HSL调光器

下载代码

html

css

分享到微信朋友圈

html

css

* {
  -webkit-tap-highlight-color: transparent;
  box-sizing: border-box;
}
:root {
  --hue: 221;
  --light: 37.5;
  --transition: 0.15s;
}
body {
  background: hsl(var(--hue), 50%, calc(var(--light) * 1%));
  -webkit-transition: background var(--transition);
  transition: background var(--transition);
  cursor: var(--cursor);
  min-height: 100vh;
  touch-action: none;
}
.switch {
  --size: 200;
  --panel-hue: 55;
  --panel-saturation: 10;
  --faceplate: hsl(55, 10%, calc((30 + var(--light)) * 1%));
  --faceplate-light: hsl(55, 10%, calc((50 + var(--light)) * 1%));
  --faceplate-dark: hsl(55, 10%, calc((0 + var(--light)) * 1%));
  --pressed: 0;
  background: -webkit-gradient(linear, left bottom, left top, from(var(--faceplate-dark)), to(var(--faceplate-light)));
  background: linear-gradient(0deg, var(--faceplate-dark), var(--faceplate-light));
  border-radius: 5%;
  height: calc(var(--size) * 1px);
  overflow: hidden;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  width: calc(var(--size) * 1px);
  box-shadow: 0px 10px 0px 0px hsl(var(--hue), 50%, calc((var(--light) - 10) * 1%));
  -webkit-transition: background var(--transition), box-shadow var(--transition);
  transition: background var(--transition), box-shadow var(--transition);
}
.switch__faceplate {
  background: var(--faceplate);
  height: calc(100% - 10px);
  width: calc(100% - 10px);
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  border-radius: 5%;
  -webkit-transition: background var(--transition);
  transition: background var(--transition);
}
.switch__faceplate:after,
.switch__faceplate:before {
  --screw: hsl(0, 0%, calc((20 + var(--light)) * 1%));
  --screw-dark: hsl(0, 0%, calc((0 + var(--light)) * 1%));
  --screw-darkest: hsl(0, 0%, calc((-20 + var(--light)) * 1%));
  content: '';
  height: 8%;
  width: 8%;
  background: -webkit-gradient(linear, left top, left bottom, from(calc(var(--rotation, 30) * 1deg)), color-stop(0%, var(--screw)), color-stop(45%, var(--screw)), color-stop(45%, var(--screw-dark)), color-stop(55%, var(--screw-dark)), color-stop(55%, var(--screw)));
  background: linear-gradient(calc(var(--rotation, 30) * 1deg), var(--screw) 0%, var(--screw) 45%, var(--screw-dark) 45%, var(--screw-dark) 55%, var(--screw) 55%);
  box-shadow: 0px 1px 0px 1px var(--screw-darkest) inset;
  border-radius: 50%;
  top: 50%;
  -webkit-transform: translate(0, -50%);
          transform: translate(0, -50%);
  position: absolute;
  -webkit-transition: background var(--transition), box-shadow var(--transition);
  transition: background var(--transition), box-shadow var(--transition);
}
.switch__faceplate:after {
  --rotation: 120;
  right: 10%;
}
.switch__faceplate:before {
  left: 10%;
}
.switch__button {
  height: 35%;
  width: 35%;
  border: 0;
  background: var(--faceplate);
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  outline: transparent;
  padding: 0;
  cursor: pointer;
  -webkit-transition: background var(--transition);
  transition: background var(--transition);
}
.switch__button:before {
  content: '';
  height: 99%;
  width: 99%;
  background: var(--faceplate-dark);
  position: absolute;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%) translate(0, calc((10 - (var(--pressed) * 10)) * 1px));
          transform: translate(-50%, -50%) translate(0, calc((10 - (var(--pressed) * 10)) * 1px));
  -webkit-transition: background var(--transition), -webkit-transform var(--transition);
  transition: background var(--transition), -webkit-transform var(--transition);
  transition: transform var(--transition), background var(--transition);
  transition: transform var(--transition), background var(--transition), -webkit-transform var(--transition);
  z-index: -1;
}
.switch__button-face {
  border: 4px solid var(--faceplate-light);
  height: 100%;
  width: 100%;
  background: var(--faceplate);
  border-radius: 100%;
  -webkit-transform: rotate(calc(var(--rotation, 0) * 1deg));
          transform: rotate(calc(var(--rotation, 0) * 1deg));
  -webkit-transition: background var(--transition);
  transition: background var(--transition);
}
.switch__button-dim-marker {
  position: absolute;
  left: 50%;
  height: 44px;
  width: 44px;
  border-radius: 50%;
  top: 10%;
  -webkit-transform: translate(-50%, -90%);
          transform: translate(-50%, -90%);
  cursor: var(--cursor, 'grab');
}
.switch__button-dim-marker:after {
  content: '';
  background: hsl(0, 100%, calc((0 + var(--light)) * 1%));
  height: 10px;
  width: 10px;
  border-radius: 100%;
  position: absolute;
  top: 100%;
  left: 50%;
  -webkit-transition: background var(--transition);
  transition: background var(--transition);
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}

