javascript - 单击下拉菜单中的属性时更改按钮的文本？

Question

我有一个下拉按钮，当进入网页时，按钮显示“选择区域”。如果将鼠标悬停在该按钮上，您会看到不同的区域。

当他们点击他们想要的区域时，按钮的主要值需要改变。

此外，我希望该按钮位于右侧的搜索栏内，但它始终将其置于其下方，就像您在示例中看到的那样。我尝试了很多不同的选项，但我无法解决这个问题。

html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, code, del, dfn, em, img, q, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font-family: 'Helvetica Neue', Helvetica, Arial, Sans-Serif;
  vertical-align: baseline;
  outline: none;
}

body {
  background: url(../images/background/body_background.png) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.logo img{
  margin-left: auto;
  margin-right: auto;
  display: block;
  margin-top: 50px;
  margin-bottom: 50px;
}

.SearchSummoners {
  margin: auto;
  width: 35%;
  padding: 10px;
  background-color: rgba(0, 0, 0, 0.7);
  border: 1px solid;

  -moz-border-image: -moz-linear-gradient(top, #006184 0%, #303142 100%);
  -webkit-border-image: -webkit-linear-gradient(top, #006184 0%, #303142 100%);
  border-image: linear-gradient(to bottom, #006184 0%, #303142 100%);
  border-image-slice: 1;
}

/* Dropdown Button */
.dropbtn {
    background-color: #4CAF50;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

/* The container <div> - needed to position the dropdown content */
.region_dropdown_section {
    position: relative;
    display: inline-block;
}

/* Dropdown Content (Hidden by Default) */
.region_dropdown_content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

/* Links inside the dropdown */
.region_dropdown_content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

/* Change color of dropdown links on hover */
.region_dropdown_content a:hover {background-color: #f1f1f1}

/* Show the dropdown menu on hover */
.region_dropdown_section:hover .region_dropdown_content {
    display: block;
}

/* Change the background color of the dropdown button when the dropdown content is shown */
.region_dropdown_section:hover .dropbtn {
    background-color: #3e8e41;
}

.Searchbox_Summoners {
  margin: auto;
  display: block;
  width: 65%;
}

#SearchBox{
		margin-right: 10%;
		margin-left:  10%;
		width: 80%;
		background-color: white;
		height: 40px;;
	}

#SearchInput{
		width: 70%;
		line-height: 40px;
		background: white;
		border: 0;
		outline: 0;
		margin: 0;
		padding: 0;
		margin-left: 20px;
    font-size: 24px;
	}

<?php define('DeniedAccessFiles', TRUE); ?>

<?php include 'header.php'; ?>
<div class="logo">
    <img src="https://placeholdit.imgix.net/~text?txtsize=47&txt=500%C3%97225&w=500&h=225">
</div>
  <div class="SearchSummoners">
    <div id="SearchBox">
      <form method="POST">
        <input id="SearchInput" value="Enter the Summoner Name"  onfocus="if(this.value  == 'Enter the Summoner Name') { this.value = ''; } " onblur="if(this.value == '') { this.value = 'Enter the Summoner Name'; }"  type="text" name="SummonerName"></input>
      </form>
    </div>
    <div class="region_dropdown_section">
      <button class="dropbtn">Select Region</button>
      <div class="region_dropdown_content">
        <a href="#">North America</a>
        <a href="#">Europe West</a>
        <a href="#">Europe NE</a>
        <a href="#">Korea</a>
      </div>
    </div>
  </div>
<?php include 'footer.php'; ?>

Answer 1

添加到链接点击触发器和 onclick 更改按钮文本...

更新:修复了空按钮文本

$(document).ready(function(){
  var regionDropDown = $('.region_dropdown_section'),
      regionButton = regionDropDown.find('button'),
      regionList = regionDropDown.find('.region_dropdown_content').children();
  
  $(regionList).on('click', function(e){
    var region = e.target;
    regionButton.text(region.text).val(region.text);
  });
});

html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, code, del, dfn, em, img, q, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td {
  margin: 0;
  padding: 0;
  border: 0;
  font-size: 100%;
  font-family: 'Helvetica Neue', Helvetica, Arial, Sans-Serif;
  vertical-align: baseline;
  outline: none;
}

body {
  background: url(../images/background/body_background.png) no-repeat center center fixed;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.logo img{
  margin-left: auto;
  margin-right: auto;
  display: block;
  margin-top: 50px;
  margin-bottom: 50px;
}

.SearchSummoners {
  margin: auto;
  width: 55%;
  padding: 10px;
  background-color: rgba(0, 0, 0, 0.7);
  border: 1px solid;

  -moz-border-image: -moz-linear-gradient(top, #006184 0%, #303142 100%);
  -webkit-border-image: -webkit-linear-gradient(top, #006184 0%, #303142 100%);
  border-image: linear-gradient(to bottom, #006184 0%, #303142 100%);
  border-image-slice: 1;
}

/* Dropdown Button */
.dropbtn {
    background-color: #4CAF50;
    color: white;
    padding: 16px;
    font-size: 16px;
    border: none;
    cursor: pointer;
}

/* The container <div> - needed to position the dropdown content */
.region_dropdown_section {
    display: inline-block;
  width: calc(20% - 10px);
}

/* Dropdown Content (Hidden by Default) */
.region_dropdown_content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}

/* Links inside the dropdown */
.region_dropdown_content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}

/* Change color of dropdown links on hover */
.region_dropdown_content a:hover {background-color: #f1f1f1}

/* Show the dropdown menu on hover */
.region_dropdown_section:hover .region_dropdown_content {
    display: block;
}

/* Change the background color of the dropdown button when the dropdown content is shown */
.region_dropdown_section:hover .dropbtn {
    background-color: #3e8e41;
}

.Searchbox_Summoners {
  margin: auto;
  display: block;
  width: 65%;
}

#SearchBox{
  display: inline-block;
		margin-right: 10%;
		margin-left:  10%;
		width: 50%;
		background-color: white;
		height: 40px;;
	}

#SearchInput{
		width: 70%;
		line-height: 40px;
		background: white;
		border: 0;
		outline: 0;
		margin: 0;
		padding: 0;
		margin-left: 20px;
    font-size: 24px;
	}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<?php define('DeniedAccessFiles', TRUE); ?>

<?php include 'header.php'; ?>
<div class="logo">
    <img src="https://placeholdit.imgix.net/~text?txtsize=47&txt=500%C3%97225&w=500&h=225">
</div>
  <div class="SearchSummoners">
    <div id="SearchBox">
      <form method="POST">
        <input id="SearchInput" value="Enter the Summoner Name"  onfocus="if(this.value  == 'Enter the Summoner Name') { this.value = ''; } " onblur="if(this.value == '') { this.value = 'Enter the Summoner Name'; }"  type="text" name="SummonerName"></input>
      </form>
    </div>
    <div class="region_dropdown_section">
      <button class="dropbtn">Select Region</button>
      <div class="region_dropdown_content">
        <a href="#">North America</a>
        <a href="#">Europe West</a>
        <a href="#">Europe NE</a>
        <a href="#">Korea</a>
      </div>
    </div>
  </div>
<?php include 'footer.php'; ?>