___|  _ \   |  |    |   |_ _|\ \     / ____|
 |     |   |  |  |    |   |  |  \ \   /  __|
 |   | |   | ___ __|  ___ |  |   \ \ /   |
\____|\___/     _|   _|  _|___|   \_/   _____| 

 --- A GOPHER-LIKE INTERFACE FOR HIVE BLOCKCHAIN ---

判断对象是否为空 js与Jquery区别

BY: @fkoryp | CREATED: Oct. 18, 2018, 8:01 a.m. | VOTES: 1 | PAYOUT: $0.00 | [ VOTE ]
  1. js 
    if(document.getElementById('id')==null)

2 Jqurey

     if($('#id').length==0)

     注意：不可用$('#id')==null判断，因为$('#id')总是返回JQuery对象
TAGS: [ #cn ] [ #js ] [ #jquery ]

Replies

@wf9877 | Oct. 18, 2018, 1:01 p.m. | Votes: 2 | [ VOTE ]

受教

@steemitboard | Oct. 19, 2018, 7:59 a.m. | Votes: 0 | [ VOTE ]

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