js压缩图片到指定大小

//将图片压缩到100KB

imageConversion.compressAccurately(file,100);

//还可以加上其他选项，指定压缩图片的精确度、类型、宽度、高度、旋转方向、缩放

imageConversion.compressAccurately(file,{

  size: 100,    //The compressed image size is 100kb

  accuracy: 0.9,//the accuracy of image compression size,range 0.8-0.99,default 0.95;

                //this means if the picture size is set to 1000Kb and the

                //accuracy is 0.9, the image with the compression result

                //of 900Kb-1100Kb is considered acceptable;

  type: "image/png",

  width: 300,

  height: 200,

  orientation:2,

  scale: 0.5,

})