Minification fails with uglifyjs and mapbox-gl-dev

[bdirito]

refs #4359 - fixed this for the nondev version of mapbox code

mapbox-gl: 0.51
uglify-js: 3.4.9
webpack: 4.26.0

import mapboxgl from 'mapbox-gl/dist/mapbox-gl-dev'

When you use uglifyJs with the dev version of the code minification fails with an

[Error] ReferenceError: Can't find variable: e (blob:http://localhost/f2a6b98f-a95d-452c-8f6b-9d058eeb6c45, line 1, x2)

error.

[mourner]

Right, we'll look into it. The root cause is probably the assert module, which gets treeshaken away in the production build, but causes problems in the development one.

[mourner]

While we still want to fix the dev build for webpack, the better option for this case is to use mapbox-gl/dist/mapbox-gl-unminified build instead of the dev one — it was created specifically for this purpose. It's like the production build (tree-shaken and without asserts) but not minified so that you can use your own minification setup.