js触发事件代码

// 获取元素
var button = document.getElementById('myButton');

// 创建一个新的Event对象
var event = new Event('click');

// 触发事件
button.dispatchEvent(event);

// 获取元素
var button = document.getElementById('myButton');

// 创建一个新的MouseEvent对象
var event = new MouseEvent('click', {
    'view': window,
    'bubbles': true,
    'cancelable': true
});

// 触发事件
button.dispatchEvent(event);

document.addEventListener('DOMContentLoaded', function() {
    var button = document.getElementById('myButton');
    button.addEventListener('click', function() {
        alert('Button clicked!');
    });

    var event = new Event('click');
    button.dispatchEvent(event);
});