From cec63e2119671482a0de2d5f948d7e367791908f Mon Sep 17 00:00:00 2001
From: Boshen <boshenc@gmail.com>
Date: Sun, 5 Jan 2025 23:09:57 +0800
Subject: [PATCH] feat(minifier): `{}` evals to `f64::NaN`

---
 crates/oxc_ecmascript/src/constant_evaluation/mod.rs          | 1 +
 crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs | 1 +
 2 files changed, 2 insertions(+)

diff --git a/crates/oxc_ecmascript/src/constant_evaluation/mod.rs b/crates/oxc_ecmascript/src/constant_evaluation/mod.rs
index b9d04e3e5..a5da41357 100644
--- a/crates/oxc_ecmascript/src/constant_evaluation/mod.rs
+++ b/crates/oxc_ecmascript/src/constant_evaluation/mod.rs
@@ -153,6 +153,7 @@ pub trait ConstantEvaluation<'a> {
             Expression::SequenceExpression(s) => {
                 s.expressions.last().and_then(|e| self.eval_to_number(e))
             }
+            Expression::ObjectExpression(e) if e.properties.is_empty() => Some(f64::NAN),
             expr => {
                 use crate::ToNumber;
                 expr.to_number()
diff --git a/crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs b/crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs
index 165f9eaa6..29dc61ca5 100644
--- a/crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs
+++ b/crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs
@@ -1450,6 +1450,7 @@ mod test {
         test("~true", "-2");
         test("~'1'", "-2");
         test("~'-1'", "0");
+        test("~{}", "-1");
     }
 
     #[test]