diff --git "a/\347\211\207\346\256\265/javascript.json" "b/\347\211\207\346\256\265/javascript.json"
index 66ce9d7ba33f5329a7d9c4041d7768358008bfdf..5cbc2fdd7b09bce65408793b0ad00c50786681ab 100644
--- "a/\347\211\207\346\256\265/javascript.json"
+++ "b/\347\211\207\346\256\265/javascript.json"
@@ -1,14 +1,49 @@
 {
-  "出现次数": {
-    "prefix": [
-      "array",
-      "ChuXianCiShu",
-      "出现次数"
-    ],
-    "body": [
-      "const 统计出现次数 = (数组, 值) => 数组.reduce((次数, 项) => (项 === 值 ? 次数 + 1 : 次数), 0);",
-      "统计出现次数(${1:数组}, ${2:值});"
-    ],
-    "description": "统计数组中某个值出现的次数"
-  }
-}
\ No newline at end of file
+    "出现次数": {
+        "prefix": [
+            "array",
+            "ChuXianCiShu",
+            "出现次数"
+        ],
+        "body": [
+            "const 统计出现次数 = (数组, 值) => 数组.reduce((次数, 项) => (项 === 值 ? 次数 + 1 : 次数), 0);",
+            "统计出现次数(${1:数组}, ${2:值});"
+        ],
+        "description": "统计数组中某个值出现的次数"
+    },
+    "范围数组": {
+        "prefix": [
+            "范围数组",
+            "fanweishuzu"
+        ],
+        "body": [
+            "[...Array(${1:10}).keys()]"
+        ],
+        "description": "范围数组"
+    },
+    "输出": {
+        "prefix": [
+            "打印",
+            "输出",
+            "dayin",
+            "shuchu"
+        ],
+        "body": [
+            "console.log('${0:你好, 世界!}')"
+        ],
+        "description": "输出"
+    },
+    "多重笛卡尔积": {
+        "prefix": [
+            "多重笛卡尔积",
+            "duochongdikaerji"
+        ],
+        "body": [
+            "(a => a.reduce((as, bs) => as.map(a => bs.map(b => [...a, b])).flat(), [[]]))([",
+            "${0}[0, 1],",
+            "[2, 3],",
+            "])"
+        ],
+        "description": "多重笛卡尔积"
+    }
+}