add js solution for coinChange

problems/0322.零钱兑换.md

@@ -304,6 +304,26 @@ func min(a, b int) int {
 
 ```
 
+Javascript：
+```javascript
+const coinChange = (coins, amount) => {
+    if(!amount) {
+        return 0;
+    }
+
+    let dp = Array(amount + 1).fill(Infinity);
+    dp[0] = 0;
+
+    for(let i =0; i < coins.length; i++) {
+        for(let j = coins[i]; j <= amount; j++) {
+            dp[j] = Math.min(dp[j - coins[i]] + 1, dp[j]);
+        }
+    }
+
+    return dp[amount] === Infinity ? -1 : dp[amount];
+}
+```
+
 
 
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