docs: add invariant and nullthrow

docs/src/components/export-meta-info.tsx

@@ -3,10 +3,16 @@ import { useLatestExportsSizes } from '../hooks/use-latest-exports-sizes';
 import { useMemo } from 'react';
 import { humanReadableSize } from '../libs/sizes';
 
-export default function ExportMetaInfo() {
+interface ExportMetaInfoProps {
+  slug?: string;
+}
+
+export default function ExportMetaInfo({ slug: _slug }: ExportMetaInfoProps) {
   const { data } = useLatestExportsSizes();
-  const _slug = useRouter().asPath.split(/[?#]/)[0];
-  const slug = _slug.startsWith('/') ? _slug.slice(1) : _slug;
+  const router = useRouter();
+
+  const _ = (_slug || router.asPath.split(/[?#]/)[0]);
+  const slug = _.startsWith('/') ? _.slice(1) : _;
 
   const [humanReadableRawSize, humanReadableGzipSize, humanReadableBrotliSize] = useMemo(() => {
     if (!data) return ['loading...', 'loading...'];

docs/src/pages/_meta.json

@@ -60,6 +60,7 @@
   "compose-context-provider": {},
   "context-state": {},
   "create-fixed-array": {},
+  "invariant-nullthrow": {},
   "noop": {},
   "no-ssr": {},
   "rem": {},

docs/src/pages/invariant-nullthrow.mdx

@@ -0,0 +1,62 @@
+---
+title: invariant & nullthrow
+---
+
+import ExportMetaInfo from '../components/export-meta-info';
+
+# invariant
+
+<ExportMetaInfo slug="invariant" />
+
+```ts
+import { invariant } from 'foxact/invariant';
+
+invariant(true);
+// => undefined
+invariant(false);
+// => undefined
+invariant(0);
+// => undefined
+invariant('');
+// => undefined
+invariant(null);
+// Error: Value is null or undefined
+invariant(undefined);
+// Error: Value is null or undefined
+invariant();
+// Error: Value is null or undefined
+
+
+let value: string | null;
+invariant(value);
+console.log(value);
+          // ^?: string
+```
+
+# nullthrow
+
+<ExportMetaInfo slug="nullthrow" />
+
+```ts
+import { nullthrow } from 'foxact/nullthrow';
+
+nullthrow(true);
+// => undefined
+nullthrow(false);
+// => undefined
+nullthrow(0);
+// => undefined
+nullthrow('');
+// => undefined
+nullthrow(null);
+// Error: Value is null or undefined
+nullthrow(undefined);
+// Error: Value is null or undefined
+nullthrow();
+// Error: Value is null or undefined
+
+let nullable: string | null;
+const value = nullthrow(nullable);
+console.log(value);
+          // ^: string
+```