關於 keydown 捕獲無法正常工作

Question

我想在startSkipMenu()啟動時捕獲 Enter 按鍵，但由於某種原因它不起作用

 let onSkipedMenuKeydown; function startSkipMenu() { document.addEventListener('keydown', onSkipedMenuKeydown); onSkipedMenuKeydown = function (event) { if (event.keyCode == 13) { console.log('Enter key pressed'); event.preventDefault(); } } } startSkipMenu();

我錯過了什么？

Answer 1

在添加事件監聽之前需要定義onSkipedMenuKeydown的內容。

 let onSkipedMenuKeydown; function startSkipMenu() { onSkipedMenuKeydown = function (event) { if (event.keyCode == 13) { console.log('Enter key pressed'); event.preventDefault(); } } document.addEventListener('keydown', onSkipedMenuKeydown); } startSkipMenu();