Add Squiggly component

This component lets you render text with a configurable squiggly line underneath

src/lib/components/Squiggly.svelte

@@ -0,0 +1,83 @@
+<script lang="ts">
+	import { onMount } from 'svelte'
+
+	export let text = 'Hello, Squiggly World!'
+	export let frequency = 0.4
+	export let amplitude = 1.5
+	export let color = '#ff0000'
+	export let distance = 3
+	export let lineWidth = 1.75
+
+	let textWidth = 0
+	let textElement: HTMLHeadingElement
+	let squigglyHeight: number
+
+	$: path = generatePath(textWidth, frequency, amplitude, distance)
+	$: squigglyHeight = distance + amplitude * 2 + lineWidth
+
+	onMount(() => {
+		updateTextWidth()
+	})
+
+	function updateTextWidth(): void {
+		textWidth = textElement?.getBoundingClientRect().width || 0
+	}
+
+	function generatePath(width: number, freq: number, amp: number, dist: number): string {
+		if (width === 0) return ''
+		const startX = 2
+		const endX = width - 2
+		const startY = amp * Math.sin(startX * freq) + dist
+
+		let pathData = `M${startX},${startY} `
+
+		for (let x = startX; x <= endX; x++) {
+			const y = amp * Math.sin(x * freq) + dist
+			pathData += `L${x},${y} `
+		}
+		return pathData
+	}
+
+	$: {
+		text // add this as a dependency
+		updateTextWidth()
+	}
+</script>
+
+<div class="squiggly-container" style="padding-bottom: {squigglyHeight}px;">
+	<h2 bind:this={textElement} class="squiggly-header" style="color: {color}">{text}</h2>
+	<svg
+		class="squiggly-underline"
+		width={textWidth}
+		height={squigglyHeight}
+		viewBox="0 0 {textWidth} {squigglyHeight}"
+	>
+		<path
+			d={path}
+			fill="none"
+			stroke={color}
+			stroke-width={lineWidth}
+			stroke-linecap="round"
+			stroke-linejoin="round"
+		/>
+	</svg>
+</div>
+
+<style lang="scss">
+	.squiggly-header {
+		font-size: $font-size;
+		font-weight: 400;
+		margin-bottom: $unit-fourth;
+	}
+
+	.squiggly-container {
+		position: relative;
+		display: inline-block;
+	}
+
+	.squiggly-underline {
+		position: absolute;
+		left: 0;
+		bottom: 0;
+	}
+</style>