Background Beams

Multiple background beams that follow a path of SVG, makes a good hero section background.

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Installation

Install Dependencies

npm i svelte-motion clsx tailwind-merge

Add util file

src/lib/utils/cn.ts
import { type ClassValue, clsx } from 'clsx';
import { twMerge } from 'tailwind-merge';
        
export function cn(...inputs: ClassValue[]) {
    return twMerge(clsx(inputs));
}

Add Tailwind CSS plugin for variable classes

tailwind.config.ts
import flattenColorPalette from 'tailwindcss/lib/util/flattenColorPalette';
import aspectRatio from '@tailwindcss/aspect-ratio';

const config = {
	// ... other properties
	plugins: [
		// ...other plugins
		aspectRatio,
		addVariablesForColors
	]
};

function addVariablesForColors({ addBase, theme }: any) {
	let allColors = flattenColorPalette(theme('colors'));
	let newVars = Object.fromEntries(
		Object.entries(allColors).map(([key, val]) => [`--${key}`, val])
	);

	addBase({
		':root': newVars
	});
}

Copy the source code

src/lib/components/ui/BackgroundBeams/BackgroundBeams.svelte
<script lang="ts">
	import { cn } from '@/utils';
	import { M, Motion } from 'svelte-motion';

	export let className: string | undefined = undefined;

	const paths = [
		'M-380 -189C-380 -189 -312 216 152 343C616 470 684 875 684 875',
		'M-373 -197C-373 -197 -305 208 159 335C623 462 691 867 691 867',
		'M-366 -205C-366 -205 -298 200 166 327C630 454 698 859 698 859',
		'M-359 -213C-359 -213 -291 192 173 319C637 446 705 851 705 851',
		'M-352 -221C-352 -221 -284 184 180 311C644 438 712 843 712 843',
		'M-345 -229C-345 -229 -277 176 187 303C651 430 719 835 719 835',
		'M-338 -237C-338 -237 -270 168 194 295C658 422 726 827 726 827',
		'M-331 -245C-331 -245 -263 160 201 287C665 414 733 819 733 819',
		'M-324 -253C-324 -253 -256 152 208 279C672 406 740 811 740 811',
		'M-317 -261C-317 -261 -249 144 215 271C679 398 747 803 747 803',
		'M-310 -269C-310 -269 -242 136 222 263C686 390 754 795 754 795',
		'M-303 -277C-303 -277 -235 128 229 255C693 382 761 787 761 787',
		'M-296 -285C-296 -285 -228 120 236 247C700 374 768 779 768 779',
		'M-289 -293C-289 -293 -221 112 243 239C707 366 775 771 775 771',
		'M-282 -301C-282 -301 -214 104 250 231C714 358 782 763 782 763',
		'M-275 -309C-275 -309 -207 96 257 223C721 350 789 755 789 755',
		'M-268 -317C-268 -317 -200 88 264 215C728 342 796 747 796 747',
		'M-261 -325C-261 -325 -193 80 271 207C735 334 803 739 803 739',
		'M-254 -333C-254 -333 -186 72 278 199C742 326 810 731 810 731',
		'M-247 -341C-247 -341 -179 64 285 191C749 318 817 723 817 723',
		'M-240 -349C-240 -349 -172 56 292 183C756 310 824 715 824 715',
		'M-233 -357C-233 -357 -165 48 299 175C763 302 831 707 831 707',
		'M-226 -365C-226 -365 -158 40 306 167C770 294 838 699 838 699',
		'M-219 -373C-219 -373 -151 32 313 159C777 286 845 691 845 691',
		'M-212 -381C-212 -381 -144 24 320 151C784 278 852 683 852 683',
		'M-205 -389C-205 -389 -137 16 327 143C791 270 859 675 859 675',
		'M-198 -397C-198 -397 -130 8 334 135C798 262 866 667 866 667',
		'M-191 -405C-191 -405 -123 0 341 127C805 254 873 659 873 659',
		'M-184 -413C-184 -413 -116 -8 348 119C812 246 880 651 880 651',
		'M-177 -421C-177 -421 -109 -16 355 111C819 238 887 643 887 643',
		'M-170 -429C-170 -429 -102 -24 362 103C826 230 894 635 894 635',
		'M-163 -437C-163 -437 -95 -32 369 95C833 222 901 627 901 627',
		'M-156 -445C-156 -445 -88 -40 376 87C840 214 908 619 908 619',
		'M-149 -453C-149 -453 -81 -48 383 79C847 206 915 611 915 611',
		'M-142 -461C-142 -461 -74 -56 390 71C854 198 922 603 922 603',
		'M-135 -469C-135 -469 -67 -64 397 63C861 190 929 595 929 595',
		'M-128 -477C-128 -477 -60 -72 404 55C868 182 936 587 936 587',
		'M-121 -485C-121 -485 -53 -80 411 47C875 174 943 579 943 579',
		'M-114 -493C-114 -493 -46 -88 418 39C882 166 950 571 950 571',
		'M-107 -501C-107 -501 -39 -96 425 31C889 158 957 563 957 563',
		'M-100 -509C-100 -509 -32 -104 432 23C896 150 964 555 964 555',
		'M-93 -517C-93 -517 -25 -112 439 15C903 142 971 547 971 547',
		'M-86 -525C-86 -525 -18 -120 446 7C910 134 978 539 978 539',
		'M-79 -533C-79 -533 -11 -128 453 -1C917 126 985 531 985 531',
		'M-72 -541C-72 -541 -4 -136 460 -9C924 118 992 523 992 523',
		'M-65 -549C-65 -549 3 -144 467 -17C931 110 999 515 999 515',
		'M-58 -557C-58 -557 10 -152 474 -25C938 102 1006 507 1006 507',
		'M-51 -565C-51 -565 17 -160 481 -33C945 94 1013 499 1013 499',
		'M-44 -573C-44 -573 24 -168 488 -41C952 86 1020 491 1020 491',
		'M-37 -581C-37 -581 31 -176 495 -49C959 78 1027 483 1027 483'
	];
</script>

