Tree shaking in NextJS includes all of node_modules package even if not using it all
In order for the tree-shaking to work properly react-color should add module property to the package.json which will point to esm version of the lib.
Since it doesn't have it, you will need import directly.
Before:
import React from 'react'import SketchPicker from 'react-color'class Component extends React.Component { render() { return <SketchPicker /> }}
After:
import React from 'react'import SketchPicker from 'react-color/lib/Sketch'class Component extends React.Component { render() { return <SketchPicker /> }}