Update zwitch

Author: wooorm

lib/index.js

@@ -40,7 +40,7 @@
  *
  * @typedef {'html'|'svg'} Space
  *
- * @typedef {(node: any, context: Context) => EstreeJsxChild?} Handle
+ * @typedef {(node: any, context: Context) => EstreeJsxChild|null|undefined|void} Handle
  *
  * @typedef Options
  * @property {Space} [space='html']
@@ -90,28 +90,22 @@ export function toEstree(tree, options = {}) {
     schema: options.space === 'svg' ? svg : html,
     comments: [],
     esm: [],
-    // @ts-expect-error: hush.
     handle: zwitch('type', {
       invalid,
-      // @ts-expect-error: hush.
       unknown,
-      // @ts-expect-error: hush.
-      handlers: Object.assign(
-        {},
-        {
-          comment,
-          doctype: ignore,
-          element,
-          mdxjsEsm,
-          mdxFlowExpression: mdxExpression,
-          mdxJsxFlowElement: mdxJsxElement,
-          mdxJsxTextElement: mdxJsxElement,
-          mdxTextExpression: mdxExpression,
-          root,
-          text
-        },
-        options.handlers
-      )
+      handlers: {
+        comment,
+        doctype,
+        element,
+        mdxjsEsm,
+        mdxFlowExpression: mdxExpression,
+        mdxJsxFlowElement: mdxJsxElement,
+        mdxJsxTextElement: mdxJsxElement,
+        mdxTextExpression: mdxExpression,
+        root,
+        text,
+        ...options.handlers
+      }
     })
   }
   let result = context.handle(tree, context)
@@ -147,13 +141,17 @@ function invalid(value) {
 }
 
 /**
- * @param {Node} node
+ * @param {unknown} node
  */
 function unknown(node) {
+  // @ts-expect-error: JS guarantees there’s a `type`.
   throw new Error('Cannot handle unknown node `' + node.type + '`')
 }
 
-function ignore() {}
+/**
+ * @param {import('hast').DocType} _node
+ */
+function doctype(_node) {}
 
 /**
  * @param {Comment} node