Method _render

resources/vega.min.js:14939–14950

(t, e)

      );
    }
    _render(t, e) {
      return (
        this._dirtyCheck() &&
          (this._dirtyAll && this._clearDefs(),
          this.mark(this._root, t, void 0, e),
          iv(this._root, 1)),
        this.defs(),
        (this._dirty = []),
        ++this._dirtyID,
        this
      );
    }
    dirty(t) {
      t.dirty !== this._dirtyID &&
        ((t.dirty = this._dirtyID), this._dirty.push(t));