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如何让Bootstrap4的下拉菜单支持悬停和点击两种方式调出

前端开发BootstrapjQuery 887

Bootstrap的类似问题还有：

注意，本页内容仅适用于Bootstrap4，未在更早版本做过测试。

JS核心内容：

$( ".dropdown-menu" ).css('margin-top',0);
$( ".dropdown" )
  .mouseover(function() {
    $( this ).addClass('show').attr('aria-expanded',"true");
    $( this ).find('.dropdown-menu').addClass('show');
  })
  .mouseout(function() {
    $( this ).removeClass('show').attr('aria-expanded',"false");
    $( this ).find('.dropdown-menu').removeClass('show');
  });

HTML结构

      <ul class="nav nav-pills">
        <li class="nav-item">
          <a class="nav-link active uppercase" href="#">Home</a>
        </li>
        <li class="nav-item dropdown">
          <a class="nav-link dropdown-toggle uppercase  outline" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Pages</a>
          <div class="dropdown-menu">
            <a class="dropdown-item uppercase aboutUs" href="#">About us</a>
            <a class="dropdown-item uppercase" href="#">Company</a>
            <a class="dropdown-item uppercase" href="#">Our process</a>
            <a class="dropdown-item uppercase" href="#">Services</a>
            <a class="dropdown-item uppercase" href="#">Contact us</a>
            <a class="dropdown-item uppercase FAQ" href="#">F.A.Q.</a>
          </div>
        </li>
</ul>

另外如果想让菜单超链接生效可以用下面代码实现：

首先你要在连接的文本外加一个容器如<span class='nav-parent'>

		$(document).on("click",".nav-parent",function() {
			
			var $url = $(this).closest("a.nav-link").attr("href");
			console.log($url);
			location.href = $url;
			return false;

		});

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