Add getElement and getTarget methods to step (#996)

Added getElement to Step class
Added getTarget to Step class
Added this context to Action callback typescript definition

src/js/step.js

@@ -233,6 +233,22 @@ export class Step extends Evented {
     }
   }
 
+  /**
+   * Returns the element for the step
+   * @return {HTMLElement|null|undefined} The element instance. undefined if it has never been shown, null if it has been destroyed
+   */
+  getElement() {
+    return this.el;
+  }
+
+  /**
+   * Returns the target for the step
+   * @return {HTMLElement|null|undefined} The element instance. undefined if it has never been shown, null if query string has not been found
+   */
+  getTarget() {
+    return this.target;
+  }
+
   /**
    * Creates Shepherd element for step based on options
    *

src/types/step.d.ts

@@ -61,6 +61,18 @@ declare class Step extends Evented {
    * @param {Step.StepOptions} options to be updated
    */
   updateStepOptions(options: Step.StepOptions): void;
+
+  /**
+   * Returns the element for the step
+   * @return The element instance. undefined if it has never been shown, null if it has been destroyed
+   */
+  getElement(): HTMLElement | null | undefined
+
+  /**
+   * Returns the target for the step
+   * @returns The element instance. undefined if it has never been shown, null if query string has not been found
+   */
+  getTarget(): HTMLElement | null | undefined
 }
 
 declare namespace Step {
@@ -231,7 +243,7 @@ declare namespace Step {
      * }
      * ```
      */
-    action?: (() => void);
+    action?: ((this: Tour) => void);
 
     /**
      * Extra classes to apply to the `<a>`