feat: API test

ceilf6 · ceilf6 · commit 91e09f709482 · 2026-03-19T19:23:12.000+08:00
diff --git a/JS/API/in&includes.js b/JS/API/in&includes.js
@@ -0,0 +1,4 @@
+console.log(6 in [6]) // false
+console.log(0 in [6]) // true
+
+console.log([6].includes(6)) // true
