From 06cf48c4c5165f2f008f4410445f8057261ba31f Mon Sep 17 00:00:00 2001
From: neverland <chenjiahan@youzan.com>
Date: Tue, 9 Jul 2019 16:41:20 +0800
Subject: [PATCH] [improvement] Uploader: utils ts (#3793)

---
 src/uploader/index.js               |  6 +-----
 src/uploader/{utils.js => utils.ts} | 12 ++++++++----
 2 files changed, 9 insertions(+), 9 deletions(-)
 rename src/uploader/{utils.js => utils.ts} (53%)

diff --git a/src/uploader/index.js b/src/uploader/index.js
index 1869acc41..fa7b4cb58 100644
--- a/src/uploader/index.js
+++ b/src/uploader/index.js
@@ -1,15 +1,11 @@
 import { createNamespace, addUnit } from '../utils';
-import { toArray, readFile, isOversize } from './utils';
+import { toArray, readFile, isOversize, isImageDataUrl } from './utils';
 import Icon from '../icon';
 import Image from '../image';
 import ImagePreview from '../image-preview';
 
 const [createComponent, bem] = createNamespace('uploader');
 
-function isImageDataUrl(dataUrl) {
-  return dataUrl.indexOf('data:image') === 0;
-}
-
 export default createComponent({
   inheritAttrs: false,
 
diff --git a/src/uploader/utils.js b/src/uploader/utils.ts
similarity index 53%
rename from src/uploader/utils.js
rename to src/uploader/utils.ts
index 532d54203..be085ebf4 100644
--- a/src/uploader/utils.js
+++ b/src/uploader/utils.ts
@@ -1,4 +1,4 @@
-export function toArray(item) {
+export function toArray<T>(item: T | T[]): T[] {
   if (Array.isArray(item)) {
     return item;
   }
@@ -6,12 +6,12 @@ export function toArray(item) {
   return [item];
 }
 
-export function readFile(file, resultType) {
+export function readFile(file: File, resultType: string) {
   return new Promise(resolve => {
     const reader = new FileReader();
 
     reader.onload = event => {
-      resolve(event.target.result);
+      resolve((event.target as FileReader).result);
     };
 
     if (resultType === 'dataUrl') {
@@ -22,6 +22,10 @@ export function readFile(file, resultType) {
   });
 }
 
-export function isOversize(files, maxSize) {
+export function isOversize(files: File | File[], maxSize: number): boolean {
   return toArray(files).some(file => file.size > maxSize);
 }
+
+export function isImageDataUrl(dataUrl: string): boolean {
+  return dataUrl.indexOf('data:image') === 0;
+}