jQuery UI Slider - Snap to increments

$(function() { $( "#slider" ).slider({ value:100, min: 0, max: 500, step: 50, slide: function( event, ui ) { $( "#amount" ).val( "$" + ui.value ); } }); $( "#amount" ).val( "$" + $( "#slider" ).slider( "value" ) ); });

Donation amount ($50 increments):

Increment slider values with the step option set to an integer, commonly a dividend of the slider's maximum value. The default increment is 1.