功能：

进入界面会出现一个灯泡（下面有可以自由飘动也可以自由拉动的绳子），鼠标左键按住不松开可以拉动绳子，松开变化亮起，同时有拉响的清脆声响，把它放在web作业的设计里面绝对是非常非常不错的加分点！

代码：

dist/heml：

<!DOCTYPE html>

<head>

<title>CodePen - Tuggable Light Bulb! 💡(GSAP Draggable && MorphSVG)</title>

</head>

<body>

<defs>

</marker>

</marker>

</marker>

</marker>

</marker>

</clippath>

</clippath>

</defs>

</g>

</g>

</g>

</g>

</svg>

</body>

</html>

dist/css

* {

box-sizing: border-box;

}

:root {

--on: 0;

--bg: hsl(calc(200 - (var(--on) * 160)), calc((20 + (var(--on) * 50)) * 1%), calc((20 + (var(--on) * 60)) * 1%));

--cord: hsl(0, 0%, calc((60 - (var(--on) * 50)) * 1%));

--stroke: hsl(0, 0%, calc((60 - (var(--on) * 50)) * 1%));

--shine: hsla(0, 0%, 100%, calc(0.75 - (var(--on) * 0.5)));

--cap: hsl(0, 0%, calc((40 + (var(--on) * 30)) * 1%));

--filament: hsl(45, calc(var(--on) * 80%), calc((25 + (var(--on) * 75)) * 1%));

}

body {

min-height: 100vh;

display: flex;

align-items: center;

justify-content: center;

background: var(--bg);

}

.toggle-scene {

overflow: visible !important;

height: 50vmin;

position: absolute;

}

.toggle-scene__cord {

stroke: var(--cord);

cursor: move;

}

.toggle-scene__cord:nth-of-type(1) {

display: none;

}

.toggle-scene__cord:nth-of-type(2),

.toggle-scene__cord:nth-of-type(3),

.toggle-scene__cord:nth-of-type(4),

.toggle-scene__cord:nth-of-type(5) {

display: none;

}

.toggle-scene__cord-end {

stroke: var(--cord);

fill: var(--cord);

}

.toggle-scene__dummy-cord {

stroke-width: 6;

stroke: var(--cord);

}

.bulb__filament {

stroke: var(--filament);

}

.bulb__shine {

stroke: var(--shine);

}

.bulb__flash {

stroke: #f5e0a3;

display: none;

}

.bulb__bulb {

stroke: var(--stroke);

fill: hsla(calc(180 - (95 * var(--on))), 80%, 80%, calc(0.1 + (0.4 * var(--on))));

}

.bulb__cap {

fill: var(--cap);

}

.bulb__cap-shine {

fill: var(--shine);

}

.bulb__cap-outline {

stroke: var(--stroke);

}

dist/js

const {

gsap: { registerPlugin, set, to, timeline },

MorphSVGPlugin,

Draggable } =

window;

registerPlugin(MorphSVGPlugin);

// Used to calculate distance of "tug"

let startX;

let startY;

const AUDIO = {

CLICK: new Audio('C:\Users\123\Desktop\webdayornight') };

const STATE = {

ON: false };

const CORD_DURATION = 0.1;

const CORDS = document.querySelectorAll('.toggle-scene__cord');

const HIT = document.querySelector('.toggle-scene__hit-spot');

const DUMMY = document.querySelector('.toggle-scene__dummy-cord');

const DUMMY_CORD = document.querySelector('.toggle-scene__dummy-cord line');

const PROXY = document.createElement('div');

// set init position

const ENDX = DUMMY_CORD.getAttribute('x2');

const ENDY = DUMMY_CORD.getAttribute('y2');

const RESET = () => {

set(PROXY, {

x: ENDX,

y: ENDY });

};

RESET();

const CORD_TL = timeline({

paused: true,

onStart: () => {

STATE.ON = !STATE.ON;

set(document.documentElement, { '--on': STATE.ON ? 1 : 0 });

set([DUMMY, HIT], { display: 'none' });

set(CORDS[0], { display: 'block' });

AUDIO.CLICK.play();

onComplete: () => {

set([DUMMY, HIT], { display: 'block' });

set(CORDS[0], { display: 'none' });

RESET();

} });

for (let i = 1; i < CORDS.length; i++) {

CORD_TL.add(

to(CORDS[0], {

morphSVG: CORDS[i],

duration: CORD_DURATION,

repeat: 1,

yoyo: true }));

}

Draggable.create(PROXY, {

trigger: HIT,

type: 'x,y',

onPress: e => {

startX = e.x;

startY = e.y;

onDrag: function () {

set(DUMMY_CORD, {

attr: {

x2: this.x,

y2: this.y } });

onRelease: function (e) {

const DISTX = Math.abs(e.x - startX);

const DISTY = Math.abs(e.y - startY);

const TRAVELLED = Math.sqrt(DISTX * DISTX + DISTY * DISTY);

to(DUMMY_CORD, {

attr: { x2: ENDX, y2: ENDY },

duration: CORD_DURATION,

onComplete: () => {

if (TRAVELLED > 50) {

CORD_TL.restart();

} else {

RESET();

}

} });

src/pug

svg(class="toggle-scene" xmlns='http://www.w3.org/2000/svg' preserveaspectratio='xMinYMin' viewBox='0 0 197.451 481.081')

defs

marker#e(orient='auto' overflow='visible' refx='0' refy='0')