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<head>
<title>Timeline | Custom snapping</title>
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<p>
When moving the items in on the Timeline below, they will snap to full hours,
independent of being zoomed in or out.
</p>
<div id="visualization"></div>
<script type="text/javascript">
// DOM element where the Timeline will be attached
var container = document.getElementById('visualization');
// Create a DataSet (allows two way data-binding)
var items = new vis.DataSet([
{id: 1, content: 'A', start: '2015-02-09T04:00:00'},
{id: 2, content: 'B', start: '2015-02-09T14:00:00'},
{id: 3, content: 'C', start: '2015-02-09T16:00:00'},
{id: 4, content: 'D', start: '2015-02-09T17:00:00'},
{id: 5, content: 'E', start: '2015-02-10T03:00:00'}
]);
// Configuration for the Timeline
var options = {
editable: true,
// always snap to full hours, independent of the scale
snap: function (date, scale, step) {
var hour = 60 * 60 * 1000;
return Math.round(date / hour) * hour;
}
// to configure no snapping at all:
//
// snap: null
//
// or let the snap function return the date unchanged:
//
// snap: function (date, scale, step) {
// return date;
// }
};
// Create a Timeline
var timeline = new vis.Timeline(container, items, options);
</script>
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