feat: Trigger beforeInputUpdate when handleButtonClicked is called

src/lib/components/Keyboard.ts

@@ -465,6 +465,13 @@ class SimpleKeyboard {
      */
     if (!this.input[inputName]) this.input[inputName] = "";
 
+    /**
+     * Perform an action before any input change
+     */
+    if (typeof this.options.beforeInputUpdate === "function") {
+      this.options.beforeInputUpdate(this);
+    }
+
     /**
      * Calculating new input
      */

src/lib/components/tests/Keyboard.test.js

@@ -218,6 +218,19 @@ it('Keyboard onChange will work', () => {
   expect(output).toBe("q");
 });
 
+it('Keyboard beforeInputChange will work', () => {
+  const mockBeforeInputUpdate = jest.fn();
+  
+  const keyboard = new Keyboard({
+    beforeInputUpdate: mockBeforeInputUpdate,
+    useMouseEvents: true
+  });
+
+  keyboard.getButtonElement("q").onclick();
+
+  expect(mockBeforeInputUpdate).toHaveBeenCalledWith(keyboard);
+});
+
 it('Keyboard onChangeAll will work', () => {
     let output;