is()和hasClass()

is()和hasClass()

• jq中的is()有判断元素是否含有某个class的属性，但是hasClass()没有效果。下面是我找的对应的官方的文档，注意仔细阅读文档里面的小demo，并且注意里面的细微区别。

• is()

  https://api.jquery.com/is/
  
  Description: Check the current matched set of elements against a selector, element, or jQuery object and return true if at least one of these elements matches the given arguments.

• hasClass()

  https://api.jquery.com/hasClass/#hasClass-className
  
  Description: Determine whether any of the matched elements are assigned the given class.