opt

src/App.tsx

@@ -97,9 +97,16 @@ const ImageWatermark = ({
     if (confirm("确定下载图片？")) {
       const canvas = canvasRef.current!;
       const a = document.createElement("a");
-      a.href = canvas.toDataURL("image/png");
-      a.download = file.name;
-      a.click();
+      canvas.toBlob((blob) => {
+        if (blob) {
+          a.href = URL.createObjectURL(blob);
+          a.download = file.name;
+          a.click();
+          setTimeout(() => {
+            URL.revokeObjectURL(a.href);
+          }, 1000 * 60);
+        }
+      });
     }
   };