diff --git a/changelog_unreleased/javascript/18963.md b/changelog_unreleased/javascript/18963.md
new file mode 100644
index 000000000..e14f548e3
--- /dev/null
+++ b/changelog_unreleased/javascript/18963.md
@@ -0,0 +1,26 @@
+#### Fix duplicated comments in empty branches with `experimentalTernaries` (#18963 by @kovsu)
+
+<!-- prettier-ignore -->
+```jsx
+// Input
+condition ? ifTrue
+: [
+    // Hello, world!
+  ];
+
+// Prettier stable (--experimental-ternaries)
+condition ? ifTrue
+  // Hello, world!
+: (
+  [
+    // Hello, world!
+  ]
+);
+
+// Prettier main (--experimental-ternaries)
+condition ? ifTrue : (
+  [
+    // Hello, world!
+  ]
+);
+```
diff --git a/src/language-js/print/ternary.js b/src/language-js/print/ternary.js
index 98a5b46f4..bf10d0fae 100644
--- a/src/language-js/print/ternary.js
+++ b/src/language-js/print/ternary.js
@@ -281,29 +281,12 @@ function printTernary(path, options, print, args) {
       isSimpleExpressionByNodeCount(node.test, 1)) ||
     tryToParenthesizeAlternate;
 
-  const consequentComments = [];
-  if (
-    !isConsequentTernary &&
-    hasComment(consequentNode, CommentCheckFlags.Dangling)
-  ) {
-    path.call(() => {
-      consequentComments.push(printDanglingComments(path, options), hardline);
-    }, "consequent");
-  }
   const alternateComments = [];
   if (hasComment(node.test, CommentCheckFlags.Dangling)) {
     path.call(() => {
       alternateComments.push(printDanglingComments(path, options));
     }, "test");
   }
-  if (
-    !isAlternateTernary &&
-    hasComment(alternateNode, CommentCheckFlags.Dangling)
-  ) {
-    path.call(() => {
-      alternateComments.push(printDanglingComments(path, options));
-    }, "alternate");
-  }
   if (hasComment(node, CommentCheckFlags.Dangling)) {
     alternateComments.push(printDanglingComments(path, options));
   }
@@ -337,7 +320,6 @@ function printTernary(path, options, print, args) {
     (isInJsx && (isJsxElement(consequentNode) || isParentTernary || isInChain))
       ? hardline
       : line,
-    consequentComments,
     printedConsequent,
   ]);
 
diff --git a/tests/format/js/conditional/__snapshots__/format.test.js.snap b/tests/format/js/conditional/__snapshots__/format.test.js.snap
index a5b74afcb..606f4dfeb 100644
--- a/tests/format/js/conditional/__snapshots__/format.test.js.snap
+++ b/tests/format/js/conditional/__snapshots__/format.test.js.snap
@@ -516,6 +516,139 @@ c */
 ================================================================================
 `;
 
+exports[`issue-18944.js - {"experimentalTernaries":true} format 1`] = `
+====================================options=====================================
+experimentalTernaries: true
+parsers: ["babel", "flow", "typescript"]
+                                                      printWidth: 80 (default) |
+=====================================input======================================
+condition ? ifTrue
+: [
+      // Hello, world!
+  ];
+
+condition ? [
+      // Hello, world!
+  ]
+: ifFalse;
+
+condition ? ifTrue
+: {
+      // Hello, world!
+  };
+
+condition ? {
+    // Hello, world!
+  }
+: ifFalse;
+
+condition ? ifTrue
+: [
+      // Hello, world!
+    1,
+  ];
+
+=====================================output=====================================
+condition ? ifTrue : (
+  [
+    // Hello, world!
+  ]
+);
+
+condition ?
+  [
+    // Hello, world!
+  ]
+: ifFalse;
+
+condition ? ifTrue : (
+  {
+    // Hello, world!
+  }
+);
+
+condition ?
+  {
+    // Hello, world!
+  }
+: ifFalse;
+
+condition ? ifTrue : (
+  [
+    // Hello, world!
+    1,
+  ]
+);
+
+================================================================================
+`;
+
+exports[`issue-18944.js format 1`] = `
+====================================options=====================================
+parsers: ["babel", "flow", "typescript"]
+                                                      printWidth: 80 (default) |
+=====================================input======================================
+condition ? ifTrue
+: [
+      // Hello, world!
+  ];
+
+condition ? [
+      // Hello, world!
+  ]
+: ifFalse;
+
+condition ? ifTrue
+: {
+      // Hello, world!
+  };
+
+condition ? {
+    // Hello, world!
+  }
+: ifFalse;
+
+condition ? ifTrue
+: [
+      // Hello, world!
+    1,
+  ];
+
+=====================================output=====================================
+condition
+  ? ifTrue
+  : [
+      // Hello, world!
+    ];
+
+condition
+  ? [
+      // Hello, world!
+    ]
+  : ifFalse;
+
+condition
+  ? ifTrue
+  : {
+      // Hello, world!
+    };
+
+condition
+  ? {
+      // Hello, world!
+    }
+  : ifFalse;
+
+condition
+  ? ifTrue
+  : [
+      // Hello, world!
+      1,
+    ];
+
+================================================================================
+`;
+
 exports[`new-expression.js - {"experimentalTernaries":true} format 1`] = `
 ====================================options=====================================
 experimentalTernaries: true
diff --git a/tests/format/js/conditional/issue-18944.js b/tests/format/js/conditional/issue-18944.js
new file mode 100644
index 000000000..fd368e99e
--- /dev/null
+++ b/tests/format/js/conditional/issue-18944.js
@@ -0,0 +1,25 @@
+condition ? ifTrue
+: [
+      // Hello, world!
+  ];
+
+condition ? [
+      // Hello, world!
+  ]
+: ifFalse;
+
+condition ? ifTrue
+: {
+      // Hello, world!
+  };
+
+condition ? {
+    // Hello, world!
+  }
+: ifFalse;
+
+condition ? ifTrue
+: [
+      // Hello, world!
+    1,
+  ];