This example is intended to measure the size of various builds to keep track of and minimize dependencies and total code size.

deck.gl support for tree shaking is still experimental, as the feature is just stabilizing in bundlers like webpack 2 and rollup.

Tree-shaking support is provided in the following ways:

• deck.gl builds and publishes (in its npm module) a separate pre-built distribution (dist-es6). This distribution directory differs from the standard dist directory in that all ES6 features except imports and exports have been transpiled to ES5.
• The deck.gl package.json file contains an additional entry point, in addition to main: dist/index.js, names modules: dist-es6/index.js. Tree-shaking JavaScript bundlers, like rollup and webpack 2, look for this field in preference of the main field to select what code to use from a module.
• In addition, this example is provided with build scripts that are intended to trigger and measure the effects of tree-shaking bundling.