JavaScript

/**
 * Grab the angle between two points
 * @param {Object} event - pointer event for current coords
 * @param {Object} element - element to use as center point
 * @param {Number} buffer - buffer so that angle doesn't allow handle + track overlap
 */
const getAngle = (event, element) => {
  const { clientX: x, clientY: y } =
    event.touches && event.touches.length ? event.touches[0] : event
  const {
    x: handleX,
    y: handleY,
    width: handleWidth,
    height: handleHeight,
  } = element.getBoundingClientRect()
  const handleCenterPoint = {
    x: handleX + handleWidth / 2,
    y: handleY + handleHeight / 2,
  }
  const angle =
    (Math.atan2(handleCenterPoint.y - y, handleCenterPoint.x - x) * 180) /
    Math.PI
  return angle
}

const button = document.querySelector('.switch__button')
const dimmer = document.querySelector('.switch__button-dim-marker')

let DOWN_EVENT = 'mousedown'
let MOVE_EVENT = 'mousemove'
let UP_EVENT = 'mouseup'

const AUDIO = {
  ON: new Audio('https://www.jq22.com/newjs/switch-on2.mp3'),
  OFF: new Audio('https://www.jq22.com/newjs/switch-off2.mp3'),
}
if (window.PointerEvent) {
  // PointerEvent, Chrome
  DOWN_EVENT = 'pointerdown'
  MOVE_EVENT = 'pointermove'
  UP_EVENT = 'pointerup'
} else if ('ontouchstart' in window) {
  // Touch Events, iOS Safari
  DOWN_EVENT = 'touchstart'
  MOVE_EVENT = 'touchmove'
  UP_EVENT = 'touchend'
}

let ON = true
const BUFFER = 45
const VARIANTS = {
  ON: 60,
  OFF: 10,
  LOWER: 15,
  UPPER: 60,
  DIMMED: 0.5,
}

const setLight = () => {
  document.documentElement.style.setProperty(
    '--light',
    ON
      ? VARIANTS.LOWER + (VARIANTS.UPPER - VARIANTS.LOWER) * VARIANTS.DIMMED
      : VARIANTS.OFF
  )
}

const dim = e => {
  let rotation
  const angle = getAngle(e, button)
  if (angle > 0) {
    rotation = angle - 90
  } else {
    rotation = 270 + angle
    if (angle > -(90 + BUFFER) && angle < -(90 - BUFFER) && angle < -90) {
      rotation = 270 - (90 + BUFFER)
      VARIANTS.DIMMED = 1
    }
    if (angle > -(90 + BUFFER) && angle < -(90 - BUFFER) && angle > -90) {
      rotation = 270 - (90 - BUFFER)
      VARIANTS.DIMMED = 0
    }
  }
  // console.info(rotation)

// Lets work out the dimming here
  // If angle is rotation is greater than 0 and less than 180 - BUFFER
  // Dim is 0.5 + (angle / 135deg) * 0.5
  if (rotation > 0 && rotation < 180 - BUFFER) {
    VARIANTS.DIMMED = 0.5 + (rotation / (180 - BUFFER)) * 0.5
  } else if (rotation < 0) {
    // There's 180 - BUFFER degrees to play with but we know we have 90 degrees here.
    VARIANTS.DIMMED = 0.5 - Math.abs(rotation / (180 - BUFFER)) * 0.5
  } else if (rotation > 180 + BUFFER && rotation < 270) {
    VARIANTS.DIMMED =
      ((rotation - (180 + BUFFER)) / (180 - (90 + BUFFER))) *
      ((BUFFER / (180 - BUFFER)) * 0.5)
  }
  button.style.setProperty('--rotation', rotation)
  setLight()
}

const endDim = () => {
  document.documentElement.style.setProperty('--cursor', 'initial')
  dimmer.style.setProperty('--cursor', 'grab')
  document.body.removeEventListener(MOVE_EVENT, dim)
  document.body.removeEventListener(UP_EVENT, endDim)
}

const execute = e => {
  ON = !ON
  button.style.setProperty('--pressed', 0)
  setLight()
  if (e.target !== dimmer && ON) {
    document.documentElement.style.setProperty('--hue', Math.random() * 360)
  }
  AUDIO.OFF.play()
  document.body.removeEventListener(UP_EVENT, execute)
}
const toggleLight = () => {
  AUDIO.ON.play()
  button.style.setProperty('--pressed', 1)
  document.body.addEventListener(UP_EVENT, execute)
}

const initDim = e => {
  e.stopPropagation()
  document.documentElement.style.setProperty('--cursor', 'grabbing')
  dimmer.style.setProperty('--cursor', 'grabbing')
  document.body.addEventListener(MOVE_EVENT, dim)
  document.body.addEventListener(UP_EVENT, endDim)
}

dimmer.addEventListener(DOWN_EVENT, initDim)
button.addEventListener(DOWN_EVENT, toggleLight)
setLight()

粒子时间文字 hover canvas 3d 游戏音乐火焰水波轮播图鼠标跟随动画 css 加载动画导航菜单按钮滑块 tab 弹出层统计图 svg