Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/micromark-core-commonmark/dev/lib/label-start-link.js

@@ -0,0 +1,62 @@
+/**
+ * @import {
+ *   Construct,
+ *   State,
+ *   TokenizeContext,
+ *   Tokenizer
+ * } from 'micromark-util-types'
+ */
+
+import {ok as assert} from 'devlop'
+import {codes, types} from 'micromark-util-symbol'
+import {labelEnd} from './label-end.js'
+
+/** @type {Construct} */
+export const labelStartLink = {
+  name: 'labelStartLink',
+  resolveAll: labelEnd.resolveAll,
+  tokenize: tokenizeLabelStartLink
+}
+
+/**
+ * @this {TokenizeContext}
+ *   Context.
+ * @type {Tokenizer}
+ */
+function tokenizeLabelStartLink(effects, ok, nok) {
+  const self = this
+
+  return start
+
+  /**
+   * Start of label (link) start.
+   *
+   * ```markdown
+   * > | a [b] c
+   *       ^
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    assert(code === codes.leftSquareBracket, 'expected `[`')
+    effects.enter(types.labelLink)
+    effects.enter(types.labelMarker)
+    effects.consume(code)
+    effects.exit(types.labelMarker)
+    effects.exit(types.labelLink)
+    return after
+  }
+
+  /** @type {State} */
+  function after(code) {
+    // To do: this isn’t needed in `micromark-extension-gfm-footnote`,
+    // remove.
+    // Hidden footnotes hook.
+    /* c8 ignore next 3 */
+    return code === codes.caret &&
+      '_hiddenFootnoteSupport' in self.parser.constructs
+      ? nok(code)
+      : ok(code)
+  }
+}