Created
February 17, 2023 14:03
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@use "sass:list"; | |
@use "sass:map"; | |
@use "sass:math"; | |
@use "sass:string"; | |
$mass: 1 !default; | |
$stiffness: 100 !default; | |
$damping: 15 !default; | |
$steps: 50 !default; | |
$preset-gentle: ( | |
mass: 1, | |
stiffness: 100, | |
damping: 15, | |
); | |
$preset-quick: ( | |
mass: 1, | |
stiffness: 300, | |
damping: 20, | |
); | |
$preset-bouncy: ( | |
mass: 1, | |
stiffness: 600, | |
damping: 15, | |
); | |
$preset-slow: ( | |
mass: 1, | |
stiffness: 80, | |
damping: 20, | |
); | |
@function spring($t, $mass: $mass, $stiffness: $stiffness, $damping: $damping) { | |
$w0: math.sqrt($stiffness / $mass); | |
$zeta: $damping / (2 * math.sqrt($stiffness * $mass)); | |
$wd: if($zeta < 1, $w0 * math.sqrt(1 - $zeta * $zeta), 0); | |
$a: 1; | |
$b: if($zeta < 1, $zeta * $w0 / $wd, $w0); | |
@if $zeta < 1 { | |
@return 1 - math.pow(math.$e, -$t * $zeta * $w0) * ($a * math.cos($wd * $t) + $b * math.sin($wd * $t)); | |
} | |
@return 1 - ($a + $b * $t) * math.pow(math.$e, -$t * $w0); | |
} | |
@function lerp($from, $to, $t) { | |
@return $from * (1 - $t) + $to * $t; | |
} | |
@function precision($float, $digits: 1) { | |
$pow: math.pow(10, $digits); | |
@return round($float * $pow) / $pow; | |
} | |
@function keyframes($properties, $steps: $steps, $args...) { | |
$keyframes: (); | |
@for $i from 0 through $steps { | |
$percentage: $i * 100 / $steps + '%'; | |
$keyframe: (); | |
$transform: ''; | |
@each $property, $values in $properties { | |
$from: list.nth($values, 1); | |
$to: list.nth($values, 2); | |
$value: if($i == 0, $from, if($i == $steps, $to, precision(lerp($from, $to, spring($i / $steps, $args...))))); | |
@if list.index($transforms, $property) { | |
$transform: "#{$transform} #{$property}(#{$value})"; | |
} @else { | |
$keyframe: map.set($keyframe, $property, $value); | |
} | |
} | |
$keyframe: map.set($keyframe, transform, string.slice(string.unquote($transform), 2, -1)); | |
$keyframes: map.set($keyframes, $percentage, $keyframe); | |
} | |
// Optimize by removing consecutive values | |
$last: (); | |
$before-last: (); | |
@each $keyframe, $properties in $keyframes { | |
@each $property, $value in $properties { | |
@if map.get($last, $property, value) == $value and map.get($before-last, $property, value) == $value { | |
$keyframes: map.deep-remove($keyframes, map.get($last, $property, keyframe), $property); | |
} | |
$before-last: map.set($before-last, $property, map.get($last, $property)); | |
$last: map.set($last, $property, (keyframe: $keyframe, value: $value)); | |
} | |
} | |
@return $keyframes; | |
}; | |
$transforms: ('translateX', 'translateY', 'translateZ', 'rotate', 'rotateX', 'rotateY', 'rotateZ', 'scale', 'scaleX', 'scaleY', 'scaleZ', 'skew', 'skewX', 'skewY', 'perspective'); | |
@mixin keyframes($name, $properties, $steps: $steps, $args...) { | |
$keyframes: keyframes($properties, $steps, $args...); | |
@keyframes #{$name} { | |
@each $keyframe, $properties in $keyframes { | |
#{$keyframe} { | |
@each $property, $value in $properties { | |
#{$property}: $value; | |
} | |
} | |
} | |
} | |
} | |
@include keyframes(red, ( | |
opacity: (0, 1), | |
translateX: (0%, 100%), | |
rotate: (0deg, 1turn), | |
scale: (1, 1.5), | |
)); | |
@include keyframes(blue, ( | |
opacity: (0, 1), | |
--translate: (0%, 100%), | |
