diff --git a/src/leecode/javascript/.lcpr_data/bricks.json b/src/leecode/javascript/.lcpr_data/bricks.json
deleted file mode 100644
index bd57d1f..0000000
--- a/src/leecode/javascript/.lcpr_data/bricks.json
+++ /dev/null
@@ -1,20 +0,0 @@
-{
-    "version": 1,
-    "all_bricks": {
-        "3462": {
-            "submit_time": [
-                1757658872,
-                1757659343
-            ],
-            "type": 4,
-            "review_day": [
-                1757692800,
-                1757952000,
-                1758211200,
-                1758816000,
-                1760025600,
-                1762790400
-            ]
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/leecode/javascript/7.整数反转.js b/src/leecode/javascript/7.整数反转.js
new file mode 100644
index 0000000..a7a849a
--- /dev/null
+++ b/src/leecode/javascript/7.整数反转.js
@@ -0,0 +1,45 @@
+/*
+ * @lc app=leetcode.cn id=7 lang=javascript
+ * @lcpr version=
+ *
+ * [7] 整数反转
+ */
+
+// @lc code=start
+/**
+ * @param {number} x
+ * @return {number}
+ */
+var reverse = function (x) {
+  const MAX_INT_32 = Math.pow(2, 31) - 1;
+  const MIN_INT_32 = -Math.pow(2, 31);
+  let ret = 0;
+  while (x != 0) {
+    ret = ret * 10 + (x % 10);
+    if (ret > MAX_INT_32 || ret < MIN_INT_32) {
+      return 0;
+    }
+    x = Math.trunc(x / 10);
+  }
+  return ret;
+};
+// @lc code=end
+
+/*
+// @lcpr case=start
+// 123\n
+// @lcpr case=end
+
+// @lcpr case=start
+// -123\n
+// @lcpr case=end
+
+// @lcpr case=start
+// 120\n
+// @lcpr case=end
+
+// @lcpr case=start
+// 0\n
+// @lcpr case=end
+
+ */