It didn't support transpiling generators to es5. Compiling to es6 would work and you could add babel to transpile down to es5 so in practice this wasn't much of

It didn't support transpiling generators to es5. Compiling to es6 would work and you could add babel to transpile down to es5 so in practice this wasn't much of a problem. Async iterators are very exciting and builds should be faster without babel in the pipeline.