Method touchstart

resources/vega.min.js:14410–14414

(t)

      this._down === this._active && (this.fire(bv, t), (this._down = null));
    }
    touchstart(t) {
      ((this._touch = this.pickEvent(t.changedTouches[0])),
        this._first && ((this._active = this._touch), (this._first = !1)),
        this.fire(kv, t, !0));
    }
    touchmove(t) {
      this.fire(Av, t, !0);
    }