From 71871616217b1cdc7ed201d6bc4738ed288ee4dd Mon Sep 17 00:00:00 2001
From: RuoYi <yzz_ivy@163.com>
Date: Tue, 14 Sep 2021 17:07:38 +0800
Subject: [PATCH] =?UTF-8?q?=E7=A6=81=E6=AD=A2=E5=90=8E=E9=80=80=E9=94=AE?=
 =?UTF-8?q?=EF=BC=88Backspace=EF=BC=89?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/resources/static/ruoyi/js/common.js  | 32 +++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/ruoyi-admin/src/main/resources/static/ruoyi/js/common.js b/ruoyi-admin/src/main/resources/static/ruoyi/js/common.js
index 2c586ba5..4431bf0b 100644
--- a/ruoyi-admin/src/main/resources/static/ruoyi/js/common.js
+++ b/ruoyi-admin/src/main/resources/static/ruoyi/js/common.js
@@ -490,6 +490,38 @@ function loadJs(file, headElem) {
     else document.getElementsByTagName('head')[0].appendChild(script);
 }
 
+// 禁止后退键（Backspace）
+window.onload = function() {
+	document.getElementsByTagName("body")[0].onkeydown = function() {
+		// 获取事件对象  
+		var elem = event.relatedTarget || event.srcElement || event.target || event.currentTarget;
+		// 判断按键为backSpace键  
+		if (event.keyCode == 8) {
+			// 判断是否需要阻止按下键盘的事件默认传递  
+			var name = elem.nodeName;
+			if (name != 'INPUT' && name != 'TEXTAREA') {
+				return _stopIt(event);
+			}
+			var type_e = elem.type.toUpperCase();
+			if (name == 'INPUT' && (type_e != 'TEXT' && type_e != 'TEXTAREA' && type_e != 'PASSWORD' && type_e != 'FILE')) {
+				return _stopIt(event);
+			}
+			if (name == 'INPUT' && (elem.readOnly == true || elem.disabled == true)) {
+				return _stopIt(event);
+			}
+		}
+	};
+};
+function _stopIt(e) {
+	if (e.returnValue) {
+		e.returnValue = false;
+	}
+	if (e.preventDefault) {
+		e.preventDefault();
+	}
+	return false;
+}
+
 /** 设置全局ajax处理 */
 $.ajaxSetup({
     complete: function(XMLHttpRequest, textStatus) {