From f2c906687ec936ff1d401d7cd2b093a6dd76266d Mon Sep 17 00:00:00 2001
From: Dmitry Vasilev <dmitry.vasil@gmail.com>
Date: Wed, 7 Dec 2022 05:57:32 +0800
Subject: [PATCH] instanceof

---
 src/parse_js.js | 2 +-
 test/test.js    | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/parse_js.js b/src/parse_js.js
index 52aef70..b5ebe1f 100644
--- a/src/parse_js.js
+++ b/src/parse_js.js
@@ -1023,7 +1023,7 @@ const expr =
     binary(['**']),
     binary(['*','/','%']),
     binary(['+','-']),
-    binary(['<','>','<=','>=']),
+    binary(['<','>','<=','>=', 'instanceof']),
     binary(['===', '==', '!==', '!=']),
     binary(['&&']),
     binary(['||', '??']),
diff --git a/test/test.js b/test/test.js
index 34a2b86..84d0d3f 100644
--- a/test/test.js
+++ b/test/test.js
@@ -573,7 +573,7 @@ export const tests = [
     assert_code_evals_to('typeof 1', 'number')
   }),
 
-  test_only('eval_frame unary minus', () => {
+  test('eval_frame unary minus', () => {
     assert_code_evals_to(`-(1)`, -1)
     assert_code_evals_to(`-1`, -1)
     assert_code_evals_to(`-(-1)`, 1)
@@ -587,6 +587,11 @@ export const tests = [
     assert_equal(eval_frame(tree).children[0].result.value, 2)
   }),
 
+  test('eval_frame instanceof', () => {
+    assert_code_evals_to('1 instanceof Object', false)
+    assert_code_evals_to('{} instanceof Object', true)
+  }),
+
   test('eval_frame grouping', () => {
     const parsed = parse('(1+1)')
     const tree = eval_tree(parsed.node)