Forms playground sidebar not showing up?

This is an issue with the dragula library. For some reason, the library uses global which is undefined in browsers like Chrome (cf. Angular 7: Uncaught ReferenceError: global is not defined when adding package · Issue #602 · bevacqua/dragula · GitHub). Webpack polyfills global by default (cf. Module Variables | webpack). You need to polyfill global, too.

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