Enhance Checkbox to use bind:group (#947)

* Enhance Checkbox to use bind:group

* Use custom logic

* Move multiple checkboxes above skeleton

* Incorprate PR feedback

* Any instead of string

docs/src/pages/components/Checkbox.svx

@@ -23,6 +23,12 @@
 
 <Checkbox labelText="Label text" disabled />
 
+### Multiple
+
+Bind a selection [group](https://svelte.dev/tutorial/group-inputs) to multiple checkboxes.
+
+<FileSource src="/framed/Checkbox/MultipleCheckboxes" />
+
 ### Skeleton
 
-<Checkbox skeleton />
+<Checkbox skeleton />

docs/src/pages/framed/Checkbox/MultipleCheckboxes.svelte

@@ -0,0 +1,15 @@
+<script>
+  import { Checkbox } from "carbon-components-svelte";
+
+  let options = ["Apple", "Banana", "Coconut"];
+  let selection = options.slice(0, 2);
+</script>
+
+{#each options as option}
+  <Checkbox bind:group="{selection}" labelText="{option}" value="{option}" />
+{/each}
+
+<div style="margin: var(--cds-layout-01) 0">
+  Selected options:
+  <strong>{selection.join(", ")}</strong>
+</div>