Add debounce

debounce.js

@@ -0,0 +1,22 @@
+/**
+@license
+Copyright (c) 2022 trading_peter
+This program is available under Apache License Version 2.0
+*/
+
+export const debounce = (cb, delay, immediate) => {
+  let timeout;
+
+  return (...a) => {
+    const callNow = immediate && !timeout;
+	
+    clearTimeout(timeout);
+
+    timeout = setTimeout(() => {
+      timeout = null;
+      if (!immediate) cb.apply(this, a);
+    }, delay);
+	
+    if (callNow) cb.apply(this, a);
+  };
+};