Incompatibility with ESBuild / es6

[amccarthy1]

Hi folks, I'm trying to integrate GraphiQL into our app which uses esbuild. Per the README, it looks like the intent is to target ES6, but at least one dependency (@n1ru4l/push-pull-async-iterable-iterator, which is used in graphql-toolkit) only provide targets for ES2018, meaning it has to be transpiled for production builds. Unfortunately this package uses for await loops, which ESBuild can't transpile to anything but es2018.

This is clearly a limitation with esbuild (webpack + babel handle it just fine), but I'm curious if anyone has had any success getting graphiql to compile using esbuild targeting es2016?

Thanks in advance!

Here's a minimal failing example: https://github.com/amccarthy1/graphiql-bug-example ; in this example craco start works, but craco build fails:

$ craco build
Creating an optimized production build...
Failed to compile.

Transform failed with 1 error:
static/js/main.e96e6071.js:12466:16: ERROR: Transforming for-await loops to the configured target environment ("es2015") is not supported yet