Update README_EN.md

Author: yanglbme

solution/0800-0899/0885.Spiral Matrix III/README_EN.md

@@ -169,6 +169,46 @@ func spiralMatrixIII(rows int, cols int, rStart int, cStart int) [][]int {
 }
 ```
 
+#### JavaScript
+
+```js
+/**
+ * @param {number} rows
+ * @param {number} cols
+ * @param {number} rStart
+ * @param {number} cStart
+ * @return {number[][]}
+ */
+var spiralMatrixIII = function (rows, cols, rStart, cStart) {
+    const ans = [];
+    const totalCells = rows * cols;
+    const directions = [
+        [0, 1],
+        [1, 0],
+        [0, -1],
+        [-1, 0],
+    ];
+    let step = 0;
+    let d = 0;
+    let [r, c] = [rStart, cStart];
+    ans.push([r, c]);
+    while (ans.length < totalCells) {
+        if (d === 0 || d === 2) {
+            step++;
+        }
+        for (let i = 0; i < step; i++) {
+            r += directions[d][0];
+            c += directions[d][1];
+            if (r >= 0 && r < rows && c >= 0 && c < cols) {
+                ans.push([r, c]);
+            }
+        }
+        d = (d + 1) % 4;
+    }
+    return ans;
+};
+```
+
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 <!-- solution:end -->