<!DOCTYPE HTML> <html> <head> <title>Timeline | Custom snapping</title> <script src="../../../dist/vis.js"></script> <link href="../../../dist/vis-timeline-graph2d.min.css" rel="stylesheet" type="text/css" /> </head> <body> <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> </body> </html>