From e7d71cce2bf9c85e7b533772c12928a13135eb0d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A5=9E=E6=A5=BD=E5=9D=82=E3=81=BF=E3=81=9A=E3=81=8D?=
 <45122329+cokemine@users.noreply.github.com>
Date: Fri, 7 Jan 2022 16:02:32 +0800
Subject: [PATCH] fix(components): width reset to empty string should be parsed
 to auto (#5186)

fix #4878
---
 packages/components/table/src/util.ts | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/packages/components/table/src/util.ts b/packages/components/table/src/util.ts
index 9eb002511b..66e94205c3 100644
--- a/packages/components/table/src/util.ts
+++ b/packages/components/table/src/util.ts
@@ -194,20 +194,22 @@ export function mergeOptions<T, K>(defaults: T, config: K): T & K {
   return options
 }
 
-export function parseWidth(width: number | string): number {
+export function parseWidth(width: number | string): number | string {
+  if (width === '') return width
   if (width !== undefined) {
     width = parseInt(width as string, 10)
-    if (isNaN(width)) {
-      width = null
+    if (Number.isNaN(width)) {
+      width = ''
     }
   }
-  return +width
+  return width
 }
 
-export function parseMinWidth(minWidth): number {
-  if (typeof minWidth !== 'undefined') {
+export function parseMinWidth(minWidth: number | string): number | string {
+  if (minWidth === '') return minWidth
+  if (minWidth !== undefined) {
     minWidth = parseWidth(minWidth)
-    if (isNaN(minWidth)) {
+    if (Number.isNaN(minWidth)) {
       minWidth = 80
     }
   }