/**

*浏览器兼容写法封装

*/

let elementStyle = document.createElement('div').style

let vendor = (() => {

  let transformNames = {

    webkit: 'webkitTransform',

    Moz: 'MozTransform',

    O: 'OTransform',

    ms: 'msTransform',

    standard: 'transform'

  }

  for (let key in transformNames) {

    if (elementStyle[transformNames[key]] !== undefined) {

      return key

    }

  }

  return false

})()

export function prefixStyle(style) {

  if (vendor === false) {

    return false

  }

  if (vendor === 'standard') {

    return style

  }

  return vendor + style.charAt(0).toUpperCase() + style.substr(1)

}