Button by JkHuger

#212121

1.sparkle-button {
2  --active: 0;
3  --bg: radial-gradient(
4			40% 50% at center 100%,
5			hsl(270 calc(var(--active) * 97%) 72% / var(--active)),
6			transparent
7		),
8		radial-gradient(
9			80% 100% at center 120%,
10			hsl(260 calc(var(--active) * 97%) 70% / var(--active)),
11			transparent
12		),
13		hsl(260 calc(var(--active) * 97%) calc((var(--active) * 44%) + 12%));
14  background: var(--bg);
15  font-size: 1.2rem;
16  font-weight: 500;
17  border: 0;
18  cursor: pointer;
19  padding: 1em 1em;
20  display: flex;
21  align-items: center;
22  gap: 0.25em;
23  white-space: nowrap;
24  border-radius: 100px;
25  position: relative;
26  box-shadow: 0 0 calc(var(--active) * 3em) calc(var(--active) * 1em) hsl(260 97% 61% / 0.75),
27		0 0em 0 0 hsl(260 calc(var(--active) * 97%) calc((var(--active) * 50%) + 30%)) inset,
28		0 -0.05em 0 0 hsl(260 calc(var(--active) * 97%) calc(var(--active) * 60%)) inset;
29  transition: box-shadow var(--transition), scale var(--transition), background var(--transition);
30  scale: calc(1 + (var(--active) * 0.1));
31  transition: .3s;
32}
33
34.sparkle-button:active {
35  scale: 1;
36  transition: .3s;
37}
38
39.sparkle path {
40  color: hsl(0 0% calc((var(--active, 0) * 70%) + var(--base)));
41  transform-box: fill-box;
42  transform-origin: center;
43  fill: currentColor;
44  stroke: currentColor;
45  animation-delay: calc((var(--transition) * 1.5) + (var(--delay) * 1s));
46  animation-duration: 0.6s;
47  transition: color var(--transition);
48}
49
50.sparkle-button:is(:hover, :focus-visible) path {
51  animation-name: bounce;
52}
53
54@keyframes bounce {
55  35%, 65% {
56    scale: var(--scale);
57  }
58}
59
60.sparkle path:nth-of-type(1) {
61  --scale: 0.5;
62  --delay: 0.1;
63  --base: 40%;
64}
65
66.sparkle path:nth-of-type(2) {
67  --scale: 1.5;
68  --delay: 0.2;
69  --base: 20%;
70}
71
72.sparkle path:nth-of-type(3) {
73  --scale: 2.5;
74  --delay: 0.35;
75  --base: 30%;
76}
77
78.sparkle-button:before {
79  content: "";
80  position: absolute;
81  inset: -0.2em;
82  z-index: -1;
83  border: 0.25em solid hsl(260 97% 50% / 0.5);
84  border-radius: 100px;
85  opacity: var(--active, 0);
86  transition: opacity var(--transition);
87}
88
89.spark {
90  position: absolute;
91  inset: 0;
92  border-radius: 100px;
93  rotate: 0deg;
94  overflow: hidden;
95  mask: linear-gradient(white, transparent 50%);
96  animation: flip calc(var(--spark) * 2) infinite steps(2, end);
97}
98
99@keyframes flip {
100  to {
101    rotate: 360deg;
102  }
103}
104
105.spark:before {
106  content: "";
107  position: absolute;
108  width: 200%;
109  aspect-ratio: 1;
110  top: 0%;
111  left: 50%;
112  z-index: -1;
113  translate: -50% -15%;
114  rotate: 0;
115  transform: rotate(-90deg);
116  opacity: calc((var(--active)) + 0.4);
117  background: conic-gradient(
118		from 0deg,
119		transparent 0 340deg,
120		white 360deg
121	);
122  transition: opacity var(--transition);
123  animation: rotate var(--spark) linear infinite both;
124}
125
126.spark:after {
127  content: "";
128  position: absolute;
129  inset: var(--cut);
130  border-radius: 100px;
131}
132
133.backdrop {
134  position: absolute;
135  inset: var(--cut);
136  background: var(--bg);
137  border-radius: 100px;
138  transition: background var(--transition);
139}
140
141@keyframes rotate {
142  to {
143    transform: rotate(90deg);
144  }
145}
146
147@supports(selector(:has(:is(+ *)))) {
148  body:has(button:is(:hover, :focus-visible)) {
149    --active: 1;
150    --play-state: running;
151  }
152
153  .bodydrop {
154    display: none;
155  }
156}
157
158.sparkle-button:is(:hover, :focus-visible) ~ :is(.bodydrop, .particle-pen) {
159  --active: 1;
160  --play-state: runnin;
161}
162
163.sparkle-button:is(:hover, :focus-visible) {
164  --active: 1;
165  --play-state: running;
166}
167
168.sp {
169  position: relative;
170}
171
172.particle-pen {
173  position: absolute;
174  width: 200%;
175  aspect-ratio: 1;
176  top: 50%;
177  left: 50%;
178  translate: -50% -50%;
179  -webkit-mask: radial-gradient(white, transparent 65%);
180  z-index: -1;
181  opacity: var(--active, 0);
182  transition: opacity var(--transition);
183}
184
185.particle {
186  fill: white;
187  width: calc(var(--size, 0.25) * 1rem);
188  aspect-ratio: 1;
189  position: absolute;
190  top: calc(var(--y) * 1%);
191  left: calc(var(--x) * 1%);
192  opacity: var(--alpha, 1);
193  animation: float-out calc(var(--duration, 1) * 1s) calc(var(--delay) * -1s) infinite linear;
194  transform-origin: var(--origin-x, 1000%) var(--origin-y, 1000%);
195  z-index: -1;
196  animation-play-state: var(--play-state, paused);
197}
198
199.particle path {
200  fill: hsl(0 0% 90%);
201  stroke: none;
202}
203
204.particle:nth-of-type(even) {
205  animation-direction: reverse;
206}
207
208@keyframes float-out {
209  to {
210    rotate: 360deg;
211  }
212}
213
214.text {
215  translate: 2% -6%;
216  letter-spacing: 0.01ch;
217  background: linear-gradient(90deg, hsl(0 0% calc((var(--active) * 100%) + 65%)), hsl(0 0% calc((var(--active) * 100%) + 26%)));
218  -webkit-background-clip: text;
219  color: transparent;
220  transition: background var(--transition);
221}
222
223.sparkle-button svg {
224  inline-size: 1.25em;
225  translate: -25% -5%;
226}

