附加多个值到一个DIV

Question

我使用以下mapbox.js example从GeoJSON的文件过滤功能。这个例子是不言自明 - 第一步是要查找被选中，并建立自己的值的列表所有复选框。

目前，该复选框值都是单一字符串。我的问题很简单，可以value在复选框是一个整数数组（或字符串数​​组？），如果是这样，怎么会在div input附加整数数组来value，这样就可以通过多个值在一次筛选？

for (var i = 0; i < checkboxes.length; i++) { 
     if (checkboxes[i].checked) on.push(checkboxes[i].value); 

<div id='filters' class='ui-select'> 
    <div><input type='checkbox' checked=checked class='filter' 
      name='filter' id='fast-food' value='fast-food'/><label for='fast-food'>fast-food</label></div> 
    <div><input type='checkbox' checked=checked class='filter' 
      name='filter' id='bicycle' value='bicycle'/><label for='bicycle'>bicycle</label></div> 
    <div><input type='checkbox' checked=checked class='filter' 
      name='filter' id='bar' value='bar'/><label for='bar'>bar</label></div> 
</div> 
<div id='map'></div> 

<script> 
L.mapbox.accessToken = 'pk.eyJ1IjoiaXNrYW5kYXJibHVlIiwiYSI6ImNpazE3MTJldjAzYzZ1Nm0wdXZnMGU2MGMifQ.i3E1_b9QXJS8xXuPy3OTcg'; 
var map = L.mapbox.map('map', 'mapbox.dc-markers'); 
var filters = document.getElementById('filters'); 
var checkboxes = document.getElementsByClassName('filter'); 

function change() { 
    // Find all checkboxes that are checked and build a list of their values 
    var on = []; 
    for (var i = 0; i < checkboxes.length; i++) { 
     if (checkboxes[i].checked) on.push(checkboxes[i].value); 
    } 
    // The filter function takes a GeoJSON feature object 
    // and returns true to show it or false to hide it. 
    map.featureLayer.setFilter(function (f) { 
     // check each marker's symbol to see if its value is in the list 
     // of symbols that should be on, stored in the 'on' array 
     return on.indexOf(f.properties['marker-symbol']) !== -1; 
    }); 
    return false; 
} 

// When the form is touched, re-filter markers 
filters.onchange = change; 
// Initially filter the markers 
change(); 
</script> 

Answer 1

你可以充分利用jQuery的.data() method，让您的属性名称和值分配给在DOM元素。您可以在数据元素的值设置为可解析为它自己的整数数组的一个逗号分隔的列表。

一些（未测试的）伪代码作为一个例子：

<div id='filters' class='ui-select'> 
    <div><input type='checkbox' checked=checked class='filter' 
      name='filter' id='fast-food' value='fast-food' data-filter='fast-food,restaurants'/><label for='fast-food'>fast-food</label></div> 
    <div><input type='checkbox' checked=checked class='filter' 
      name='filter' id='bicycle' value='bicycle'/><label for='bicycle' data-filter='bicycle, transportation'>bicycle</label></div> 
    <div><input type='checkbox' checked=checked class='filter' 
      name='filter' id='bar' value='bar' data-filter='bar, restaurants'/><label for='bar'>bar</label></div> 
</div> 

... 

function change() { 
    // Find all checkboxes that are checked and build a list of their values 
    var on = []; 
    for (var i = 0; i < checkboxes.length; i++) { 
     if (checkboxes[i].checked) { 
      var array = $(checkboxes[i]).data("filter").split(','); 
      Array.prototype.push.apply(on,array); 
     } 
    } 

    ... 
}