[Refactor] use !! over Boolean()

Author: ljharb

lib/rules/no-direct-mutation-state.js

@@ -41,7 +41,7 @@ module.exports = {
      * @returns {Boolean} True if the component is valid, false if not.
      */
     function isValid(component) {
-      return Boolean(component && !component.mutateSetState);
+      return !!component && !component.mutateSetState;
     }
 
     /**

lib/rules/no-set-state.js

@@ -41,7 +41,7 @@ module.exports = {
      * @returns {Boolean} True if the component is valid, false if not.
      */
     function isValid(component) {
-      return Boolean(component && !component.useSetState);
+      return !!component && !component.useSetState;
     }
 
     /**

lib/rules/no-unused-prop-types.js

@@ -77,10 +77,7 @@ module.exports = {
      * @returns {Boolean} True if the component must be validated, false if not.
      */
     function mustBeValidated(component) {
-      return Boolean(
-        component
-        && !component.ignoreUnusedPropTypesValidation
-      );
+      return !!component && !component.ignoreUnusedPropTypesValidation;
     }
 
     /**

lib/rules/require-optimization.js

@@ -104,10 +104,7 @@ module.exports = {
      * @returns {Boolean} True if we are declaring a shouldComponentUpdate method, false if not.
      */
     function isSCUDeclared(node) {
-      return Boolean(
-        node
-        && node.name === 'shouldComponentUpdate'
-      );
+      return !!node && node.name === 'shouldComponentUpdate';
     }
 
     /**
@@ -126,8 +123,8 @@ module.exports = {
         }
       }
 
-      return Boolean(
-        node
+      return (
+        !!node
         && node.key.name === 'mixins'
         && hasPR
       );

lib/rules/sort-prop-types.js

@@ -48,8 +48,11 @@ function isRequiredProp(node) {
 }
 
 function isShapeProp(node) {
-  return Boolean(
-    node && node.callee && node.callee.property && node.callee.property.name === 'shape'
+  return !!(
+    node
+    && node.callee
+    && node.callee.property
+    && node.callee.property.name === 'shape'
   );
 }
 

lib/util/propTypes.js

@@ -172,7 +172,7 @@ module.exports = function propTypesInstructions(context, components, utils) {
     ObjectTypeAnnotation(annotation, parentName, seen) {
       let containsUnresolvedObjectTypeSpread = false;
       let containsSpread = false;
-      const containsIndexers = Boolean(annotation.indexers && annotation.indexers.length);
+      const containsIndexers = !!annotation.indexers && annotation.indexers.length > 0;
       const shapeTypeDefinition = {
         type: 'shape',
         children: {},

lib/util/propTypesSort.js

@@ -49,8 +49,11 @@ function isCallbackPropName(propName) {
  * @returns {Boolean} true if the prop is PropTypes.shape.
  */
 function isShapeProp(node) {
-  return Boolean(
-    node && node.callee && node.callee.property && node.callee.property.name === 'shape'
+  return !!(
+    node
+    && node.callee
+    && node.callee.property
+    && node.callee.property.name === 'shape'
   );
 }
 

tests/index.js

@@ -34,7 +34,7 @@ describe('all rule files should be exported by the plugin', () => {
 describe('deprecated rules', () => {
   it('marks all deprecated rules as deprecated', () => {
     ruleFiles.forEach((ruleName) => {
-      const inDeprecatedRules = Boolean(plugin.deprecatedRules[ruleName]);
+      const inDeprecatedRules = !!plugin.deprecatedRules[ruleName];
       const isDeprecated = plugin.rules[ruleName].meta.deprecated;
       if (inDeprecatedRules) {
         assert(isDeprecated, `${ruleName} metadata should mark it as deprecated`);
@@ -77,7 +77,7 @@ describe('configurations', () => {
     });
 
     ruleFiles.forEach((ruleName) => {
-      const inDeprecatedRules = Boolean(plugin.deprecatedRules[ruleName]);
+      const inDeprecatedRules = !!plugin.deprecatedRules[ruleName];
       const inConfig = typeof plugin.configs[configName].rules[`react/${ruleName}`] !== 'undefined';
       assert(inDeprecatedRules ^ inConfig); // eslint-disable-line no-bitwise
     });
@@ -91,7 +91,7 @@ describe('configurations', () => {
       assert.ok(ruleName.startsWith('react/'));
       assert.equal(plugin.configs[configName].rules[ruleName], 0);
 
-      const inDeprecatedRules = Boolean(plugin.deprecatedRules[ruleName]);
+      const inDeprecatedRules = !!plugin.deprecatedRules[ruleName];
       const inConfig = typeof plugin.configs[configName].rules[ruleName] !== 'undefined';
       assert(inDeprecatedRules ^ inConfig); // eslint-disable-line no-bitwise
     });