta, {
         standalone: 'Plotly',
         debug: DEV,
+        packFlat: true
     }, function() {
         makeSchema(constants.pathToPlotlyDistWithMeta, constants.pathToSchema)();
         cb();
@@ -80,6 +82,7 @@ constants.partialBundlePaths.forEach(function(pathObj) {
             standalone: 'Plotly',
             debug: DEV,
             compressAttrs: true,
+            packFlat: true,
             pathToMinBundle: pathObj.distMin
         }, cb);
     });

tasks/util/browserify_wrapper.js

@@ -2,6 +2,7 @@ var fs = require('fs');
 var path = require('path');
 
 var browserify = require('browserify');
+var packFlat = require('browser-pack-flat/plugin');
 var minify = require('minify-stream');
 
 var constants = require('./constants');
@@ -12,16 +13,14 @@ var strictD3 = require('./strict_d3');
  *
  * @param {string} pathToIndex path to index file to bundle
  * @param {string} pathToBunlde path to destination bundle
- *
  * @param {object} opts
- *
  *  Browserify options:
  *  - standalone {string}
  *  - debug {boolean} [optional]
- *
  *  Additional option:
  *  - pathToMinBundle {string} path to destination minified bundle
  *  - compressAttrs {boolean} do we compress attribute meta?
+ *  - packFlat {boolean} do we use browser-pack-flat plugin?
  * @param {function} cb callback
  *
  * Outputs one bundle (un-minified) file if opts.pathToMinBundle is omitted
@@ -49,6 +48,9 @@ module.exports = function _bundle(pathToIndex, pathToBundle, opts, cb) {
 
     var b = browserify(pathToIndex, browserifyOpts);
 
+    if(opts.packFlat) {
+        b.plugin(packFlat);
+    }
 
     var pending = opts.pathToMinBundle ? 2 : 1;