Prevent comment after head of member chain move around (#20125)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

changelog_unreleased/javascript/20125.md

@@ -0,0 +1,15 @@
+#### Prevent comment after head of member chain move around (#20125 by @fisker)
+
+<!-- prettier-ignore -->
+```jsx
+// Input
+x // comment
+  .foo()
+
+// Prettier stable
+x.foo(); // comment
+
+// Prettier main
+x // comment
+  .foo();
+```

src/language-js/print/member-chain.js

@@ -293,11 +293,12 @@ function printMemberChain(path, options, print) {
     if (groups[0].length === 1) {
       const firstNode = groups[0][0].node;
       return (
-        firstNode.type === "ThisExpression" ||
-        (firstNode.type === "Identifier" &&
-          (isFactory(firstNode.name) ||
-            (isExpressionStatement && isShort(firstNode.name)) ||
-            hasComputed))
+        (firstNode.type === "ThisExpression" ||
+          (firstNode.type === "Identifier" &&
+            (isFactory(firstNode.name) ||
+              (isExpressionStatement && isShort(firstNode.name)) ||
+              hasComputed))) &&
+        !hasComment(firstNode, CommentCheckFlags.Trailing)
       );
     }
 

tests/format/js/method-chain/__snapshots__/format.test.js.snap

@@ -1281,6 +1281,33 @@ s.get(u)?.trigger({
 ================================================================================
 `;
 
+exports[`issue-18523.js format 1`] = `
+====================================options=====================================
+parsers: ["babel", "flow", "typescript"]
+                                                      printWidth: 80 (default) |
+=====================================input======================================
+a //
+  .bla()
+
+abc //
+  .bla()
+
+this //
+  .bla()
+
+=====================================output=====================================
+a //
+  .bla();
+
+abc //
+  .bla();
+
+this //
+  .bla();
+
+================================================================================
+`;
+
 exports[`logical.js format 1`] = `
 ====================================options=====================================
 parsers: ["babel", "flow", "typescript"]

tests/format/js/method-chain/issue-18523.js

@@ -0,0 +1,8 @@
+a //
+  .bla()
+
+abc //
+  .bla()
+
+this //
+  .bla()