Repro

facebookexperimental/Recoil#2298

npm install
npm run build
npm run preview

or

npm install
npm run dev

Fix

FILE="./node_modules/recoil/es/index.js"
ORIGINAL="other.contents === this.contents"
REPLACEMENT="Object.is(other.contents, this.contents)"
sed -i '' "s/$ORIGINAL/$REPLACEMENT/" $FILE

npm run build
npm run preview