Line-D3.svelte component

<!--
  @component
  Generates an SVG line shape using the `line` function from [d3-shape](https://github.com/d3/d3-shape).
 -->
<script>
  import { getContext } from 'svelte';
  import { line, curveLinear } from 'd3-shape';

  const { data, xGet, yGet } = getContext('LayerCake');

  /** @typedef {import('d3-shape').CurveFactory} CurveFactory */
  /**
   * @typedef {Object} Props
   * @property {string} [stroke='#ab00d6'] - The shape's fill color. This is technically optional because it comes with a default value but you'll likely want to replace it with your own color.
   * @property {CurveFactory} [curve=curveLinear] - An optional D3 interpolation function. See [d3-shape](https://github.com/d3/d3-shape#curves) for options. Pass this function in uncalled, i.e. without the open-close parentheses.
   */

  /** @type {Props} */
  let { stroke = '#ab00d6', curve = curveLinear } = $props();

  let path = $derived(line().x($xGet).y($yGet).curve(curve));
  // .defined($y)
</script>

<path class="path-line" d={path($data)} {stroke}></path>

<style>
  .path-line {
    fill: none;
    stroke-linejoin: round;
    stroke-linecap: round;
    stroke-width: 2;
  }
</style>