Y)?)$/i,
transform,
transitionProperty, transitionDuration, transitionTiming,
animationName, animationDuration, animationTiming,
cssReset = {}
//将驼峰式的字符串转成用-分隔的小写形式，如borderWidth ==> border-width
function dasherize(str) {
return downcase(str.replace(/([a-z])([A-Z])/, '$1-$2'))
}
function downcase(str) {
return str.toLowerCase()
}
//用于修正事件名
function normalizeEvent(name) {
return eventPrefix ? eventPrefix + name : downcase(name)
}
//根据浏览器的特性设置CSS属性前轻辍和事件前辍，比如浏览器内核是webkit
//那么用于设置CSS属性的前辍prefix就等于'-webkit-',用来修正事件名的前辍eventPrefix就是Webkit
$.each(vendors, function(vendor, event) {
if (testEl.style[vendor + 'TransitionProperty'] !== undefined) {
prefix = '-' + downcase(vendor) + '-'
eventPrefix = event
return false
}
})
transform = prefix + 'transform'
cssReset[transitionProperty = prefix + 'transition-property'] = cssReset[transitionDuration = prefix + 'transition-duration'] = cssReset[transitionTiming = prefix + 'transition-timing-function'] = cssReset[animationName = prefix + 'animation-name'] = cssReset[animationDuration = prefix + 'animation-duration'] = cssReset[animationTiming = prefix + 'animation-timing-function'] = ''
$.fx = {
off: (eventPrefix === undefined && testEl.style.transitionProperty === undefined),
speeds: {
_default: 400,
fast: 200,
slow: 600
},
cssPrefix: prefix,
transitionEnd: normalizeEvent('TransitionEnd'),
animationEnd: normalizeEvent('AnimationEnd')
}
$.fn.animate = function(properties, duration, ease, callback) {
if ($.isPlainObject(duration)) ease = duration.easing, callback = duration.complete, duration = duration.duration
//如果duration是数字时，表示动画持续时间，如果是字符串，则从$.fx.speeds中取出相对应的值，如果没有找到相应的值，对取默认值
if (duration) duration = (typeof duration == 'number' ? duration : ($.fx.speeds[duration]
关键词：zepto是啥