Always retain lines for async arrow (#11836)

babel · Jul 15, 2020 · e12caf4 · e12caf4
1 parent 7eaf37e
commit e12caf4
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Showing 4 changed files with 20 additions and 1 deletion.
diff --git a/packages/babel-generator/src/generators/methods.js b/packages/babel-generator/src/generators/methods.js
@@ -112,7 +112,7 @@ export function ArrowFunctionExpression(node: Object) {
     !hasTypes(node, firstParam)
   ) {
     if (
-      this.format.retainLines &&
+      (this.format.retainLines || node.async) &&
       node.loc &&
       node.body.loc &&
       node.loc.start.line < node.body.loc.start.line

diff --git a/packages/babel-generator/test/fixtures/parentheses/async-arrow-function/input.js b/packages/babel-generator/test/fixtures/parentheses/async-arrow-function/input.js
@@ -0,0 +1,10 @@
+const x = async (
+  // some comment
+  a
+) => {
+  return foo(await a);
+};
+
+function foo(a) {
+  return a;
+}
diff --git a/packages/babel-generator/test/fixtures/parentheses/async-arrow-function/options.json b/packages/babel-generator/test/fixtures/parentheses/async-arrow-function/options.json
@@ -0,0 +1 @@
+{}
diff --git a/packages/babel-generator/test/fixtures/parentheses/async-arrow-function/output.js b/packages/babel-generator/test/fixtures/parentheses/async-arrow-function/output.js
@@ -0,0 +1,8 @@
+const x = async ( // some comment
+  a) => {
+  return foo(await a);
+};
+
+function foo(a) {
+  return a;
+}