Method back

shepherd.js/src/tour.ts:200–203

* Go to the previous step in the tour

()

   * Go to the previous step in the tour
   */
  back() {
    const index = this.steps.indexOf(this.currentStep as Step);
    this.show(index - 1, false);
  }

  /**
   * Calls _done() triggering the 'cancel' event