From 35260e024aded69c1df992af8be6f255f9278147 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=99=88=E5=98=89=E6=B6=B5?= <chenjiahan@youzan.com>
Date: Wed, 12 Feb 2020 10:22:37 +0800
Subject: [PATCH] chore: add isPromise utils

---
 src/uploader/index.js | 6 +++---
 src/utils/index.ts    | 4 ++++
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/uploader/index.js b/src/uploader/index.js
index 410a2c75e..eeaf7fce4 100644
--- a/src/uploader/index.js
+++ b/src/uploader/index.js
@@ -1,5 +1,5 @@
 // Utils
-import { createNamespace, addUnit, noop } from '../utils';
+import { createNamespace, addUnit, noop, isPromise } from '../utils';
 import { toArray, readFile, isOversize, isImageFile } from './utils';
 
 // Mixins
@@ -107,7 +107,7 @@ export default createComponent({
           return;
         }
 
-        if (response.then) {
+        if (isPromise(response)) {
           response
             .then(() => {
               this.readFile(files);
@@ -182,7 +182,7 @@ export default createComponent({
           return;
         }
 
-        if (response.then) {
+        if (isPromise(response)) {
           response
             .then(() => {
               this.deleteFile(file, index);
diff --git a/src/utils/index.ts b/src/utils/index.ts
index c78525d6a..0186eda41 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -19,6 +19,10 @@ export function isObject(val: any): val is Record<any, any> {
   return val !== null && typeof val === 'object';
 }
 
+export function isPromise<T = any>(val: unknown): val is Promise<T> {
+  return isObject(val) && isFunction(val.then) && isFunction(val.catch);
+}
+
 export function get(object: any, path: string): any {
   const keys = path.split('.');
   let result = object;