'linear')
endEvent = $.fx.animationEnd
} else {
cssProperties = []
// CSS transitions
for (key in properties)
//如果设置 的CSS属性是变形之类的
if (supportedTransforms.test(key)) transforms += key + '(' + properties[key] + ') '
else cssValues[key] = properties[key], cssProperties.push(dasherize(key))
if (transforms) cssValues[transform] = transforms, cssProperties.push(transform)
if (duration > 0 && typeof properties === 'object') {
cssValues[transitionProperty] = cssProperties.join(', ')
cssValues[transitionDuration] = duration + 's'
cssValues[transitionTiming] = (ease
关键词：zepto是啥