Feat: dark mode (#3652)

* feat(react/svelte): add dark mode defaults * refactor(darkmode): minimap, edges, edge labels * chore(style): edge label color * feat(colorMode): add colorMode prop light/dark/system * chore(examples): cleanup * test(colorMode): add tests * chore(base.css): add dark base * chore(examples): cleanup
2023-11-23 12:15:36 +01:00
parent 74c82272aa
commit ab5eef220f
38 changed files with 474 additions and 83 deletions
@@ -0,0 +1,35 @@
+import { useEffect, useState } from 'react';
+import type { ColorMode, ColorModeClass } from '@xyflow/system';
+
+function getMediaQuery() {
+  if (typeof window === 'undefined' || !window.matchMedia) {
+    return null;
+  }
+
+  return window.matchMedia('(prefers-color-scheme: dark)');
+}
+
+export default function useColorModeClass(colorMode: ColorMode): ColorModeClass {
+  const [colorModeClass, setColorModeClass] = useState<ColorModeClass | null>(
+    colorMode === 'system' ? null : colorMode
+  );
+
+  useEffect(() => {
+    if (colorMode !== 'system') {
+      setColorModeClass(colorMode);
+      return;
+    }
+
+    const mediaQuery = getMediaQuery();
+    const updateColorModeClass = () => setColorModeClass(mediaQuery?.matches ? 'dark' : 'light');
+
+    updateColorModeClass();
+    mediaQuery?.addEventListener('change', updateColorModeClass);
+
+    return () => {
+      mediaQuery?.removeEventListener('change', updateColorModeClass);
+    };
+  }, [colorMode]);
+
+  return colorModeClass !== null ? colorModeClass : getMediaQuery()?.matches ? 'dark' : 'light';
+}