html5 custom attributes: how to get custom attribute values (with code)-H5 Tutorial-php.cn

html5 custom attributes: how to get custom attribute values (with code)

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Release： 2018-08-09 14:15:36

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This article introduces you to html5 custom attributes: how to obtain custom attribute values (with code). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Custom attributes:

In HTML5 we can customize attributes, the format is as follows data-*="", for example: data-info="I am a custom attribute", through Node.dataset['info'] We can get the custom attribute value.

When we set the format as follows, we need to use camel case format to get it correctly: data-my-name="itcast", get Node.dataset['myName']

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--定义-->
<!--规范：
1.data-开头
2.data-后必须至少有一个字符，多个单词使用-连接
建议：
1.名称应该都使用小写--不要包含任何的大写字符
2.名称中不要有任何的特殊符号
3.名称不要副作用纯数字-->
<p data-school-name="itcast">传智播客</p>
<p data-name="itcast">传智播客</p>

<!--取值-->
<script>
    window.onload=function(){
        var p=document.querySelector("p");
        /*获取自定义属性值*/
        /*将data-后面的单词使用camel命名法连接:必须使用camel合法法获取值否则有可能无法获取到值*/
        //var value=p.dataset["schoolname"];//data-schoolname    就是相当于上面的代码块来着同一个意思来着
        var value=p.dataset["schoolName"];//data-school-name     里面的取值必须第二个单词。的第一个字母必须是大写字母来着
        console.log(value);
    }
</script>
</body>
</html>

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