JS模块29 DOM事件模拟

模拟按钮的单击事件

const btn = document.querySelector('.logo');
const event = new MouseEvent('click', {
  bubbles:true,
  cancelable:true,
  view:window
});

btn.dispatchEvent(event)

具体的参数参考这里。

同样的，模拟键盘事件应该使用KeyboardEvent构造函数

event = new KeyboardEvent(typeArg, KeyboardEventInit);

模拟键盘事件的例子

const event = new KeyboardEvent('keydown', {
  altKey: true,
  bubbles: true,
  cancelable: true,
  code: 'KeyK',
  composed: true,
  ctrlKey: true,
  key: 'k',
  metaKey: true,
  repeat: true,
  shiftKey: true,
  view: window
})

document.addEventListener('keydown', (e) =>{
    console.log(e.key)
})

document.dispatchEvent(event);
// k

参考

• MSDN - MouseEvent()
• MSDN - dispatchEvent
• MSDN - 键盘事件 KeyboardEvent()
• LoadingMore's Blog - 原生JS模拟点击事件和自定义事件
• QingRong - 创建、初始化事件