.sparkle-button {
  --active: 0;
  --bg: radial-gradient(
			40% 50% at center 100%,
			hsl(270 calc(var(--active) * 97%) 72% / var(--active)),
			transparent
		),
		radial-gradient(
			80% 100% at center 120%,
			hsl(260 calc(var(--active) * 97%) 70% / var(--active)),
			transparent
		),
		hsl(260 calc(var(--active) * 97%) calc((var(--active) * 44%) + 12%));
  background: var(--bg);
  font-size: 1.2rem;
  font-weight: 500;
  border: 0;
  cursor: pointer;
  padding: 1em 1em;
  display: flex;
  align-items: center;
  gap: 0.25em;
  white-space: nowrap;
  border-radius: 100px;
  position: relative;
  box-shadow: 0 0 calc(var(--active) * 3em) calc(var(--active) * 1em) hsl(260 97% 61% / 0.75),
		0 0em 0 0 hsl(260 calc(var(--active) * 97%) calc((var(--active) * 50%) + 30%)) inset,
		0 -0.05em 0 0 hsl(260 calc(var(--active) * 97%) calc(var(--active) * 60%)) inset;
  transition: box-shadow var(--transition), scale var(--transition), background var(--transition);
  scale: calc(1 + (var(--active) * 0.1));
  transition: .3s;
}

.sparkle-button:active {
  scale: 1;
  transition: .3s;
}

.sparkle path {
  color: hsl(0 0% calc((var(--active, 0) * 70%) + var(--base)));
  transform-box: fill-box;
  transform-origin: center;
  fill: currentColor;
  stroke: currentColor;
  animation-delay: calc((var(--transition) * 1.5) + (var(--delay) * 1s));
  animation-duration: 0.6s;
  transition: color var(--transition);
}

