source/js/core/TL.TimelineConfig.js
function() {
		// counting that dates were sorted in initialization
		var date = this.events[0].start_date;
		if (this.eras && this.eras.length > 0) {
			if (this.eras[0].start_date.isBefore(date)) {
				return this.eras[0].start_date;
			}
		}
		return date;

	}
function() {
		// counting that dates were sorted in initialization
		var date = this.events[0].start_date;
		if (this.eras && this.eras.length > 0) {
			if (this.eras[0].start_date.isBefore(date)) {
				return this.eras[0].start_date;
			}
		}
		return date;

	}
function ( ) { // counting that dates were sorted in initialization var date = this . events [ 0 ] . start_date ; if ( this . eras && this . eras . length > 0 ) { if ( this . eras [ 0 ] . start_date . isBefore ( date ) ) { return this . eras [ 0 ] . start_date ; } } return date ; }
Return the earliest date that this config knows about, whether it's a slide or an era
Return the earliest date that this config knows about whether it s a slide or an era