关于 keydown 捕获无法正常工作

Question

我想在startSkipMenu()启动时捕获 Enter 按键，但由于某种原因它不起作用

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

我错过了什么？

Answer 1

在添加事件监听之前需要定义onSkipedMenuKeydown的内容。

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