juqery change
时间: 2023-09-23 21:08:18 浏览: 109
jQuery中的change事件是指当匹配的元素失去焦点或者其值获得焦点并且改变时触发的事件。该事件可以用来监听表单字段的改变,并在改变时执行相应的操作。在给定的代码示例中,当输入框或下拉菜单的值发生改变时,通过jQuery的change()方法来设置其背景颜色为黄色。具体的代码示例如下:
```html
<html>
<head>
<script type="text/javascript" src="jquery文件"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".field").change(function(){
$(this).css("background-color","#FFFFCC");
});
});
</script>
</head>
<body>
<p>在某个域被使用或改变时,它会改变颜色。</p>
Enter your name: <input class="field" type="text" />
<p>Car: <select class="field" name="cars">
<option value="volvo">Volvo</option>
<option value="saab">Saab</option>
<option value="fiat">Fiat</option>
<option value="audi">Audi</option>
</select></p>
</body>
</html>
```
以上代码中,通过选择器$(".field")来选中具有class="field"的元素,即输入框和下拉菜单。然后通过change()方法来绑定change事件的处理函数,当元素的值发生改变时,会执行函数内的代码,将其背景颜色设置为黄色。这样,当输入框或下拉菜单的值发生改变时,其背景颜色就会变为黄色。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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- *2* [jQuery中change事件用法实例](https://download.csdn.net/download/weixin_38682790/13669268)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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