<div
	class={cn(
		'absolute  inset-0 flex h-full  w-full items-center justify-center [mask-repeat:no-repeat] [mask-size:40px]',
		className
	)}
>
	<svg
		class=" pointer-events-none absolute z-0 h-full w-full"
		width="100%"
		height="100%"
		viewBox="0 0 696 316"
		fill="none"
		xmlns="http://www.w3.org/2000/svg"
	>
		<path
			d="M-380 -189C-380 -189 -312 216 152 343C616 470 684 875 684 875M-373 -197C-373 -197 -305 208 159 335C623 462 691 867 691 867M-366 -205C-366 -205 -298 200 166 327C630 454 698 859 698 859M-359 -213C-359 -213 -291 192 173 319C637 446 705 851 705 851M-352 -221C-352 -221 -284 184 180 311C644 438 712 843 712 843M-345 -229C-345 -229 -277 176 187 303C651 430 719 835 719 835M-338 -237C-338 -237 -270 168 194 295C658 422 726 827 726 827M-331 -245C-331 -245 -263 160 201 287C665 414 733 819 733 819M-324 -253C-324 -253 -256 152 208 279C672 406 740 811 740 811M-317 -261C-317 -261 -249 144 215 271C679 398 747 803 747 803M-310 -269C-310 -269 -242 136 222 263C686 390 754 795 754 795M-303 -277C-303 -277 -235 128 229 255C693 382 761 787 761 787M-296 -285C-296 -285 -228 120 236 247C700 374 768 779 768 779M-289 -293C-289 -293 -221 112 243 239C707 366 775 771 775 771M-282 -301C-282 -301 -214 104 250 231C714 358 782 763 782 763M-275 -309C-275 -309 -207 96 257 223C721 350 789 755 789 755M-268 -317C-268 -317 -200 88 264 215C728 342 796 747 796 747M-261 -325C-261 -325 -193 80 271 207C735 334 803 739 803 739M-254 -333C-254 -333 -186 72 278 199C742 326 810 731 810 731M-247 -341C-247 -341 -179 64 285 191C749 318 817 723 817 723M-240 -349C-240 -349 -172 56 292 183C756 310 824 715 824 715M-233 -357C-233 -357 -165 48 299 175C763 302 831 707 831 707M-226 -365C-226 -365 -158 40 306 167C770 294 838 699 838 699M-219 -373C-219 -373 -151 32 313 159C777 286 845 691 845 691M-212 -381C-212 -381 -144 24 320 151C784 278 852 683 852 683M-205 -389C-205 -389 -137 16 327 143C791 270 859 675 859 675M-198 -397C-198 -397 -130 8 334 135C798 262 866 667 866 667M-191 -405C-191 -405 -123 0 341 127C805 254 873 659 873 659M-184 -413C-184 -413 -116 -8 348 119C812 246 880 651 880 651M-177 -421C-177 -421 -109 -16 355 111C819 238 887 643 887 643M-170 -429C-170 -429 -102 -24 362 103C826 230 894 635 894 635M-163 -437C-163 -437 -95 -32 369 95C833 222 901 627 901 627M-156 -445C-156 -445 -88 -40 376 87C840 214 908 619 908 619M-149 -453C-149 -453 -81 -48 383 79C847 206 915 611 915 611M-142 -461C-142 -461 -74 -56 390 71C854 198 922 603 922 603M-135 -469C-135 -469 -67 -64 397 63C861 190 929 595 929 595M-128 -477C-128 -477 -60 -72 404 55C868 182 936 587 936 587M-121 -485C-121 -485 -53 -80 411 47C875 174 943 579 943 579M-114 -493C-114 -493 -46 -88 418 39C882 166 950 571 950 571M-107 -501C-107 -501 -39 -96 425 31C889 158 957 563 957 563M-100 -509C-100 -509 -32 -104 432 23C896 150 964 555 964 555M-93 -517C-93 -517 -25 -112 439 15C903 142 971 547 971 547M-86 -525C-86 -525 -18 -120 446 7C910 134 978 539 978 539M-79 -533C-79 -533 -11 -128 453 -1C917 126 985 531 985 531M-72 -541C-72 -541 -4 -136 460 -9C924 118 992 523 992 523M-65 -549C-65 -549 3 -144 467 -17C931 110 999 515 999 515M-58 -557C-58 -557 10 -152 474 -25C938 102 1006 507 1006 507M-51 -565C-51 -565 17 -160 481 -33C945 94 1013 499 1013 499M-44 -573C-44 -573 24 -168 488 -41C952 86 1020 491 1020 491M-37 -581C-37 -581 31 -176 495 -49C959 78 1027 483 1027 483M-30 -589C-30 -589 38 -184 502 -57C966 70 1034 475 1034 475M-23 -597C-23 -597 45 -192 509 -65C973 62 1041 467 1041 467M-16 -605C-16 -605 52 -200 516 -73C980 54 1048 459 1048 459M-9 -613C-9 -613 59 -208 523 -81C987 46 1055 451 1055 451M-2 -621C-2 -621 66 -216 530 -89C994 38 1062 443 1062 443M5 -629C5 -629 73 -224 537 -97C1001 30 1069 435 1069 435M12 -637C12 -637 80 -232 544 -105C1008 22 1076 427 1076 427M19 -645C19 -645 87 -240 551 -113C1015 14 1083 419 1083 419"
			stroke="url(#paint0_radial_242_278)"
			stroke-opacity="0.05"
			stroke-width="0.5"
		></path>

