printer: Support \n\n while printing JSXElement children

benjamn · Apr 1, 2024 · 33c78da · 33c78da
1 parent 51d5c89
commit 33c78da
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diff --git a/lib/printer.ts b/lib/printer.ts
@@ -1315,6 +1315,8 @@ function genericPrintNoParens(path: any, options: any, print: any) {
           ) {
             if (/\S/.test(child.value)) {
               return child.value.replace(/^\s+|\s+$/g, "");
+            } else if (/\n\n/.test(child.value)) {
+              return "\n\n";
             } else if (/\n/.test(child.value)) {
               return "\n";
             }

diff --git a/test/printer.ts b/test/printer.ts
@@ -2600,4 +2600,33 @@ describe("printer", function () {
       ),
     );
   });
+
+  it("can print JSXElement syntax with newlines", function () {
+    const code = ["<div>", "  <span />", "", "  <span />", "</div>;"].join(eol);
+
+    const ast = b.program([
+      b.expressionStatement(
+        b.jsxElement(
+          b.jsxOpeningElement(b.jsxIdentifier("div")),
+          b.jsxClosingElement(b.jsxIdentifier("div")),
+          [
+            b.jsxText("\n  "),
+            b.jsxElement(
+              b.jsxOpeningElement(b.jsxIdentifier("span"), [], true),
+            ),
+            b.jsxText("\n\n  "),
+            b.jsxElement(
+              b.jsxOpeningElement(b.jsxIdentifier("span"), [], true),
+            ),
+            b.jsxText("\n"),
+          ],
+        ),
+      ),
+    ]);
+
+    const printer = new Printer({ tabWidth: 2 });
+
+    const pretty = printer.print(ast).code;
+    assert.strictEqual(pretty, code);
+  });
 });