Added backgrund built-in component

README.md

@@ -33,3 +33,8 @@ pnpm install
 ```
 pnpm update
 ```
+
+# To Use Background
+
+Place your background image in `assets/images/background.avif` or `assets/images/background.webp`.
+Then, enable by adding <Background image /> or <Background color="#123456">

src/builtin-components/Background/Background.sass

@@ -0,0 +1 @@
+@use '/src/styles/classes.sass'

src/builtin-components/Background/Background.tsx

@@ -0,0 +1,27 @@
+import './Background.sass'
+import { Show } from 'solid-js'
+import backgroundAvif from '../../assets/images/background.avif'
+import backgroundWebp from '../../assets/images/background.webp'
+
+interface Props {
+  image?: boolean
+  color?: string
+}
+
+export default (props: Props) => {
+  return (
+    <>
+      <Show when={props.image}>
+        <picture class="fullscreen">
+          <source srcset={backgroundAvif.src} type="image/avif" />
+          <source srcset={backgroundWebp.src} type="image/webp" />
+          <img src={backgroundWebp.src} width="1920" height="auto" decoding="async" loading="lazy" alt="An image background" />
+        </picture>
+      </Show>
+
+      <Show when={!props.image}>
+        <div style={{ background: props.color }} class="fullscreen" />
+      </Show>
+    </>
+  )
+}