[Refactor] jsx-props-no-multi-spaces: extract type parameters to var

Author: HenryBrown0

CHANGELOG.md

@@ -18,6 +18,7 @@ This change log adheres to standards from [Keep a CHANGELOG](https://keepachange
 * [Refactor] `propTypes`: extract type params to var ([#3634][] @HenryBrown0)
 * [Refactor] [`boolean-prop-naming`]: invert if statement ([#3634][] @HenryBrown0)
 * [Refactor] [`function-component-definition`]: exit early if no type params ([#3634][] @HenryBrown0)
+* [Refactor] [`jsx-props-no-multi-spaces`]: extract type parameters to var ([#3634][] @HenryBrown0)
 
 [#3638]: https://github.com/jsx-eslint/eslint-plugin-react/pull/3638
 [#3634]: https://github.com/jsx-eslint/eslint-plugin-react/pull/3634

lib/rules/jsx-props-no-multi-spaces.js

@@ -98,8 +98,12 @@ module.exports = {
     }
 
     function containsGenericType(node) {
-      const containsTypeParams = typeof node.typeParameters !== 'undefined';
-      return containsTypeParams && node.typeParameters.type === 'TSTypeParameterInstantiation';
+      const nodeTypeParams = node.typeParameters;
+      if (typeof nodeTypeParams === 'undefined') {
+        return false;
+      }
+
+      return nodeTypeParams.type === 'TSTypeParameterInstantiation';
     }
 
     function getGenericNode(node) {