[Refactor] boolean-prop-naming: invert if statement

Co-authored-by: HenryBrown0 <[email protected]>
Co-authored-by: Jordan Harband <[email protected]>

Author: HenryBrown0

CHANGELOG.md

@@ -16,6 +16,7 @@ This change log adheres to standards from [Keep a CHANGELOG](https://keepachange
 
 ### Changed
 * [Refactor] `propTypes`: extract type params to var ([#3634][] @HenryBrown0)
+* [Refactor] [`boolean-prop-naming`]: invert if statement ([#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/boolean-prop-naming.js

@@ -240,19 +240,24 @@ module.exports = {
       }
 
       if (
-        component.node.parent
-        && component.node.parent.type === 'VariableDeclarator'
-        && component.node.parent.id
-        && component.node.parent.id.type === 'Identifier'
-        && component.node.parent.id.typeAnnotation
-        && component.node.parent.id.typeAnnotation.typeAnnotation
-        && component.node.parent.id.typeAnnotation.typeAnnotation.typeParameters
-        && (
-          component.node.parent.id.typeAnnotation.typeAnnotation.typeParameters.type === 'TSTypeParameterInstantiation'
-          || component.node.parent.id.typeAnnotation.typeAnnotation.typeParameters.type === 'TypeParameterInstantiation'
+        !component.node.parent
+        || component.node.parent.type !== 'VariableDeclarator'
+        || !component.node.parent.id
+        || component.node.parent.id.type !== 'Identifier'
+        || !component.node.parent.id.typeAnnotation
+        || !component.node.parent.id.typeAnnotation.typeAnnotation
+      ) {
+        return;
+      }
+
+      const annotationTypeParams = component.node.parent.id.typeAnnotation.typeAnnotation.typeParameters;
+      if (
+        annotationTypeParams && (
+          annotationTypeParams.type === 'TSTypeParameterInstantiation'
+          || annotationTypeParams.type === 'TypeParameterInstantiation'
         )
       ) {
-        return component.node.parent.id.typeAnnotation.typeAnnotation.typeParameters.params.find(
+        return annotationTypeParams.params.find(
           (param) => param.type === 'TSTypeReference' || param.type === 'GenericTypeAnnotation'
         );
       }