Relay: UglifyJs fails after upgrade to relay-runtime 10.0.0

[k7paul]

After upgrading relay-runtime and relay-compiler from 9.1.0 to 10.0.0 I started to get the following error from UglifyJs:

ERROR in bundle.js from UglifyJs Unexpected token: operator «*», expected: punc «(» [./node_modules/relay-runtime/lib/store/RelayModernStore.js:639,0][bundle.js:56627,28]

Uglify is called from webpack config like so:

...
devtool: 'source-map',
plugins: [
    new UglifyJSPlugin({
        sourceMap: true
    }),
...

Any ideas / workarounds?

[josephsavona]

The file in question has a generator function which is somewhat newer syntax (been around a while though). You'll likely have to change whatever JS parser you're using to handle more recent syntax.

[tbergq]

This is also causing problems in IE-11, since IE-11 does not support generator functions.

I have to transpile relay-runtime to make it work.

[josephsavona]

Yup, you may have to transform the code to support outdated browsers.

[stale[bot]]

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