技術標籤：vue+element疑難雜症element踩坑vue.jsjavascript

元件內外部按鈕新增點選事件@click="downloadFile"即可，下邊程式碼copy可！
不過最重要的是理解，csdn隨時線上，歡迎騷擾！！！

// 點選儲存下載圖片
      downloadFile() {
        let aLink = document.createElement('a');
        let blob = this.base64ToBlob();
        let evt = document.createEvent('HTMLEvents'
 
);
        evt.initEvent('click', true, true);
        aLink.download = "積分趨勢效果統計圖"; //下載圖片的名稱
        aLink.href = URL.createObjectURL(blob);
        aLink.click();
      },
      exportImg() { //echart返回一個 base64 的 URL
        let myChart = this.$echarts.init(
          document.getElementById
 
("echarts的Id")
        );
        return myChart.getDataURL({
          type: 'png',
          pixelRatio: 1,
          backgroundColor: '#fff'
        })
      },
      base64ToBlob() { //將base64轉換blob
        let img = this.exportImg();
        let parts = img.split(';base64,');
        let
 
 contentType = parts[0].split(':')[1];
        let raw = window.atob(parts[1]);
        let rawLength = raw.length;
        let uInt8Array = new Uint8Array(rawLength);
        for (let i = 0; i < rawLength; ++i) {
          uInt8Array[i] = raw.charCodeAt(i);
        }
        return new Blob([uInt8Array], {
          type: contentType
        });
      },

&最後不要忘了關注點贊噢