run playground/"npm run build" throw an error

[Aoi Kaze]

I follow the playground/README.md, use 'wasm-pack build' to build wasm,and then run "npm run build" in playground directory.

it throw an error

Then I use "wasm-build build --target web" to build wasm, run "npm run build" again find it's ok

[Herrington Darkholme]

Hi! I think it's a document typo! We need to add --target web