javascript - 在选项卡上使用 Javascript 的事件状态

Question

有没有一种方法可以使用 Javascript，以便在默认情况下加载页面时，它的第一个选项卡颜色为深绿色。此外，一旦您单击选项卡，事件状态就会变为深绿色。我在 CSS 中设置了它，以便悬停状态变为深绿色，但我需要使用 JavaScript 的事件状态。

非常感谢您的帮助!我从中删除了很多代码。

.tabs_accordion {
  display: block;
  margin: 0 auto;
  max-width: 1200px;
}


.tabs_accordion > input {
  /*position: relative;
  left: -50000px;
  height: 0px;
  line-height: 0;*/
  display: none;
}

.tabs_accordion > input:nth-child(1):checked ~ ul.tabs > li:nth-of-type(1) {
  font-weight: bold;
}
.tabs_accordion > input:nth-child(1):checked ~ div.content > label:nth-of-type(1) {
  font-weight: bold;
  margin-bottom: 0;
}
.tabs_accordion > input:nth-child(1):checked ~ div.content > div:nth-of-type(1) {
  display: block;
  border-top: none;
  background-image:url(picture-1.jpg);
  min-height: 380px;
	background-repeat:no-repeat;
 	-webkit-background-size: contain;
    -moz-background-size: contain;
    background-size: contain;
}
.tabs_accordion > input:nth-child(2):checked ~ ul.tabs > li:nth-of-type(2) {
  font-weight: bold;
}
.tabs_accordion > input:nth-child(2):checked ~ div.content > label:nth-of-type(2) {
  font-weight: bold;
  margin-bottom: 0;
}
.tabs_accordion > input:nth-child(2):checked ~ div.content > div:nth-of-type(2) {
  display: block;
  border-top: none;
  background-image:url(picture-2.jpg);
  min-height: 380px;
	background-repeat:no-repeat;
 	-webkit-background-size: contain;
    -moz-background-size: contain;
    background-size: contain;
}
.tabs_accordion > input:nth-child(3):checked ~ ul.tabs > li:nth-of-type(3) {
  font-weight: bold;
}
.tabs_accordion > input:nth-child(3):checked ~ div.content > label:nth-of-type(3) {
  font-weight: bold;
  margin-bottom: 0;
}
.tabs_accordion > input:nth-child(3):checked ~ div.content > div:nth-of-type(3) {
  display: block;
  border-top: none;
  background-image:url(picture-3.jpg);
  min-height: 380px;
	background-repeat:no-repeat;
 	-webkit-background-size: contain;
    -moz-background-size: contain;
    background-size: contain;
}



.tabs_accordion ul.tabs {
  display: table;
  width: 100%;
  display: none;
  background-color: #deeab4;
  padding: 0;
  margin: 0;
  overflow: hidden;
  box-sizing: border-box;
  -moz-user-select: -moz-none;
  -ms-user-select: none;
  -webkit-user-select: none;
  user-select: none;
  color:#333333;
  font-size: 16px;
}
.tabs_accordion ul.tabs li {
  display: table-cell;
  cursor: pointer;
  width: 238px;
  
}

.tabs_accordion ul.tabs li label:active {
	  background-color: #8cd600;
	
}


/* begin controls hover */
.tabs_accordion [id^="tab"]:checked + label {
  background: green;
}
/* end controls hover */

.tabs_accordion ul.tabs li label {
  display: block;
  height: 74px;
  padding: 20px;
  text-align: center;
  border-left: 2px solid #c8c8c8;
  margin: 0px 0;
  box-sizing: border-box;
  cursor: pointer;
  font-weight: bold;
}
.tabs_accordion ul.tabs li label:focus {
  background-color: #8cd600;
}
.tabs_accordion ul.tabs li label:active {
  background-color: #8cd600;
}
.tabs_accordion ul.tabs li:hover {
  background-color: #8cd600;
   color:#FFFFFF;
}

.tabs_accordion ul.tabs li:hover label {
  border-left-color: transparent;
}
.tabs_accordion ul.tabs li:hover + li > label {
  border-left-color: transparent;
}
.tabs_accordion ul.tabs li:first-child label {
  border-left-color: transparent;
}
.tabs_accordion div.content > label {
  display: block;
  background-color: #deeab4;
  padding: 20px;
  margin-bottom: 1em;
  cursor: pointer;
  -moz-user-select: -moz-none;
  -ms-user-select: none;
  -webkit-user-select: none;
  user-select: none;
  text-align:center;
}
.tabs_accordion div.content > div {
  display: none;
  padding: 10px; 

  margin-bottom: 1em;
}

  .tabs_accordion ul.tabs {
    display: table;
  }
  .tabs_accordion div.content > label {
    display: none;
  }
  .tabs_accordion div.content > div {
    margin-bottom: 0;
  }
	

<div class="tabs_accordion">

<input type="radio" name="tabs" value="tab_2" id="tab_2_content_control" tabindex="0" />
<input type="radio" name="tabs" value="tab_1" id="tab_1_content_control" checked="checked" tabindex="0" />
<input type="radio" name="tabs" value="tab_3" id="tab_3_content_control" tabindex="0" /> 
  
  <ul class="tabs">
    <li><label for="tab_1_content_control">Option 1</label></li>
    <li><label for="tab_2_content_control">Option 2</label></li>
    <li><label for="tab_3_content_control">Option 3</label></li>
  </ul>
  
  <div class="content">
    
    <label for="tab_1_content_control">Option 1</label>
    <div class="tab_1_content">
      
    </div>
      
    <label for="tab_2_content_control">Option 2</label>
    <div class="tab_2_content">
    </div>  
    
    <label for="tab_3_content_control">Option 3</label>
    <div class="tab_3_content">
    </div>    
    
  </div>
</div>

Answer 1

为事件标签添加一个新的CSS类

.activeTab
{  
   background-color: green;
}

在您的文档就绪事件中，您可以获得第一个选项卡项(li 元素)，然后将这个新的 css 类添加到其中。此外，当用户点击时，删除当前事件类并将 activeTab 类设置为新点击的元素。

$(function(){  

  //Make first one active
  $(".tabs>li").first().addClass("activeTab");

  $(".tabs>li").click(function(e){

    var _this = $(this); 

    //Remove existing active one  
    $(".activeTab").removeClass("activeTab");   

   //Set the css class to the clicked one
     _this.addClass("activeTab");

  });


})

Here是一个工作样本。