文件大小变量提取

src/views/proof/components/AddBanner.vue

@@ -44,6 +44,7 @@ import H5Cropper from 'vue-cropper-h5';
 import { Getter } from 'vuex-class';
 import { TemplateDataItem } from '@/const/interface';
 import { Route } from 'vue-router';
+const maxFileSize = 2* 1024 * 1024;
 @Component({
   components: {
     [Button.name]: Button,
@@ -86,7 +87,7 @@ export default class AddBanner extends Vue {
       this.$toast("最多上传4张banner图");
       return;
     }
-    if (e.target.files[0].size > 2* 1024 * 1024) {
+    if (e.target.files[0].size > maxFileSize) {
       this.$toast("文件大小限制2M");
       return;
     }