How to left align bootstrap 3 dropdown menu?

问题:

In the above image MenuItems are align to right side of the MyMenu, I needed to left align the MenuItems of MyMenu (I mean it must aligned to left edge of MyMenu), I try to use pull-left and pull-right class like <ul class="dropdown-menu pull-left" role="menu"> with my code, but it doesn't work. anyone has an idea how to do this ?

Here is my code

<!-- Static navbar -->
    <nav class="navbar navbar-inverse" role="navigation">
      <div class="container-fluid">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <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="#"></a>
        </div>
        <div id="navbar" class="navbar-collapse collapse">

              <ul class="nav navbar-nav navbar-right text-uppercase">
                <li><a id="Home" href="index.html">Home</a></li>
                <!-- Visa drapdown-->
                <li class="dropdown">
                  <a href="#" class="dropdown-toggle" data-toggle="dropdown"> My Menu <span class="caret"></span></a>

                  <ul class="dropdown-menu pull-left" role="menu">
                    <li><a href="#">Menu Item 01</a></li>
                      <li><a href="#">Menu Item 01</a></li>
                      <li><a href="#">Menu Item 02</a></li>
                      <li><a href="#">Menu Item 03</a></li>
                      <li><a href="#">Menu Item 04</a></li>
                      <li><a href="#"></a></li>

                    </ul>

                  </li>

            </div><!--/.nav-collapse -->
          </div><!--/.container-fluid -->
        </nav>

回答1:

Adding this style element to the dropdown <ul> will align the dropdown to the left side of the menu item:

left:0;

See this Bootply which targets the .dropdown-menu.pull-left and adds a left:0;. This should solve your problem.

---

Update

I see that Bootstrap has deprecated pull-right and pull-left as of Bootstrap 3.1.0. Use dropdown-menu-left class to use built-in Bootstrap css to align the dropdown on the left edge so you don't need extra CSS. See this updated Bootply

回答2:

for Twitter Bootstrap 3

<div class="dropdown-menu pull-right">
    <!-- write your code here -->
</div>

hope it helps :)

回答3:

For Bootstrap 3.1.0 or above use .dropdown-menu-left or .dropdown-menu-right to display the drop down menus right or left side of the parent menu. In your case try following.

 <li class="dropdown">
    <a href="#" class="dropdown-toggle" data-toggle="dropdown"> My Menu <span class="caret"></span></a>
      <ul class="dropdown-menu dropdown-menu-left" role="menu">
       <!-- write your code here -->
      </ul>
 </li>

Bootstrap is BEST

回答4:

Change navbar-right to navbar-left and add a pull-right class to the UL.

<ul class="nav navbar-nav navbar-left text-uppercase pull-right">

Check out the JSfiddle for an example.

http://jsfiddle.net/eqcpLj6k/1/

回答5:

As the answers given above are too old, would like to provide working solution for Bootstrap 3.3.7.

Use the given css on your .dropdown-menu div :

.dropdown-left-manual {
  right: 0;
  left: auto;
  padding-left: 1px;
  padding-right: 1px;
}

Explaination :

• "right:0;" to make then ending of menu inline with end of dropdown button.
• "left:auto;" to override the left:0 given in dropdown-menu class by bootstrap.
• paddings are used to correct hovers on menu item, can be ignored.