--rotate: (0deg, 1turn), | |
--scale: (1, 1.5), | |
), $preset-bouncy...); | |
@property --translate { | |
initial-value: 0%; | |
inherits: false; | |
syntax: '<percentage>'; | |
} | |
@property --rotate { | |
initial-value: 0deg; | |
inherits: false; | |
syntax: '<angle>'; | |
} | |
@property --scale { | |
initial-value: 1; | |
inherits: false; | |
syntax: '<number>'; | |
} | |
div { | |
width: 100px; | |
height: 100px; | |
animation-timing-function: linear; | |
animation-duration: 800ms; | |
animation-fill-mode: both; | |
&:first-child { | |
background: red; | |
:hover & { | |
animation-name: red; | |
} | |
} | |
&:last-child { | |
background: blue; | |
transform: translateX(var(--translate)) rotate(var(--rotate)) scale(var(--scale)); | |
:hover & { | |
animation-name: blue; | |
} | |
} | |
} | |
body { | |
display: flex; | |
flex-direction: column; | |
align-items: center; | |
justify-content: space-around; | |
height: 100vh; | |
margin: 0; | |
} |
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<div></div> | |
<div></div> |
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@keyframes red { | |
0% { | |
opacity: 0; | |
transform: translateX(0%) rotate(0deg) scale(1); | |
} | |
2% { | |
opacity: 0; | |
transform: translateX(1.8%) rotate(6.5deg) scale(1); | |
} | |
4% { | |
opacity: 0.1; | |
transform: translateX(6.5%) rotate(23.5deg) scale(1); | |
} | |
6% { | |
opacity: 0.1; | |
transform: translateX(13.2%) rotate(47.7deg) scale(1.1); | |
} | |
8% { | |
opacity: 0.2; | |
transform: translateX(21.2%) rotate(76.4deg) scale(1.1); | |
} | |
10% { | |
opacity: 0.3; | |
transform: translateX(29.8%) rotate(107.4deg) scale(1.1); | |
} | |
12% { | |
opacity: 0.4; | |
transform: translateX(38.6%) rotate(139deg) scale(1.2); | |
} | |
14% { | |
opacity: 0.5; | |
transform: translateX(47.3%) rotate(170.1deg) scale(1.2); | |
} | |
16% { | |
opacity: 0.6; | |
transform: translateX(55.5%) rotate(199.7deg) scale(1.3); | |
} | |
18% { | |
opacity: 0.6; | |
transform: translateX(63.1%) rotate(227.1deg) scale(1.3); | |
} | |
20% { | |
opacity: 0.7; | |
transform: translateX(70%) rotate(252deg) scale(1.3); | |
} | |
22% { | |
opacity: 0.8; | |
transform: translateX(76.2%) rotate(274.2deg) scale(1.4); | |
} | |
24% { | |
opacity: 0.8; | |
transform: translateX(81.5%) rotate(293.5deg) scale(1.4); | |
} | |
26% { | |
opacity: 0.9; | |
transform: translateX(86.2%) rotate(310.2deg) scale(1.4); | |
} | |
28% { | |
transform: translateX(90.1%) rotate(324.2deg) scale(1.5); | |
} | |
30% { | |
opacity: 0.9; | |
transform: translateX(93.3%) rotate(335.8deg) scale(1.5); | |
} | |
32% { | |
opacity: 1; | |
transform: translateX(95.9%) rotate(345.3deg) scale(1.5); | |
} | |
34% { | |
transform: translateX(98%) rotate(352.8deg) scale(1.5); | |
} | |
36% { | |
transform: translateX(99.6%) rotate(358.6deg) scale(1.5); | |
} | |
38% { | |
transform: translateX(100.8%) rotate(363deg) scale(1.5); | |
} | |
40% { | |
transform: translateX(101.7%) rotate(366.1deg) scale(1.5); | |
} | |
42% { | |
transform: translateX(102.3%) rotate(368.2deg) scale(1.5); | |
} | |
44% { | |
transform: translateX(102.6%) rotate(369.5deg) scale(1.5); | |
} | |
46% { | |
transform: translateX(102.8%) rotate(370.1deg) scale(1.5); | |
} | |
48% { | |
transform: translateX(102.8%) rotate(370.2deg) scale(1.5); | |
} | |
50% { | |
