Gitako/packages/react/index.js

import preact from 'preact'
/** @jsx preact.h */

function shallowEqual(a, b) {
  if (a === b) return true
  if (typeof a === 'object' && typeof a === typeof b) {
    if (a === null || b === null) return false
    for (const key in a) {
      if (a[key] !== b[key]) return false
    }
    for (const key in b) {
      if (!Object.prototype.hasOwnProperty.call(a, key)) return false
    }
    return true
  }
  return false
}

class PureComponent extends preact.Component {
  shouldComponentUpdate(nextProps, nextState) {
    return !shallowEqual(this.props, nextProps) || !shallowEqual(this.state, nextState)
  }
}

const React = {
  ...preact,
  PureComponent,
  createElement: preact.h,
}

export default React