使用 groupOrder visjs 时间轴对项目进行排序

Question

visjs timeline groupOrder 示例似乎能够对项目进行排序，但我没有看到实际完成此操作的代码——我只看到实际对组进行排序的代码(如果可以使用 groupOrder 对项目进行排序，这似乎比"项目排序"更可取，因为后者的性能限制为 300 个项目(。在此示例中，什么负责订购"项目 2"、"项目 3"和"项目 4"？ http://jsfiddle.net/5p0ggwkx/1369/

<div id="visualization"></div>
var groups = new vis.DataSet([
{id: 0, content: 'First', value: 1},
{id: 1, content: 'Third', value: 3},
{id: 2, content: 'Second', value: 2}
]);
// create a dataset with items
// note that months are zero-based in the JavaScript Date object, so month 3 is April
var items = new vis.DataSet([
{id: 1, group: 0, content: 'item 1', start: new Date(2014, 3, 19), end: new Date(2014, 3, 20)},
{id: 0, group: 0, content: 'item 0', start: new Date(2014, 3, 17), end: new Date(2014, 3, 21)},
{id: 2, group: 1, content: 'item 2', start: new Date(2014, 3, 16), end: new Date(2014, 3, 24)},
{id: 3, group: 1, content: 'item 3', start: new Date(2014, 3, 16), end: new Date(2014, 3, 24)},
{id: 4, group: 1, content: 'item 4', start: new Date(2014, 3, 16), end: new Date(2014, 3, 26)},
{id: 5, group: 2, content: 'item 5', start: new Date(2014, 3, 24), end: new Date(2014, 3, 27)}
]);
// create visualization
var container = document.getElementById('visualization');
var options = {
// option groupOrder can be a property name or a sort function
// the sort function must compare two groups and return a value
//     > 0 when a > b
//     < 0 when a < b
//       0 when a == b
groupOrder: function (a, b) {
return a.value - b.value;
},
editable: true
};
var timeline = new vis.Timeline(container);
timeline.setOptions(options);
timeline.setGroups(groups);
timeline.setItems(items);

Answer 1

要对组内的项目进行排序，您可以根据文档使用order选项。您可以在此处找到更好的解释和工作演示。