proportion.js:满足设备的最佳比例

比例.js 满足设备的最佳比例。 一、API // ** Params // @el : {Element} the element // @isLanscape : [OPTIONAL] {Boolean} by default is `false`(portrait) // @radio : [OPTIONAL] {Number} the proportion of theShortSide/theLongSide，by default is `0.61` // @maxWidth : [OPTIONAL] {Number} the max-width, by default is `640` // @maxHeight : [OPTIONAL] {Number} the max-height, by default is `1008` proportion ( el , is