diff --git a/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README.md b/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README.md
index 67b38127c0a8a..a077238b27a81 100644
--- a/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README.md	
+++ b/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README.md	
@@ -226,6 +226,43 @@ function smallestDistancePair(nums: number[], k: number): number {
 }
 ```
 
+#### JavaScript
+
+```js
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number}
+ */
+function smallestDistancePair(nums, k) {
+    nums.sort((a, b) => a - b);
+    const n = nums.length;
+    let left = 0,
+        right = nums[n - 1] - nums[0];
+
+    while (left < right) {
+        const mid = (left + right) >> 1;
+        let count = 0,
+            i = 0;
+
+        for (let j = 0; j < n; j++) {
+            while (nums[j] - nums[i] > mid) {
+                i++;
+            }
+            count += j - i;
+        }
+
+        if (count >= k) {
+            right = mid;
+        } else {
+            left = mid + 1;
+        }
+    }
+
+    return left;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README_EN.md b/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README_EN.md
index d09dbe355c366..b4bcb86be3b05 100644
--- a/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README_EN.md	
+++ b/solution/0700-0799/0719.Find K-th Smallest Pair Distance/README_EN.md	
@@ -220,6 +220,43 @@ function smallestDistancePair(nums: number[], k: number): number {
 }
 ```
 
+#### JavaScript
+
+```js
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number}
+ */
+function smallestDistancePair(nums, k) {
+    nums.sort((a, b) => a - b);
+    const n = nums.length;
+    let left = 0,
+        right = nums[n - 1] - nums[0];
+
+    while (left < right) {
+        const mid = (left + right) >> 1;
+        let count = 0,
+            i = 0;
+
+        for (let j = 0; j < n; j++) {
+            while (nums[j] - nums[i] > mid) {
+                i++;
+            }
+            count += j - i;
+        }
+
+        if (count >= k) {
+            right = mid;
+        } else {
+            left = mid + 1;
+        }
+    }
+
+    return left;
+}
+```
+
 <!-- tabs:end -->
 
 <!-- solution:end -->
diff --git a/solution/0700-0799/0719.Find K-th Smallest Pair Distance/Solution.js b/solution/0700-0799/0719.Find K-th Smallest Pair Distance/Solution.js
new file mode 100644
index 0000000000000..e9a48c161779c
--- /dev/null
+++ b/solution/0700-0799/0719.Find K-th Smallest Pair Distance/Solution.js	
@@ -0,0 +1,32 @@
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number}
+ */
+function smallestDistancePair(nums, k) {
+    nums.sort((a, b) => a - b);
+    const n = nums.length;
+    let left = 0,
+        right = nums[n - 1] - nums[0];
+
+    while (left < right) {
+        const mid = (left + right) >> 1;
+        let count = 0,
+            i = 0;
+
+        for (let j = 0; j < n; j++) {
+            while (nums[j] - nums[i] > mid) {
+                i++;
+            }
+            count += j - i;
+        }
+
+        if (count >= k) {
+            right = mid;
+        } else {
+            left = mid + 1;
+        }
+    }
+
+    return left;
+}