完成截图工具例子

docs/thumbnail/js/common.js

@@ -60,7 +60,9 @@
     thumbnail.on('video', function(video) {
         console.log('Video size: ' + video.videoWidth + ' x ' + video.videoHeight);
         console.log('Video duration: ' + video.duration + 's');
-        thumbnail.setup(getConfig()).start();
+        thumbnail.setup(getConfig()).start().then(() => {
+            thumbnail.download();
+        });
     });
 
     thumbnail.on('canvas', function(canvas) {

docs/uncompiled/artplayer-tool-thumbnail.js

@@ -303,7 +303,7 @@
           };
         });
         this.processing = true;
-        runPromisesInSeries(promiseList).then(function () {
+        return runPromisesInSeries(promiseList).then(function () {
           return sleep(delay * 2).then(function () {
             _this4.processing = false;
 
@@ -380,6 +380,7 @@
         elink.click();
         document.body.removeChild(elink);
         this.emit('download', name);
+        return this;
       }
     }, {
       key: "errorHandle",