From 5d0ec0a5634cda17804098b1b3190c7a165ad4b8 Mon Sep 17 00:00:00 2001
From: Brian Donovan <1938+eventualbuddha@users.noreply.github.com>
Date: Sat, 1 Jun 2024 18:06:03 +0000
Subject: [PATCH] fix: prevent removal of trailing JSX whitespace

This just re-applies the fix from #1223 by @coderaiser on top of `master`.
---
 lib/printer.ts |  2 +-
 test/jsx.ts    | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/lib/printer.ts b/lib/printer.ts
index dee5dffa..e3f834f0 100644
--- a/lib/printer.ts
+++ b/lib/printer.ts
@@ -1314,7 +1314,7 @@ function genericPrintNoParens(path: any, options: any, print: any) {
             typeof child.value === "string"
           ) {
             if (/\S/.test(child.value)) {
-              return child.value.replace(/^\s+|\s+$/g, "");
+              return child.value.replace(/^\s+/g, "");
             } else if (/\n/.test(child.value)) {
               return "\n";
             }
diff --git a/test/jsx.ts b/test/jsx.ts
index d4d2e466..37f9d9ae 100644
--- a/test/jsx.ts
+++ b/test/jsx.ts
@@ -2,6 +2,7 @@
 
 import { parse } from "../lib/parser";
 import { Printer } from "../lib/printer";
+import assert from "assert";
 import * as types from "ast-types";
 const nodeMajorVersion = parseInt(process.versions.node, 10);
 
@@ -61,3 +62,34 @@ for (const { title, parser } of [
     });
   });
 }
+
+it("should not remove trailing whitespaces", function () {
+  const printer = new Printer({ tabWidth: 2 });
+  const source =
+    "function App() {\n" +
+    '  const name = "world";\n' +
+    "\n" +
+    "  return (\n" +
+    '    <div className="app">\n' +
+    "        hello {name}\n" +
+    "    </div>\n" +
+    "  );\n" +
+    "}";
+  const ast = parse(source);
+  ast.program.body[0].body.body[1].argument.openingElement.attributes[0].name.name =
+    "abc";
+
+  const code = printer.printGenerically(ast).code;
+
+  assert.equal(
+    code,
+    "function App() {\n" +
+      '  const name = "world";\n' +
+      "\n" +
+      "  return (\n" +
+      '    <div abc="app">hello {name}\n' +
+      "    </div>\n" +
+      "  );\n" +
+      "}",
+  );
+});