transform: translateX(102.8%) rotate(369.9deg) scale(1.5); | |
} | |
52% { | |
transform: translateX(102.6%) rotate(369.4deg) scale(1.5); | |
} | |
54% { | |
transform: translateX(102.4%) rotate(368.7deg) scale(1.5); | |
} | |
56% { | |
transform: translateX(102.2%) rotate(367.8deg) scale(1.5); | |
} | |
58% { | |
transform: translateX(101.9%) rotate(366.9deg) scale(1.5); | |
} | |
60% { | |
transform: translateX(101.7%) rotate(366deg) scale(1.5); | |
} | |
62% { | |
transform: translateX(101.4%) rotate(365.2deg) scale(1.5); | |
} | |
64% { | |
transform: translateX(101.2%) rotate(364.3deg) scale(1.5); | |
} | |
66% { | |
transform: translateX(101%) rotate(363.6deg) scale(1.5); | |
} | |
68% { | |
transform: translateX(100.8%) rotate(362.9deg) scale(1.5); | |
} | |
70% { | |
transform: translateX(100.6%) rotate(362.3deg) scale(1.5); | |
} | |
72% { | |
transform: translateX(100.5%) rotate(361.8deg) scale(1.5); | |
} | |
74% { | |
transform: translateX(100.4%) rotate(361.3deg) scale(1.5); | |
} | |
76% { | |
transform: translateX(100.3%) rotate(360.9deg) scale(1.5); | |
} | |
78% { | |
transform: translateX(100.2%) rotate(360.6deg) scale(1.5); | |
} | |
80% { | |
transform: translateX(100.1%) rotate(360.4deg) scale(1.5); | |
} | |
82% { | |
transform: translateX(100%) rotate(360.2deg) scale(1.5); | |
} | |
84% { | |
transform: translateX(100%) rotate(360deg) scale(1.5); | |
} | |
86% { | |
transform: translateX(100%) rotate(359.9deg) scale(1.5); | |
} | |
88% { | |
transform: translateX(99.9%) rotate(359.8deg) scale(1.5); | |
} | |
90% { | |
transform: translateX(99.9%) rotate(359.8deg) scale(1.5); | |
} | |
92% { | |
transform: translateX(99.9%) rotate(359.7deg) scale(1.5); | |
} | |
98% { | |
transform: translateX(99.9%) rotate(359.7deg) scale(1.5); | |
} | |
100% { | |
opacity: 1; | |
transform: translateX(100%) rotate(1turn) scale(1.5); | |
} | |
} | |
@keyframes blue { | |
0% { | |
opacity: 0; | |
--translate: 0%; | |
--rotate: 0deg; | |
--scale: 1; | |
} | |
2% { | |
opacity: 0.1; | |
--translate: 10.7%; | |
--rotate: 38.4deg; | |
--scale: 1.1; | |
} | |
4% { | |
opacity: 0.4; | |
--translate: 36.7%; | |
--rotate: 132.2deg; | |
--scale: 1.2; | |
} | |
6% { | |
opacity: 0.7; | |
--translate: 68.9%; | |
--rotate: 248deg; | |
--scale: 1.3; | |
} | |
8% { | |
opacity: 1; | |
--translate: 99%; | |
--rotate: 356.6deg; | |
--scale: 1.5; | |
} | |
10% { | |
opacity: 1.2; | |
--translate: 121.6%; | |
--rotate: 437.7deg; | |
--scale: 1.6; | |
} | |
12% { | |
opacity: 1.3; | |
--translate: 133.9%; | |
--rotate: 482deg; | |
--scale: 1.7; | |
} | |
14% { | |
opacity: 1.4; | |
--translate: 136.1%; | |
--rotate: 490deg; | |
} | |
16% { | |
opacity: 1.3; | |
--translate: 130.4%; | |
--rotate: 469.5deg; | |
--scale: 1.7; | |
} | |
18% { | |
opacity: 1.2; | |
--translate: 120%; | |
--rotate: 432.1deg; | |
--scale: 1.6; | |
} | |
20% { | |
opacity: 1.1; | |
--translate: 108.3%; | |
--rotate: 389.7deg; | |
--scale: 1.5; | |
} | |
22% { | |
opacity: 1; | |
--translate: 97.9%; | |
--rotate: 352.3deg; | |
} | |
24% { | |
opacity: 0.9; | |
--translate: 90.6%; | |
--rotate: 326.1deg; | |
--scale: 1.5; | |
} | |
26% { | |
--translate: 87.1%; | |
--rotate: 313.6deg; | |
--scale: 1.4; | |
} | |
28% { | |
--translate: 87.2%; | |
--rotate: 313.8deg; | |
} | |
30% { | |
--translate: 89.8%; | |
--rotate: 323.3deg; | |
--scale: 1.4; | |
} | |
32% { | |
