add js solution for maxProfit with fee

problems/0714.买卖股票的最佳时机含手续费（动态规划）.md

@@ -153,7 +153,18 @@ class Solution:
 
 Go：
 
-
+Javascript：
+```javascript
+const maxProfit5 = (prices,fee) => {
+    let dp = Array.from(Array(prices.length), () => Array(2).fill(0));
+    dp[0][0] = 0 - prices[0];
+    for (let i = 1; i < prices.length; i++) {
+        dp[i][0] = Math.max(dp[i - 1][0], dp[i - 1][1] - prices[i]);
+        dp[i][1] = Math.max(dp[i - 1][0] + prices[i] - fee, dp[i - 1][1]);
+    }
+    return Math.max(dp[prices.length - 1][0], dp[prices.length - 1][1]);
+}
+```
 
 
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