Dynamic dropdown menu with bootstrap not working

问题

I have been using bootstrap for a while, and I came across an issue when trying to add a dropdown menu dynamically.

This is the JavaScript that I have:

$(document).ready(function() {
 $("#clickHere").click(function(){
        $("#appendHere").html("<div class=\"dropdown\" style=\"display:inline;\"><a id=\"drop1\" href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\"><b class=\"caret\"></b></a><ul class=\"dropdown-menu pull-left\"><li><button>Analyse Now</button></li><li class=\"divider\"></li><li><button>Analyse Later</button></li></ul></div>");
 });

 $('#drop1').on('click', function(e){
  e.stopPropagation();
  $(".dropdown-toggle").dropdown('toggle');
 });
});

Here is the HTML:

<ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu" style="display: block; position: static; margin-bottom: 5px; *width: 180px;">
    <li><a tabindex="-1" href="#">Action</a></li>
    <li><a tabindex="-1" href="#">Another action</a></li>
    <li><a tabindex="-1" href="#">Something else here</a></li>
    <li class="divider"></li>
    <li class="dropdown-submenu pull-left"> <a tabindex="-1" href="#">More options</a>
        <ul class="dropdown-menu" id="mainMenu">
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
        </ul>
    </li>
</ul>

<button id="clickHere">Click here </button>
<div id="appendHere"></div>

Here is the fiddle http://jsfiddle.net/szx4Y/83/

The dropdown added dynamically does not work properly. I have managed to make it work in my code, but it only appears once anyway.

Can anyone help me out?

Thanks!

回答1:

Here is a working jsFiddle: http://jsfiddle.net/szx4Y/85/.

FYI, your jsFiddle didn't work because you didn't include the Bootstrap script file. So if you were doing any testing there that wouldn't have worked.

I changed your code to call $(".dropdown-toggle").dropdown(); immediately after you append your HTML. By calling that method you are setting up the elements to handle all the Bootstrap functionality (click events, etc); there's no reason to call it every time you click your new element.

Relevant Code

HTML

<ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu" style="display: block; position: static; margin-bottom: 5px; *width: 180px;">
    <li><a tabindex="-1" href="#">Action</a></li>
    <li><a tabindex="-1" href="#">Another action</a></li>
    <li><a tabindex="-1" href="#">Something else here</a></li>
    <li class="divider"></li>
    <li class="dropdown-submenu pull-left"> <a tabindex="-1" href="#">More options</a>
        <ul class="dropdown-menu" id="mainMenu">
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
            <li><a tabindex="-1" href="#">Second level link</a></li>
        </ul>
    </li>
</ul>

<button id="clickHere">Click here </button>
<div id="appendHere"></div>

Javascript

$(document).ready(function() {
    $("#clickHere").click(function(){
            $("#appendHere").html("<div class=\"dropdown\" style=\"display:inline;\"><a id=\"drop1\" href=\"#\" class=\"dropdown-toggle\" data-toggle=\"dropdown\"><b class=\"caret\"></b></a><ul class=\"dropdown-menu pull-left\"><li><button>Analyse Now</button></li><li class=\"divider\"></li><li><button>Analyse Later</button></li></ul></div>");
    });

    $('.dropdown-toggle').dropdown();
});

CSS

.dropdown-menu {
    float:right;
}

来源：https://stackoverflow.com/questions/20247981/dynamic-dropdown-menu-with-bootstrap-not-working

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