需要Javascript在课堂上添加属性 [英] Need Javascript to add an attribute in class
问题描述
亲爱的专家,
i需要一个javascript来在课堂上添加属性...
以下是HTML SELECT的以下Html代码..
< 选择 id = ddl_State 名称 = validation-select < span class =code-attribute> class = select validate [required] >
< 选项 value = > 请选择< / option >
< 选项 value = 1 > 第一个选项< / option >
< 选项 value = 2 > 第二个选项< / option >
< 选项 value = 3 > 第三个选项< / option >
< / select >
我需要一个javascript代码才能在此课程中添加属性..例如:
< 选择 id = ddl_St吃 名称 = validation-select class = select validate [required]已禁用 >
这里我在class属性中添加了Disabled.....
我如何使用javascript添加它,而不删除现有的类属性....
谢谢和问候,
Dileep
使用Javascript,您可以使用 setAttribute() [ ^方法。
var elem = document .getElementById( ddl_State跨度>);
elem.setAttribute( class, 选择验证[必需]已禁用);
使用jQuery,它非常简单:
( #ddl_State)。attr( class, select validate [required] Disabled);
.prop() [< a href =http://api.jquery.com/prop/target =_ blanktitle =新窗口> ^ ]是推荐的方式,并且在较新版本的jQuery中受支持。所以下面的代码更好:
( < span class =code-string>#ddl_State)。prop( class, select validate [required] Disabled);
Dear Experts,
i need a javascript to add an attribute in a class...
Here is the below Html code of HTML SELECT..
<select id="ddl_State" name="validation-select" class="select validate[required]">
<option value="">Please select</option>
<option value="1">First option</option>
<option value="2">Second option</option>
<option value="3">Third options</option>
</select>
I need a javascript code for add an attribute in this class.. Eg :
<select id="ddl_State" name="validation-select" class="select validate[required] Disabled">
Here i have added "Disabled" in the class attribute.....
How can i add this using javascript, without delete the existing class attributes....
Thanks and Regards,
Dileep
Using Javascript, you can do it using setAttribute()[^] method.
var elem = document.getElementById("ddl_State"); elem.setAttribute("class", "select validate[required] Disabled");
Using jQuery, it''s pretty simple:
("#ddl_State").attr("class", "select validate[required] Disabled");
[Edit]
.prop()[^] is recommended way and supported in newer versions of jQuery. So below code is better:
("#ddl_State").prop("class", "select validate[required] Disabled");
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