Use Set instead of array

Author: alexzherdev

lib/rules/jsx-fragments.js

@@ -116,7 +116,7 @@ module.exports = {
     }
 
     const jsxElements = [];
-    const fragmentNames = [`${reactPragma}.${fragmentPragma}`];
+    const fragmentNames = new Set([`${reactPragma}.${fragmentPragma}`]);
 
     // --------------------------------------------------------------------------
     // Public
@@ -146,7 +146,7 @@ module.exports = {
           node.specifiers.forEach(spec => {
             if (spec.imported && spec.imported.name === fragmentPragma) {
               if (spec.local) {
-                fragmentNames.push(spec.local.name);
+                fragmentNames.add(spec.local.name);
               }
             }
           });
@@ -158,7 +158,7 @@ module.exports = {
           const openingEl = node.openingElement;
           const elName = elementType(openingEl);
 
-          if (fragmentNames.indexOf(elName) !== -1 || refersToReactFragment(elName)) {
+          if (fragmentNames.has(elName) || refersToReactFragment(elName)) {
             if (reportOnReactVersion(node)) {
               return;
             }