Refactor code-style

Author: wooorm

lib/index.js

@@ -52,33 +52,34 @@ import {VFileMessage} from 'vfile-message'
 /**
  * @param {Value} value
  *   Serialized JavaScript to parse.
- * @param {Options} [options={}]
+ * @param {Options | null | undefined} [options={}]
  *   Configuration (optional).
  * @returns {Program}
  *   Program node (as esast).
  */
-export function fromJs(value, options = {}) {
+export function fromJs(value, options) {
+  const options_ = options || {}
   /** @type {ParserClass} */
   let parser = Parser
   /** @type {Array<Comment>} */
   const comments = []
   /** @type {Program} */
   let tree
 
-  if (options.plugins) {
-    parser = parser.extend(...options.plugins)
+  if (options_.plugins) {
+    parser = parser.extend(...options_.plugins)
   }
 
   try {
     // @ts-expect-error: Acorn looks enough like estree.
     tree = parser.parse(value, {
-      ecmaVersion: options.version || 'latest',
-      sourceType: options.module ? 'module' : 'script',
-      allowReturnOutsideFunction: options.allowReturnOutsideFunction,
-      allowImportExportEverywhere: options.allowImportExportEverywhere,
-      allowAwaitOutsideFunction: options.allowAwaitOutsideFunction,
-      allowHashBang: options.allowHashBang,
-      allowSuperOutsideMethod: options.allowSuperOutsideMethod,
+      ecmaVersion: options_.version || 'latest',
+      sourceType: options_.module ? 'module' : 'script',
+      allowReturnOutsideFunction: options_.allowReturnOutsideFunction,
+      allowImportExportEverywhere: options_.allowImportExportEverywhere,
+      allowAwaitOutsideFunction: options_.allowAwaitOutsideFunction,
+      allowHashBang: options_.allowHashBang,
+      allowSuperOutsideMethod: options_.allowSuperOutsideMethod,
       locations: true,
       onComment: comments
     })