Javascript 如何基于内置事件创建新的事件字符串?
我试图创建一个名为Javascript 如何基于内置事件创建新的事件字符串?,javascript,class,events,callback,custom-events,Javascript,Class,Events,Callback,Custom Events,我试图创建一个名为clickButton的自定义事件,它基于bulit-in事件click,用于更具体地处理元素 根据,似乎使用.dispatchEvent()进行注册是不可避免的。因此,我使用另一个.addEventListener()来掩盖单击按钮事件行,如下所示: this.elem = document.querySelector(elem); this.elem.addEventListener(this.clickButton.type, (e) => { console.
clickButton
的自定义事件,它基于bulit-in事件click
,用于更具体地处理元素
根据,似乎使用.dispatchEvent()
进行注册是不可避免的。因此,我使用另一个.addEventListener()
来掩盖单击按钮
事件行,如下所示:
this.elem = document.querySelector(elem);
this.elem.addEventListener(this.clickButton.type, (e) => {
console.log(e);
}, false)
this.elem.addEventListener('click', (e) => e.target.dispatchEvent(this.clickButton));
但我认为这是多余的,因为我仍然可以通过元素的e.target.nodeName
为每个元素提供不同的回调:
function eventBus(string) {
const elem = document.querySelector(string);
elem.addEventListener('click', (e) => {
let isNodeName = (e.target.nodeName),
ternary = isNodeName === 'P' ? foo(e) : bar(e);
})
}
function foo(e) {
console.log(e, 'This is foo function');
}
function bar(e) {
console.log(e, 'This is bar function');
}
let div = eventBus('div')
let p = eventBus('p')
我的期望是独立于内置事件,但单击按钮仍然可以根据单击事件单独立即工作,如下所示:
this.elem = document.querySelector(elem);
this.elem.addEventListener(this.clickButton.type, (e) => {
console.log(e);
}, false)
this.elem.addEventListener('click', (e) => e.target.dispatchEvent(this.clickButton));
this.elem.addEventListener('clickButton',callback)
完整代码:
class EventBus {
constructor(elem) {
this.clickButton = new CustomEvent('clickButton');
}
}
class Menu extends EventBus {
constructor(elem, clickButton) {
super(clickButton)
this.elem = document.querySelector(elem);
this.elem.addEventListener(this.clickButton.type, (e) => {
console.log(e);
}, false)
this.elem.addEventListener('click', (e) => e.target.dispatchEvent(this.clickButton));
}
foo(e) {
console.log(e, 'This is foo function');
}
bar(e) {
console.log(e, 'This is bar function');
}
}
let classDiv = new Menu('div')
let classP = new Menu('p')
有什么解决办法吗