Allow preview of thread images

src/plugins/utils.js

@@ -889,6 +889,27 @@ class Util {
                 })
         });
     }
+
+    download(matrixClient, event) {
+        this
+        .getAttachment(matrixClient, event)
+        .then((url) => {
+          const link = document.createElement("a");
+          link.href = url;
+          link.target = "_blank";
+          link.download = event.getContent().body || this.$t("fallbacks.download_name");
+          document.body.appendChild(link);
+          link.click();
+
+          setTimeout(function () {
+            document.body.removeChild(link);
+            URL.revokeObjectURL(url);
+          }, 200);
+        })
+        .catch((err) => {
+          console.log("Failed to fetch attachment: ", err);
+        });
+    }
 }
 export default new Util();