.sparkle-button:is(:hover, :focus-visible) path {
  animation-name: bounce;
}

@keyframes bounce {
  35%, 65% {
    scale: var(--scale);
  }
}

.sparkle path:nth-of-type(1) {
  --scale: 0.5;
  --delay: 0.1;
  --base: 40%;
}

.sparkle path:nth-of-type(2) {
  --scale: 1.5;
  --delay: 0.2;
  --base: 20%;
}

.sparkle path:nth-of-type(3) {
  --scale: 2.5;
  --delay: 0.35;
  --base: 30%;
}

.sparkle-button:before {
  content: "";
  position: absolute;
  inset: -0.2em;
  z-index: -1;
  border: 0.25em solid hsl(260 97% 50% / 0.5);
  border-radius: 100px;
  opacity: var(--active, 0);
  transition: opacity var(--transition);
}

.spark {
  position: absolute;
  inset: 0;
  border-radius: 100px;
  rotate: 0deg;
  overflow: hidden;
  mask: linear-gradient(white, transparent 50%);
  animation: flip calc(var(--spark) * 2) infinite steps(2, end);
}

@keyframes flip {
  to {
    rotate: 360deg;
  }
}

.spark:before {
  content: "";
  position: absolute;
  width: 200%;
  aspect-ratio: 1;
  top: 0%;
  left: 50%;
  z-index: -1;
  translate: -50% -15%;
  rotate: 0;
  transform: rotate(-90deg);
  opacity: calc((var(--active)) + 0.4);
  background: conic-gradient(
		from 0deg,
		transparent 0 340deg,
		white 360deg
	);
  transition: opacity var(--transition);
  animation: rotate var(--spark) linear infinite both;
}

.spark:after {
  content: "";
  position: absolute;
  inset: var(--cut);
  border-radius: 100px;
}

.backdrop {
  position: absolute;
  inset: var(--cut);
  background: var(--bg);
  border-radius: 100px;
  transition: background var(--transition);
}

@keyframes rotate {
  to {
    transform: rotate(90deg);
  }
}

@supports(selector(:has(:is(+ *)))) {
  body:has(button:is(:hover, :focus-visible)) {
    --active: 1;
    --play-state: running;
  }

  .bodydrop {
    display: none;
  }
}

.sparkle-button:is(:hover, :focus-visible) ~ :is(.bodydrop, .particle-pen) {
  --active: 1;
  --play-state: runnin;
}

.sparkle-button:is(:hover, :focus-visible) {
  --active: 1;
  --play-state: running;
}

.sp {
  position: relative;
}

.particle-pen {
  position: absolute;
  width: 200%;
  aspect-ratio: 1;
  top: 50%;
  left: 50%;
  translate: -50% -50%;
  -webkit-mask: radial-gradient(white, transparent 65%);
  z-index: -1;
  opacity: var(--active, 0);
  transition: opacity var(--transition);
}

.particle {
  fill: white;
  width: calc(var(--size, 0.25) * 1rem);
  aspect-ratio: 1;
  position: absolute;
  top: calc(var(--y) * 1%);
  left: calc(var(--x) * 1%);
  opacity: var(--alpha, 1);
  animation: float-out calc(var(--duration, 1) * 1s) calc(var(--delay) * -1s) infinite linear;
  transform-origin: var(--origin-x, 1000%) var(--origin-y, 1000%);
  z-index: -1;
  animation-play-state: var(--play-state, paused);
}

.particle path {
  fill: hsl(0 0% 90%);
  stroke: none;
}

.particle:nth-of-type(even) {
  animation-direction: reverse;
}

@keyframes float-out {
  to {
    rotate: 360deg;
  }
}

.text {
  translate: 2% -6%;
  letter-spacing: 0.01ch;
  background: linear-gradient(90deg, hsl(0 0% calc((var(--active) * 100%) + 65%)), hsl(0 0% calc((var(--active) * 100%) + 26%)));
  -webkit-background-clip: text;
  color: transparent;
  transition: background var(--transition);
}

.sparkle-button svg {
  inline-size: 1.25em;
  translate: -25% -5%;
}

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Original Creator: JHEY

This UI element is reposted from an external origin. Show them some appreciation!

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MIT License

Copyright - 2024 JHEY - https://codepen.io/jh3y/pen/LYJMPBL 
Copyright - 2024 Jhey - https://codepen.io/jh3y/pen/LYJMPBL 

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.