javascript - 如何找到 .each() 中的最后一项？

Question

我正在运行以下命令，但我得到了

(index):58 Uncaught TypeError: jQuery.last is not a function

var myId; 
 jQuery.getJSON("https://en.wikipedia.org/w/api.php?action=query&list=embeddedin&eilimit=500&eititle=Template:Infobox&callback=?", {
    disablelimitreport: true,
    format: "json"
  }, function(data) {
    jQuery.each(data.query.embeddedin, function(i, item) {
    var $this = $(this);
    if($this[0] === jQuery.last()[0]) {
       var myId = item.pageid;
    }
    console.log(myId);
    });
  });

JsFidlle查看控制台

Answer 1

只需获取元素的长度并将索引移回。试试这个。希望会在你身上发挥作用。

var myId; 
jQuery.getJSON("https://en.wikipedia.org/w/api.php?
action=query&list=embeddedin&eilimit=500&eititle=Template:Infobox&callback=?", {
   disablelimitreport: true,
   format: "json"
}, function(data) {
  jQuery.each(data.query.embeddedin, function(index, item) { 
     var length = data.query.embeddedin.length;
     if (index === (length - 1)) {
       var myId = item.pageid;
       console.log('The last pageid is : ' + myId);
     } 
  });
});