		{#each paths as path, index (index)}
			<Motion isSVG={true} let:motion>
				<path
					use:motion
					d={path}
					stroke={`url(#linearGradient-${index})`}
					stroke-opacity="0.4"
					stroke-width="0.5"
				></path>
			</Motion>
		{/each}
		<defs>
			{#each paths as path, index (`gradient-${index}`)}
				<Motion
					isSVG={true}
					let:motion
					animate={{
						x1: ['0%', '100%'],
						x2: ['0%', '95%'],
						y1: ['0%', '100%'],
						y2: ['0%', `${93 + Math.random() * 8}%`]
					}}
					transition={{
						duration: Math.random() * 10 + 10,
						ease: 'easeInOut',
						repeat: Infinity,
						delay: Math.random() * 10
					}}
				>
					<linearGradient
						use:motion
						id={`linearGradient-${index}`}
						x1="100%"
						x2="100%"
						y1="100%"
						y2="100%"
					>
						<stop stop-color="#18CCFC" stop-opacity="0"></stop>
						<stop stop-color="#18CCFC"></stop>
						<stop offset="32.5%" stop-color="#6344F5"></stop>
						<stop offset="100%" stop-color="#AE48FF" stop-opacity="0"></stop>
					</linearGradient>
				</Motion>
			{/each}

			<radialGradient
				id="paint0_radial_242_278"
				cx="0"
				cy="0"
				r="1"
				gradientUnits="userSpaceOnUse"
				gradientTransform="translate(352 34) rotate(90) scale(555 1560.62)"
			>
				<stop offset="0.0666667" stop-color="var(--neutral-300)"></stop>
				<stop offset="0.243243" stop-color="var(--neutral-300)"></stop>
				<stop offset="0.43594" stop-color="white" stop-opacity="0"></stop>
			</radialGradient>
		</defs>
	</svg>
</div>
src/lib/components/ui/BackgroundBeams/index.ts
import BackgroundBeams from './BackgroundBeams.svelte';

export { BackgroundBeams };

Props

BackgroundBeams
Prop Type Description
className string | undefined The class name of the Background Beams component.