Update

problems/0496.下一个更大元素I.md

@@ -271,4 +271,27 @@ func nextGreaterElement(nums1 []int, nums2 []int) []int {
 }
 ```
 
+JavaScript:
+
+```JS 
+var nextGreaterElement = function (nums1, nums2) {
+  let stack = [];
+  let map = new Map();
+  for (let i = 0; i < nums2.length; i++) {
+    while (stack.length && nums2[i] > nums2[stack[stack.length - 1]]) {
+      let index = stack.pop();
+      map.set(nums2[index], nums2[i]);
+    }
+    stack.push(i);
+  }
+
+  let res = [];
+  for (let j = 0; j < nums1.length; j++) {
+    res[j] = map.get(nums1[j]) || -1;
+  }
+
+  return res;
+};
+```
+
 <div align="center"><img src=https://code-thinking.cdn.bcebos.com/pics/01二维码.jpg width=450> </img></div>