有一些特殊事件可用作方法的元素。您可以直接调用它们，如下所示：
// For text box and textarea
ele.focus()
ele.blur()
// For form element
formEle.reset()
formEle.submit()
// For any element
ele.click()###触发原生事件
const trigger = function (ele, eventName) {
const e = document.createEvent('HTMLEvents')
e.initEvent(eventName, true, false)
ele.dispatchEvent(e)
}
// 使用
trigger(ele, 'mousedown')###触发自定义事件
const trigger = function (ele, eventName, detail) {
const e = new CustomEvent(eventName, { detail })
// 触发该事件
ele.dispatchEvent(e)
}
// 分发事件
trigger(ele, 'my-event', { key1: 'value1', key2: 'value2' })
// 监听事件
ele.addEventListener('my-event', function (e) {
console.log(e.detail) // { key1: 'value1', key2: 'value2' }
})// Check an element against a selector
const matches = function (ele, selector) {
const p = Element.prototype
const f =
p.matches ||
p.webkitMatchesSelector ||
p.mozMatchesSelector ||
p.msMatchesSelector ||
function (s) {
return [].indexOf.call(document.querySelectorAll(s), this) !== -1
}
return f.call(ele, selector)
}