opacity: 0.9; | |
--translate: 93.8%; | |
--rotate: 337.8deg; | |
--scale: 1.5; | |
} | |
34% { | |
opacity: 1; | |
--translate: 98.1%; | |
--rotate: 353.1deg; | |
} | |
36% { | |
--translate: 101.6%; | |
--rotate: 365.8deg; | |
} | |
38% { | |
--translate: 103.9%; | |
--rotate: 374deg; | |
} | |
40% { | |
--translate: 104.8%; | |
--rotate: 377.3deg; | |
} | |
42% { | |
--translate: 104.5%; | |
--rotate: 376.2deg; | |
} | |
44% { | |
--translate: 103.4%; | |
--rotate: 372.1deg; | |
} | |
46% { | |
--translate: 101.8%; | |
--rotate: 366.6deg; | |
} | |
48% { | |
--translate: 100.3%; | |
--rotate: 361.2deg; | |
} | |
50% { | |
--translate: 99.1%; | |
--rotate: 356.9deg; | |
} | |
52% { | |
--translate: 98.4%; | |
--rotate: 354.4deg; | |
} | |
54% { | |
--translate: 98.2%; | |
--rotate: 353.7deg; | |
} | |
56% { | |
--translate: 98.5%; | |
--rotate: 354.4deg; | |
} | |
58% { | |
--translate: 98.9%; | |
--rotate: 356.1deg; | |
} | |
60% { | |
--translate: 99.5%; | |
--rotate: 358.1deg; | |
} | |
62% { | |
--translate: 100%; | |
--rotate: 360deg; | |
} | |
64% { | |
--translate: 100.4%; | |
--rotate: 361.4deg; | |
} | |
66% { | |
--translate: 100.6%; | |
--rotate: 362.2deg; | |
} | |
68% { | |
--translate: 100.6%; | |
--rotate: 362.3deg; | |
} | |
70% { | |
--translate: 100.5%; | |
--rotate: 361.9deg; | |
} | |
72% { | |
--translate: 100.3%; | |
--rotate: 361.2deg; | |
} | |
74% { | |
--translate: 100.1%; | |
--rotate: 360.5deg; | |
} | |
76% { | |
--translate: 100%; | |
--rotate: 359.8deg; | |
} | |
78% { | |
--translate: 99.8%; | |
--rotate: 359.4deg; | |
} | |
80% { | |
--rotate: 359.2deg; | |
} | |
82% { | |
--rotate: 359.2deg; | |
} | |
84% { | |
--translate: 99.8%; | |
--rotate: 359.4deg; | |
} | |
86% { | |
--translate: 99.9%; | |
--rotate: 359.6deg; | |
} | |
88% { | |
--translate: 100%; | |
--rotate: 359.9deg; | |
} | |
90% { | |
--translate: 100%; | |
--rotate: 360.1deg; | |
} | |
92% { | |
--translate: 100.1%; | |
--rotate: 360.3deg; | |
} | |
96% { | |
--rotate: 360.3deg; | |
} | |
98% { | |
--translate: 100.1%; | |
--rotate: 360.2deg; | |
} | |
100% { | |
opacity: 1; | |
--translate: 100%; | |
--rotate: 1turn; | |
--scale: 1.5; | |
} | |
} | |
@property --translate { | |
initial-value: 0%; | |
inherits: false; | |
syntax: "<percentage>"; | |
} | |
@property --rotate { | |
initial-value: 0deg; | |
inherits: false; | |
syntax: "<angle>"; | |
} | |
@property --scale { | |
initial-value: 1; | |
inherits: false; | |
syntax: "<number>"; | |
} | |
div { | |
width: 100px; | |
height: 100px; | |
animation-timing-function: linear; | |
animation-duration: 10s; | |
animation-fill-mode: both; | |
} | |
div:first-child { | |
background: red; | |
} | |
:hover div:first-child { | |
animation-name: red; | |
} | |
div:last-child { | |
background: blue; | |
transform: translateX(var(--translate)) rotate(var(--rotate)) scale(var(--scale)); | |
} | |
:hover div:last-child { | |
animation-name: blue; | |
} | |
body { | |
display: flex; | |
flex-direction: column; | |
align-items: center; | |
justify-content: space-around; | |
height: 100vh; | |
margin: 0; | |
} |
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{ | |
"sass": { | |
"compiler": "dart-sass/1.32.12", | |
"extensions": {}, | |
"syntax": "SCSS", | |
"outputStyle": "expanded" | |
}, | |
"autoprefixer": false | |
} |
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