使用jQuery通过.each（）获取数据属性值 [英] Using jQuery to get data attribute values with .each()

问题描述

我有以下带有数据属性的HTML - 我想编写一些jQuery，它将遍历HTML并收集数据属性并将它们放入数组中 - 任何人都可以帮助我，因为我收到错误。

I have the following HTML with data attributes - I want to write some jQuery that will loop through the HTML and collect the data attributes and put them into an array - could anyone assist as I'm getting an error.

ERROR in console log : item.data is not a function

我正在尝试使用data（）属性 - 你能看到我做错了吗？

I am trying to use the data() attribute - can you see what I'm doing wrong?

//我的HTML代码

// My HTML code

<span class="winners" data-userid="123" data-position="1" data-fullname="neil">
<span class="winners" data-userid="234" data-position="2" data-fullname="Ron">
<span class="winners" data-userid="421" data-position="3" data-fullname="Philip">

//我的jQuery代码

// My jQuery code

var multi = $('.winners');
var winners_array = [];

$.each(multi, function (index, item) {
    winners_array.push( {name: 'fullname', value: item.data('fullname')} );  
});

console.log(winners_array);
// ERROR in console log : item.data is not a function

推荐答案

item 不是jQuery对象，每个的参数是索引和本机DOM元素

item is not a jQuery object, the arguments for each are the index and the native DOM element

var multi = $('.winners');
var winners_array = [];

$.each(multi, function (index, item) {
    winners_array.push( {name: 'fullname', value: $(item).data('fullname')} );  
});

使用地图会更容易

var winners_array = $.map($('.winners'), function(el) {
     return {name: 'fullname', value: $(el).data('fullname')}
});

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