bower_components/ion.rangeSlider/js/ion.rangeSlider.js
function () {
            var interval = this.result.to - this.result.from;

            if (this.old_min_interval === null) {
                this.old_min_interval = this.options.min_interval;
            }

            this.options.min_interval = interval;
        }
function () {
            var interval = this.result.to - this.result.from;

            if (this.old_min_interval === null) {
                this.old_min_interval = this.options.min_interval;
            }

            this.options.min_interval = interval;
        }
function ( ) { var interval = this . result . to - this . result . from ; if ( this . old_min_interval === null ) { this . old_min_interval = this . options . min_interval ; } this . options . min_interval = interval ; }
Then dragging interval, prevent interval collapsing
using min_interval option
Then dragging interval prevent interval collapsing using min_interval option