diff --git a/node_modules/element-ui/lib/element-ui.common.js b/node_modules/element-ui/lib/element-ui.common.js
index dae8b31..04522b0 1006/node_modules/element-ui/lib/element-ui.common.js b/node_modules/element-ui/lib/element-ui.common.js
index dae8b31..04522b0 100644
--- a/node_modules/element-ui/lib/element-ui.common.js
+++ b/node_modules/element-ui/lib/element-ui.common.js
@@ -29862,7 +29862,7 @@ function srcvue_type_script_lang_js_noop() {}
       var file = this.getFile(rawFile);
       this.onProgress(ev, file, this.uploadFiles);
       file.status = 'uploading';
-      file.percentage = ev.percent || 0;
+      file.percentage = (ev === undefined || ev.percent === undefined)?0:ev.percent;
     },
     handleSuccess: function handleSuccess(res, rawFile) {
       var file = this.getFile(rawFile);
diff --git a/node_modules/element-ui/packages/upload/src/index.vue b/node_modules/element-ui/packages/upload/src/index.vue
index e735653..e9873ae 100644
--- a/node_modules/element-ui/packages/upload/src/index.vue
+++ b/node_modules/element-ui/packages/upload/src/index.vue
@@ -176,7 +176,7 @@ export default {
       const file = this.getFile(rawFile);
       this.onProgress(ev, file, this.uploadFiles);
       file.status = 'uploading';
-      file.percentage = ev.percent || 0;
+      file.percentage = (ev === undefined |