From a871bcb9fe0467180a52193de1656a89dcd006e7 Mon Sep 17 00:00:00 2001
From: hjhan <hongjun.han@yieldchain.com>
Date: Fri, 31 Jul 2026 09:10:05 +0800
Subject: [PATCH] =?UTF-8?q?fix(login):=20=E7=99=BB=E5=BD=95=E9=A1=B5=20Nee?=
 =?UTF-8?q?dCaptcha=3Dfalse=20=E6=97=B6=20CaptchaClick=20=E9=81=BF?=
 =?UTF-8?q?=E5=85=8D=20null.setAttribute=20=E6=8A=A5=E9=94=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

页面加载时无条件调用 CaptchaClick()，但 <img id="captcha"> 仅在
NeedCaptcha=true 时渲染，导致无需验证码时 getElementById 返回 null，
null.setAttribute 抛错。增加 if (!img) return 守卫，img 存在时行为不变。
---
 YLErpWeb/Views/Account/Login.cshtml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/YLErpWeb/Views/Account/Login.cshtml b/YLErpWeb/Views/Account/Login.cshtml
index c3e8ae00..f71d0ea7 100644
--- a/YLErpWeb/Views/Account/Login.cshtml
+++ b/YLErpWeb/Views/Account/Login.cshtml
@@ -34,6 +34,7 @@
         })
         function CaptchaClick(){
             var img = document.getElementById('captcha');
+            if (!img) return;   // NeedCaptcha=false 时验证码 img 不渲染，避免 null.setAttribute 报错
             var newSrc = '@captchaUrl' + '&t=' + new Date().getTime();
             img.setAttribute('src', newSrc);
         }