点击x删除y上的类

Question

点击.btn时，我需要关闭（删除类.active）。

可能存在冲突，因为还要点击.item。

它只适用于点击其他.item。

＆＃13;

＆＃13;

$(".item").on("click", function() {
  $(".item").removeClass("active");
  $(this).addClass("active");
});

//$(".btn").on("click", function(){
//  $(".item").removeClass("active");
//});

$(".btn").on("click", function() {
  $(this).parent(".item").removeClass("active");
});

＆＃13;

* {
  box-sizing: border-box;
  transition: 0.5s;
  margin: 0;
  padding: 0;
}

.clear {
  clear: both;
  height: 0;
}

.wrap {
  padding: 20px;
  background: #eee;
  color: #fff;
}

.btn {
  display: block;
  line-height: 100px;
  position: relative;
  z-index: 100;
  font-size: 14px;
  text-align: center;
  cursor: pointer;
}

.btn:hover {
  background: #f00;
}

.item {
  position: relative;
  float: left;
  margin: 2px;
  width: 100px;
  height: 100px;
  text-align: center;
  background: purple;
  overflow: hidden;
}

.item.active {
  overflow: visible;
  width: 200px;
  height: 200px;
}

.large {
  width: 100px;
  height: 100px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
}

.active .large {
  width: 200px;
  height: 200px;
  background: red;
  opacity: 1;
  z-index: 10;
}

.close {
  position: absolute;
  opacity: 0;
  right: 8px;
  bottom: 8px;
  width: 16px;
  height: 16px;
  text-align: center;
  background: black;
  cursor: pointer;
  font-family: Arial;
  font-size: 11px;
}

.active .close {
  opacity: 1;
}

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrap">

  <div class="item">
    <h2 class="btn">item 1</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="item">
    <h2 class="btn">item 2</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="item">
    <h2 class="btn">item 3</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="item">
    <h2 class="btn">item 4</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="item">
    <h2 class="btn">item 5</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="item">
    <h2 class="btn">item 6</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="item">
    <h2 class="btn">item 7</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>

  <div class="clear"></div>
</div>

＆＃13;

＆＃13;

＆＃13;

Answer 1

防止事件冒泡到父“item”。使用event.stopPropagation：

$(".btn").on("click", function(e){
      $(this).parent(".item").removeClass("active");
      e.stopPropagation();
    });

https://developer.mozilla.org/en-US/docs/Web/API/Event/stopPropagation

当然，按照您的设计方式，父母将永远不会收到点击次数。

Answer 2

您需要阻止其中一个按钮中的默认操作，否则将执行两个操作（开启者和关闭操作）。对任何jQuery事件返回false将阻止默认操作并停止事件的传播。

检查我的示例，我将关闭按钮操作更改为span.close元素：

$(".item").on("click", function(){
  $(".item").not($(this)).removeClass("active");
  $(this).addClass("active");
});

$(".close").on("click", function(){
  $(this).closest(".item.active").removeClass("active");
  return false;
});

*{box-sizing:border-box; transition:0.5s; margin:0; padding:0;}
.clear{clear:both; height:0;}
.wrap{padding:20px; background:#eee; color:#fff;}

.btn{display:block; line-height:100px; position:relative; z-index:100; font-size:14px; text-align:center; cursor:pointer;}
.btn:hover{background:#f00;}

.item{position:relative; float:left; margin:2px; width:100px; height:100px; text-align:center; background:purple; overflow:hidden;}
.item.active{overflow:visible; width:200px; height:200px;}

.large{width:100px; height:100px; position:absolute; left:0; top:0; opacity:0;}
.active .large{width:200px; height:200px; background:red; opacity:1; z-index:10;}

.close{position:absolute; opacity:0; right:8px; bottom:8px; width:16px; height:16px; text-align:center; background:black; cursor:pointer; font-family:Arial; font-size:11px;}
.active .close{opacity:1;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrap">

  <div class="item">
    <h2 class="btn">item 1</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
  
  <div class="item">
    <h2 class="btn">item 2</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
  
  <div class="item">
    <h2 class="btn">item 3</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
 
   <div class="item">
    <h2 class="btn">item 4</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
  
  <div class="item">
    <h2 class="btn">item 5</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
  
    <div class="item">
    <h2 class="btn">item 6</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
  
  <div class="item">
    <h2 class="btn">item 7</h2>
    <div class="large">
      <span class="close">x</span>
    </div>
  </div>
  
  <div class="clear"></div>
</div>

Answer 3

切换方法怎么样？

$(".item").on("click", function(){
    $(".item").removeClass("active");
    $(this).toggleClass("active");
});

https://jsfiddle.net/hw15pq6c/1/