diff --git a/JS/DebounceImmediately.js b/JS/DebounceImmediately.js
new file mode 100644
index 0000000..45d7534
--- /dev/null
+++ b/JS/DebounceImmediately.js
@@ -0,0 +1,20 @@
+/**
+ * DebounceImmediately跟Debounce的区别是会首先立即执行一次。
+ */
+class DebounceImmediately {
+    constructor(time) {
+        //执行间隔
+        this.timeout = time;
+        //计时器
+        this.timer = null;
+    }
+    run(func, ...args) {
+        if (this.timer) {
+            return;
+        }
+        this.timer = setTimeout(() => {
+            this.timer = null;
+        }, this.timeout);
+        func(...args);
+    }
+}
\ No newline at end of file