diff --git a/javascript/2379-minimum-recolors-to-get-k-consecutive-black-blocks.js b/javascript/2379-minimum-recolors-to-get-k-consecutive-black-blocks.js
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+++ b/javascript/2379-minimum-recolors-to-get-k-consecutive-black-blocks.js
@@ -0,0 +1,31 @@
+/**
+ * Sliding Window
+ * Time O(n) | Space O(1)
+ * https://leetcode.com/problems/minimum-recolors-to-get-k-consecutive-black-blocks
+ * @param {string} blocks
+ * @param {number} k
+ * @return {number}
+ */
+var minimumRecolors = function(blocks, k) {
+    
+    let whiteCount = 0;
+    for (let i = 0; i < k; i++) {
+        if (blocks[i] === "W") whiteCount++;
+    }
+
+    let left = 0;
+    let right = k-1;
+
+    let min = Infinity;
+    while (right < blocks.length) {
+        min = Math.min(min, whiteCount);
+        
+        if (blocks[left] === "W") whiteCount--;
+        left++;
+        right++;
+        if (right < blocks.length && blocks[right] === "W") whiteCount++;
+    }
+
+    return min;
+};
+