Question

我使用“禁用”类激活主菜单上的链接。但是如何在媒体宽度768上删除“禁用”类？或者如何在小屏幕上禁用“禁用”类功能？（无需链接“主菜单1”@ 768）

if ($(window).width() > 768) {
            $('ul.nav li.dropdown').hover(function () {
                $(this).find('.dropdown-menu').stop(true, true).delay(600).fadeIn(200);
            }, function () {
                $(this).find('.dropdown-menu').stop(true, true).delay(200).fadeOut(600);
            });
        }

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" type="text/css">



  <div class="container">
<nav class="navbar navbar-default">
  <div class="container">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Bootstrap nav menu</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
       
        <li class="dropdown">
          <a href="https://www.google.com" class="dropdown-toggle disabled" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Main menu 1<span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">submenu1</a></li>
            <li><a href="#">submenu2</a></li>
            <li><a href="#">submenu3</a></li>
            
          </ul>
        </li>
         <li class="active"><a href="#">Main menu 2 <span class="sr-only">(current)</span></a></li>
        <li><a href="#">Main menu 3</a></li>
      </ul>     
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>
  </div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js">

Answer 1

if ($(window).width() < 768) {
 $(".dropdown.a").removeClass("disabled");
}

Answer 2

尝试这样的事情，您可以使用inspect元素检查，当您将鼠标悬停在下拉列表中时，disable类将被删除

$(function(){
var $windowWidth = $(window).width();
$('ul.nav').on('mouseover','.dropdown',function(){
    if($windowWidth < 768){
        $(this).find('a').removeClass('disabled');
    }
});
});

查看演示

＆＃13;

$(function(){
	var $windowWidth = $(window).width();
	$('ul.nav').on('mouseover','.dropdown',function(){
	    if($windowWidth < 768){
                $(this).addClass('open');
	        $(this).find('a').removeClass('disabled');
	    }
	});
});

＆＃13;

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">

<div class="container">
<nav class="navbar navbar-default">
  <div class="container">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Bootstrap nav menu</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
       
        <li class="dropdown">
          <a href="https://www.google.com" class="dropdown-toggle disabled" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Main menu 1<span class="caret"></span></a>
          <ul class="dropdown-menu">
            <li><a href="#">submenu1</a></li>
            <li><a href="#">submenu2</a></li>
            <li><a href="#">submenu3</a></li>
            
          </ul>
        </li>
         <li class="active"><a href="#">Main menu 2 <span class="sr-only">(current)</span></a></li>
        <li><a href="#">Main menu 3</a></li>
      </ul>     
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>
  </div>

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

＆＃13;

Answer 3

使用此功能删除768像素屏幕以下禁用的类。

java.lang.NullPointerException
    at com.dynaprice.beans.test.RepricingBeanTest.testHello(RepricingBeanTest.java:45)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:240)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:180)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

＆＃13;

if ($(window).width() < 768) {
  $('a.dropdown-toggle').removeClass('disabled');
}

＆＃13;

if ($(window).width() < 768) {
  $('a.dropdown-toggle').removeClass('disabled');
}
if ($(window).width() > 768) {
            $('ul.nav li.dropdown').hover(function () {
                $(this).find('.dropdown-menu').stop(true, true).delay(600).fadeIn(200);
            }, function () {
                $(this).find('.dropdown-menu').stop(true, true).delay(200).fadeOut(600);
            });
        }

＆＃13;

具有子菜单的Bootstrap导航栏 - 如何在768下删除“禁用”类@media宽度

3 个答案: