How to check if an element exist , and if it does i want the insertAfter to be not valid.And if the element isn't exist, then i want the insertAfter to be valib but only once.My goal is to send only once insertAfter if an element isn't existing and if it does not send anythingHow to check if an element exist , and if it do
阅读背景：
如果元素存在，Jquery insertAfter只返回一次
来源：互联网
分享到：
