'', fn, function(event, fn) {
findHandlers(element, event, fn, selector).forEach(function(handler) {
delete handlers[id][handler.i]
element.removeEventListener(realEvent(handler.e), handler.proxy, eventCapture(handler, capture))
})
})
}
$.event = {
add: add,
remove: remove
}
//设置代理
$.proxy = function(fn, context) {
if ($.isFunction(fn)) {
//如果fn是函数，则申明一个新的函数并用context作为上下文调用fn
var proxyFn = function() {
return fn.apply(context, arguments)
}
//引用fn标示符
proxyFn._zid = zid(fn)
return proxyFn
} else if (typeof context == 'string') {
return $.proxy(fn[context], fn)
} else {
throw new TypeError("expected function")
}
}
$.fn.bind = function(event, callback) {
return this.each(function() {
add(this, event, callback)
})
}
$.fn.unbind = function(event, callback) {
return this.each(function() {
remove(this, event, callback)
})
}
//绑定一次性事件监听函数
$.fn.one = function(event, callback) {
return this.each(function(i, element) {
//添加函数，然后在回调函数里再删除绑定。达到一次性事件的目的
add(this, event, callback, null, function(fn, type) {
return function() {
var result = fn.apply(element, arguments) //这里执行绑定的回调
remove(element, type, fn) //删除上面的绑定
return result
}
})
})
}
var returnTrue = function() {
return true
},
returnFalse = function() {
return false
},
ignoreProperties = /^([A-Z]
关键词：zepto是啥