Merge pull request #8588 from hulkish/faster-statement-type-check

perf: use faster statement type check
webpack · Jan 4, 2019 · 3e147e6 · 3e147e6
2 parents baf0aa1 + 2a04dee
commit 3e147e6
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/lib/dependencies/HarmonyDetectionParserPlugin.js b/lib/dependencies/HarmonyDetectionParserPlugin.js
@@ -13,9 +13,13 @@ module.exports = class HarmonyDetectionParserPlugin {
 			const isStrictHarmony = parser.state.module.type === "javascript/esm";
 			const isHarmony =
 				isStrictHarmony ||
-				ast.body.some(statement => {
-					return /^(Import|Export).*Declaration$/.test(statement.type);
-				});
+				ast.body.some(
+					statement =>
+						statement.type === "ImportDeclaration" ||
+						statement.type === "ExportDefaultDeclaration" ||
+						statement.type === "ExportNamedDeclaration" ||
+						statement.type === "ExportAllDeclaration"
+				);
 			if (isHarmony) {
 				const module = parser.state.module;
 				const compatDep = new HarmonyCompatibilityDependency(module);