[Refactor] jsx-key: use more AST selectors

Author: ljharb

CHANGELOG.md

@@ -40,6 +40,7 @@ This change log adheres to standards from [Keep a CHANGELOG](https://keepachange
 * [Refactor] [`jsx-sort-default-props`]: remove unnecessary code ([#1817][] @ljharb)
 * [Docs] [`jsx-no-target-blank`]: fix syntax highlighting ([#3199][] @shamrin)
 * [Docs] [`jsx-key`]: improve example ([#3202][] @chnakamura)
+* [Refactor] [`jsx-key`]: use more AST selectors (@ljharb)
 
 [#3207]: https://github.com/yannickcr/eslint-plugin-react/issues/3207
 [#3202]: https://github.com/yannickcr/eslint-plugin-react/pull/3202

lib/rules/jsx-key.js

@@ -163,19 +163,19 @@ module.exports = {
       },
 
       // Array.prototype.map
-      'CallExpression, OptionalCallExpression'(node) {
-        if (node.callee && node.callee.type !== 'MemberExpression' && node.callee.type !== 'OptionalMemberExpression') {
-          return;
-        }
-
-        if (node.callee && node.callee.property && node.callee.property.name !== 'map') {
-          return;
-        }
-
+      // eslint-disable-next-line no-multi-str
+      'CallExpression[callee.type="MemberExpression"][callee.property.name="map"],\
+       CallExpression[callee.type="OptionalMemberExpression"][callee.property.name="map"],\
+       OptionalCallExpression[callee.type="MemberExpression"][callee.property.name="map"],\
+       OptionalCallExpression[callee.type="OptionalMemberExpression"][callee.property.name="map"]'(node) {
         const fn = node.arguments[0];
         const isFn = fn && fn.type === 'FunctionExpression';
         const isArrFn = fn && fn.type === 'ArrowFunctionExpression';
 
+        if (!fn && !isFn && !isArrFn) {
+          return;
+        }
+
         if (isArrFn && (fn.body.type === 'JSXElement' || fn.body.type === 'JSXFragment')) {
           checkIteratorElement(fn.body);
         }