Add demo to README; fixes

Author: Rafferty97

README.md

@@ -12,6 +12,8 @@
 
 Spreadsheet-like table UI for SolidJS.
 
+__Demo:__ https://alexanderrafferty.com/projects/solid-tabular/
+
 ⚠️ This library is currently in early development, and breaking changes will definitely occur.
 
 ## Features

TODO

@@ -1,5 +1,4 @@
 - Extract out context menu
 - Extract out cell content
 - Lift cell component to top level?
-- Column auto-sizing
-- Fix reactivity in Basic Usage story
+- Column auto-sizing

src/stories/Table.stories.tsx

@@ -1,4 +1,4 @@
-import { createSignal, onMount } from 'solid-js'
+import { createMemo, createSignal, onMount } from 'solid-js'
 import type { Meta, StoryObj } from 'storybook-solidjs-vite'
 import { fn } from 'storybook/test'
 import { ActiveRange, Table } from 'src'
@@ -13,7 +13,7 @@ const meta = {
     const [activeRange, setActiveRange] = createSignal<ActiveRange>()
     const [widths, setWidths] = createSignal(new Map<string, number>())
 
-    const [data, setData] = createSignal<Record<string, unknown>[]>(props.data ?? [])
+    const [fetchedData, setFetchedData] = createSignal<Record<string, unknown>[]>()
 
     onMount(() => {
       if (!props.url) return
@@ -24,10 +24,12 @@ const meta = {
             header: true,
             skipEmptyLines: true,
           })
-          setData(parsed.data)
+          setFetchedData(parsed.data)
         })
     })
 
+    const data = createMemo(() => fetchedData() ?? props.data ?? [])
+
     return (
       <div
         style={{