data-*カスタムプロパティ

      
sss

sss

  var user = document.getElementById('user')
var uid = user.getAttribute('data-uid')//  data-uid  
console.log(uid)
user.setAttribute('site','http://www.baidu.com')//    site
console.log(user.dataset.birth)

//        'data-flowering'      
document . querySelectorAll ( '[data-flowering]' ) ;
//        'data-text-colour'     red   
document . querySelectorAll ( '[data-text-colour="red"]' ) ;

 
 
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