vue獲取圖片寬高

 uploadFile(event){

        let that = this;

        let file = event.target.files[0];

        let fileReader = new FileReader();

        fileReader.readAsDataURL(file); //根據圖片路徑讀取圖片

        fileReader.onload = function(e) {

          let base64 = this.result;

          let img = new Image();

          img.src = base64;

          img.onload = function() {

            that.imgInfo = {

              width: img.naturalWidth,

              height: img.naturalHeight

            };

            console.log("寬：" + img.naturalWidth + " 高：" + img.naturalHeight);

          }

        }

      },