flex box のベンダープリフィックス

http://blues25.com/wp/2016/01/31/flexbox_browser/

デフォルト Safari用 IE10用 Android 標準ブラウザ用
display: flex display: -webkit-flex display: -ms-flexbox display: -webkit-box
flex-direction: row -webkit-flex-direction: row -ms-flex-direction: row -webkit-box-orient: horizontal-webkit-box-direction: normal
flex-direction: column -webkit-flex-direction: column -ms-flex-direction: column -webkit-box-orient: vertical-webkit-box-direction: normal
justify-content: center -webkit-justify-content: center -ms-flex-pack: center -webkit-box-pack: center
justify-content: flex-start -webkit-justify-content: flex-start -ms-flex-pack: start -webkit-box-pack: start
justify-content: space-around -webkit-justify-content: space-around -ms-flex-pack: justify -webkit-box-pack: justify
justify-content: space-between -webkit-justify-content: space-between -ms-flex-pack: justify -webkit-box-pack: justify
align-items: center -webkit-align-items: center -ms-flex-align: center -webkit-box-align: center