animated css gears

animated css gears.js

//@flow
import * as React from 'react'
import {render} from 'react-dom'
import styled, {keyframes, css} from 'styled-components'

export function run() {
  let devpage = document.querySelector('#devpage')
  if (!devpage) {
    devpage = document.createElement('div')
    const {body} = document
    if (!body) return
    body.appendChild(devpage)
    devpage.id = 'devpage'
  }
  render(<Gears />, devpage)
}

const Gears = () => (
  <Container>
    <Gearbox>
      <Overlay />
      <GearOne>
        <GearInner>
          <Bar />
          <Bar />
          <Bar />
        </GearInner>
      </GearOne>
      <GearTwo>
        <GearInner>
          <Bar />
          <Bar />
          <Bar />
        </GearInner>
      </GearTwo>
      <GearThree>
        <GearInner>
          <Bar />
          <Bar />
          <Bar />
        </GearInner>
      </GearThree>
      <GearFour>
        <GearInner>
          <Bar />
          <Bar />
          <Bar />
          <Bar />
          <Bar />
          <Bar />
        </GearInner>
      </GearFour>
    </Gearbox>
  </Container>
)

const clockwise = keyframes`
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
`
const counterClockwise = keyframes`
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(-360deg);
  }
`

const Bar = styled.div`
  &:nth-child(2) {
    transform: rotate(60deg);
  }
  &:nth-child(3) {
    transform: rotate(120deg);
  }
  &:nth-child(4) {
    transform: rotate(90deg);
  }
  &:nth-child(5) {
    transform: rotate(30deg);
  }
  &:nth-child(6) {
    transform: rotate(150deg);
  }
`

const GearInner = styled.div`
  position: relative;
  height: 100%;
  width: 100%;
  background: #555;
  animation-iteration-count: infinite;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  & ${Bar} {
    background: #555;
    height: 16px;
    width: 76px;
    position: absolute;
    left: 50%;
    margin-left: -38px;
    top: 50%;
    margin-top: -8px;
    border-radius: 2px;
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
  }
`

const Gear = styled.div`
  position: absolute;
  height: 60px;
  width: 60px;
  box-shadow: 0px -1px 0px 0px #888888, 0px 1px 0px 0px black;
  border-radius: 30px;
  &:after {
    content: '';
    position: absolute;
    height: 36px;
    width: 36px;
    border-radius: 36px;
    background: #111;
    top: 50%;
    left: 50%;
    margin-left: -18px;
    margin-top: -18px;
    z-index: 3;
    box-shadow: 0px 0px 10px rgba(255, 255, 255, 0.1),
      inset 0px 0px 10px rgba(0, 0, 0, 0.1), inset 0px 2px 0px 0px #090909,
      inset 0px -1px 0px 0px #888888;
  }
`
const Overlay = styled.div`
  border-radius: 6px;
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 10;
  box-shadow: inset 0px 0px 20px black;
  transition: background 0.2s;
`
const Gearbox = styled.div`
  background: #111;
  height: 150px;
  width: 200px;
  position: relative;
  border: none;
  overflow: hidden;
  border-radius: 6px;
  box-shadow: 0px 0px 0px 1px rgba(255, 255, 255, 0.1);
`
const large = css`
  height: 120px;
  width: 120px;
  border-radius: 60px;
  &:after {
    height: 96px;
    width: 96px;
    border-radius: 48px;
    margin-left: -48px;
    margin-top: -48px;
  }
  & ${GearInner} {
    border-radius: 60px;
    & ${Bar} {
      margin-left: -68px;
      width: 136px;
    }
  }
`
const GearOne = styled(Gear)`
  top: 12px;
  left: 10px;
`
const GearTwo = styled(Gear)`
  top: 61px;
  left: 60px;
`
const GearThree = styled(Gear)`
  top: 110px;
  left: 10px;
`
const GearFour = styled(Gear)`
  top: 13px;
  left: 128px;
  ${large};
`

const Container = styled.div`
  z-index: 1;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -100px;
  height: 150px;
  width: 200px;
  margin-top: -75px;
  &:hover {
    & ${GearOne} ${GearInner} {
      animation: ${counterClockwise} 1s 1 ease-in-out;
    }
    & ${GearTwo} ${GearInner} {
      animation: ${clockwise} 1s 1 ease-in-out;
    }
    & ${GearThree} ${GearInner} {
      animation: ${counterClockwise} 1s 1 ease-in-out;
    }
    & ${GearFour} ${GearInner} {
      animation: ${counterClockwise} 1s 1 ease-in-out;
    }
  }
`