jQuery e.stopPropagation（） - 如何在不破坏Dropbox功能的情况下使用？ [英] jQuery e.stopPropagation() - how to use without breaking dropbox functionality altogether?

问题描述

短篇小说： stopPropagation（）会阻止下拉菜单关闭 - 这很好。但它也阻止了Dropbox下次打开 - 这很糟糕。

Short story: stopPropagation() prevents a dropdown menu from closing - which is good. But it also prevents the dropbox from opening next time around - which is bad.

长篇故事：
我正在使用Twitter -Bootstrap我在下拉菜单中放了一个搜索框，如下所示：

Long story: I'm using Twitter-Bootstrap and I've put a search box inside the dropdown menu like so:

<div id="search_word_menu" style="position:absolute;right:157px;top:60px;"> 
        <ul class="nav nav-pills">
            <li class="dropdown" id="menu200">
                <a class="dropdown-toggle btn-inverse" data-toggle="dropdown" style="width:117px;position:relative;left:2px" href="#menu200">
                <i class="icon-th-list icon-white"></i>
                    Testing
                    <b class="caret"></b>
                </a>
                <ul class="dropdown-menu">
                    <li><a href="#">Retweets</a></li>
                    <li><a href="#">Favourites</a></li>
                    <li class="divider"></li>
                    <li><a href="#">A list</a></li>
                    <li class="divider"></li>
                    <li><a href="#">A saved search</a></li>
                    <li><a href="#">A saved #hashtag</a></li>
                    <li class="divider"></li>
                    <li>
<!--   HERE -->     <input id="drop_search" type="text" class="search_box_in_menu" value="Search...">

                    </li>
                </ul>
            </li>
        </ul>

当我点击搜索框内部时，默认行为显然是关闭下拉列表 - 但这使得在搜索词中写入相当困难。所以我尝试了e.stopPropagation（），这确实阻止了下拉关闭。然后，当我在搜索框中按Enter键时，我正在使用.toggle（）关闭下拉列表 - 似乎工作正常。

When I click inside the searchbox, the default behaviour is obviously to close the dropdown - but that makes it rather hard to write in a search term. So I've tried with the e.stopPropagation(), which does indeed prevent the dropdown from closing. Then, when I press enter in the searchbox, I'm closing the dropdown with a .toggle() - also seems to work fine.

当我想要再次使用时，问题出现了，因为e.stopPropagation（）现在已经完全禁用了下拉列表 - 即。当我按下拉菜单时，它不再打开！这是因为stopPropagation（），毫无疑问 - 但是我如何解决这个问题，以便我得到上述功能，但不完全打破其余部分？

The PROBLEM arises when I want to to it all again, because the e.stopPropagation() has now disabled the dropdown alltogether - ie. when I press the dropdown menu, it doesn't open anymore! This is because of stopPropagation(), no doubt - but how can I resolve this, so that I get the aforementioned functionality, but without breaking the rest altogether?

jQuery下面：

$(document).ready(function() {
    console.log("document.ready - ");

                //clearing search box on click
    $(".search_box_in_menu").click(function(e) {
        e.stopPropagation(); // works for the specific task
        console.log(".search_box_in_menu - click.");
        if($(this).val() == 'Search...') {
            $(this).val('');
            console.log(".search_box_in_menu - value removed.");

        };
        //return false; //this is e.preventDefault() and e.stopPropagation()


    });

                    // when pressing enter key in search box
    $('.search_box_in_menu').keypress(function(e) {
        var keycode = (e.keyCode ? e.keyCode : e.which);
        if(keycode == '13') {
            console.log(".search_box_in_menu - enter-key pressed.");
            console.log($(this).val());
            $(this).closest('.dropdown-menu').toggle(); //works

        }
    });


    $('.dropdown').click(function() {
        console.log(".dropdown - click.");
        $(this).closest('.dropdown-toggle').toggle(); //does nothing
    });

非常感谢一些帮助！我开始怀疑这可能只是一个引导问题，或者至少是由它们的实现引起的 - 但它超出了我的压力。

Would greatly appreciate some help! I'm starting to suspect this might be a bootstrapped-only problem, or at least caused by their implementation - but it's beyond me atm.

推荐答案

找到解决方案：使用 stopPropagation（），并使用手动触发器关闭框。然后，出于某种原因（是 stopPropagation（）重置？），它可以正常工作。

Found a solution: Using stopPropagation(), and closing box with manual trigger. Then, for some reason (is the stopPropagation() reset?), it works.

//dealing with the dropdown box
$(document).ready(function() {
    console.log("document.ready - ");

    //clearing search box on click and prevent the dropdown from closing
    $(".search_box_in_menu").click(function(e) {
        e.stopPropagation();
        console.log(".search_box_in_menu - click.");
        if($(this).val() == 'Search...') {
            $(this).val('');
            console.log(".search_box_in_menu - value removed.");
        };
        //return false;         

    });

    // when pressing enter key in search box
    $('.search_box_in_menu').keypress(function(e) {
        var keycode = (e.keyCode ? e.keyCode : e.which);
        if(keycode == '13') {
            console.log(".search_box_in_menu - enter-key pressed.");
            console.log($(this).val());
            $(this).closest('.dropdown').trigger('click');
        }
    });

    //resetting a dirty search box
    $('.dropdown').click(function() {
        if ($(this).closest('.search_box_in_menu').val() == 'Search...') {
            console.log(".search_box_in_menu - clean searchbox.");
        }
        console.log(".dropdown - click.");
    });     
});

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