另一个使用jquery的方法

    <script type="text/javascript">

    //set this variable according to the need within the page
    var BACKSPACE_NAV_DISABLED = true;

    function fnPreventBackspace(event){if (BACKSPACE_NAV_DISABLED && event.keyCode == 8) {return false;}}
    function fnPreventBackspacePropagation(event){if(BACKSPACE_NAV_DISABLED && event.keyCode == 8){event.stopPropagation();}return true;}

    $(document).ready(function(){ 
        if(BACKSPACE_NAV_DISABLED){
            //for IE use keydown, for Mozilla keypress  
            //as described in scr: http://www.codeproject.com/KB/scripting/PreventDropdownBackSpace.aspx
            $(document).keypress(fnPreventBackspace);
            $(document).keydown(fnPreventBackspace);

            //Allow Backspace is the following controls 
            var jCtrl = null;
            jCtrl = $('input[type="text"]');
            jCtrl.keypress(fnPreventBackspacePropagation);
            jCtrl.keydown(fnPreventBackspacePropagation);

            jCtrl = $('input[type="password"]');
            jCtrl.keypress(fnPreventBackspacePropagation);
            jCtrl.keydown(fnPreventBackspacePropagation);

            jCtrl = $('textarea');
            jCtrl.keypress(fnPreventBackspacePropagation);
            jCtrl.keydown(fnPreventBackspacePropagation);

            //disable backspace for readonly and disabled
            jCtrl = $('input[type="text"][readonly="readonly"]')
            jCtrl.keypress(fnPreventBackspace);
            jCtrl.keydown(fnPreventBackspace);

            jCtrl = $('input[type="text"][disabled="disabled"]')
            jCtrl.keypress(fnPreventBackspace);
            jCtrl.keydown(fnPreventBackspace);
        }
    }); 

    </script>

根据评论，如果人们按退格键删除，但字段没有集中，您似乎希望阻止他们丢失表单中的信息。

在这种情况下，您需要查看onunload事件处理程序。Stack Overflow使用它-如果你试图离开页面时，你已经开始写一个答案，它会弹出一个警告。

到目前为止给出的所有答案都集中在将修复脚本编写到web页面上，但是如果我只是想为自己使用该功能，而不影响其他用户呢?

In this case a solution for the browser itself is to be preferred: - Firefox on Linux "unmapped" the backspace behavior since 2006 so it's not affected; (at any rate, it was simply set to scroll up before then) - Chrome has just announced that it will do the same from now on; (http://forums.theregister.co.uk/forum/1/2016/05/20/chrome_deletes_backspace/) - Firefox on Windows can be set to ignore backspace by going into about:config and changing the backspace_action setting to 2; (http://kb.mozillazine.org/Browser.backspace_action) - Safari ?!

修正的erikkallen回答:

$(document).unbind('keydown').bind('keydown', function (event) {

    var doPrevent = false, elem;

    if (event.keyCode === 8) {
        elem = event.srcElement || event.target;
        if( $(elem).is(':input') ) {
            doPrevent = elem.readOnly || elem.disabled;
        } else {
            doPrevent = true;
        }
    }

    if (doPrevent) {
        event.preventDefault();
        return false;
    }
});

停止导航此代码工作!

$(document).on("keydown", function (event) {        
   if (event.keyCode === 8) {
      event.preventDefault();
    }
  });

但不是限制文本框，而是其他的

$(document).on("keydown", function (event) {
  if (event.which === 8 && !$(event.target).is("input, textarea")) {
   event.preventDefault();
  }
});

为了防止它在特定领域简单使用

$('#myOtherField').on("keydown", function (event) {
  if (event.keyCode === 8 || event.which === 8) { 
   event.preventDefault(); 
  } 
});

参考下面这个!

用jQuery阻止BACKSPACE导航返回(像谷歌的主页)

我已经在我的代码中使用它一段时间了。我为学生写在线测试，遇到了一个问题，当学生在测试过程中按退格键时，它会把他们带回到登录屏幕。令人沮丧的!它肯定适用于FF。

document.onkeypress = Backspace;
function Backspace(event) {
    if (event.keyCode == 8) {
        if (document.activeElement.tagName == "INPUT") {
            return true;
        } else {
            return false;
        }
    }
}