|  | <!DOCTYPE HTML> | 
						
						
							|  | <html> | 
						
						
							|  | <head> | 
						
						
							|  |   <title>Timeline | Custom snapping</title> | 
						
						
							|  | 
 | 
						
						
							|  |   <script src="../../dist/vis.js"></script> | 
						
						
							|  |   <link href="../../dist/vis.css" rel="stylesheet" type="text/css" /> | 
						
						
							|  | <script>(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','//www.google-analytics.com/analytics.js','ga');ga('create', 'UA-61231638-1', 'auto');ga('send', 'pageview');</script></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> |