Make popover optional on elements

assets/scripts/src/element.js

@@ -102,19 +102,35 @@ export default class Element {
     return position;
   }
 
+  /**
+   * Is called when element is about to be deselected
+   * i.e. when moving the focus to next element of closing
+   */
   onDeselected() {
-    // Will be called when element is about to be deselected
+    if (!this.popover) {
+      return;
+    }
+
     this.popover.hide();
   }
 
+  /**
+   * Is called when the element is about to be highlighted
+   * i.e. either if overlay has started moving the highlight towards
+   * this element of has just decided to highlight it
+   */
   onHighlightStarted() {
-    // Will be triggered when the element is about to be highlighted
-    // i.e. overlay has started transitioning towards this element
+    if (!this.popover) {
+      return;
+    }
+
     this.showPopover();
   }
 
   onHighlighted() {
-    this.showPopover();
+    if (this.popover) {
+      this.showPopover();
+    }
 
     const highlightedElement = this;
     const lastHighlightedElement = this.overlay.getLastHighlightedElement();
@@ -130,7 +146,7 @@ export default class Element {
         highlightedElement.bringInView();
       }
 
-      if (!popoverElement.isInView()) {
+      if (popoverElement && !popoverElement.isInView()) {
         popoverElement.bringInView();
       }
     }

assets/scripts/src/overlay.js

 import Position from './position';
-import { ID_OVERLAY, OVERLAY_ANIMATE, OVERLAY_OPACITY, OVERLAY_PADDING, OVERLAY_ZINDEX } from './constants';
+import { ID_OVERLAY, OVERLAY_ZINDEX } from './constants';
 
 /**
  * Responsible for overlay creation and manipulation i.e.
@@ -7,20 +7,12 @@ import { ID_OVERLAY, OVERLAY_ANIMATE, OVERLAY_OPACITY, OVERLAY_PADDING, OVERLAY_
  */
 export default class Overlay {
   /**
-   * @param opacity number
-   * @param padding number
-   * @param animate bool
+   * @param options
    * @param window
    * @param document
    */
-  constructor({
-    opacity = OVERLAY_OPACITY,
-    padding = OVERLAY_PADDING,
-    animate = OVERLAY_ANIMATE,
-  }, window, document) {
-    this.opacity = opacity; // Fixed opacity for the layover
-    this.padding = padding; // Padding around the highlighted item
-    this.animate = animate; // Should animate between the transitions
+  constructor(options, window, document) {
+    this.options = options;
 
     this.overlayAlpha = 0;                       // Is used to animate the layover
     this.positionToHighlight = new Position({}); // position at which layover is to be patched at
@@ -93,7 +85,7 @@ export default class Overlay {
 
     // If animation is not required then set the last path to be same
     // as the current path so that there is no easing towards it
-    if (!this.animate || !animate) {
+    if (!this.options.animate || !animate) {
       this.highlightedPosition = this.positionToHighlight;
     }
 
@@ -121,7 +113,10 @@ export default class Overlay {
    */
   clear() {
     this.positionToHighlight = new Position();
-    this.highlightedElement.onDeselected();
+    if (this.highlightedElement) {
+      this.highlightedElement.onDeselected();
+    }
+
     this.highlightedElement = null;
     this.lastHighlightedElement = null;
 
@@ -160,18 +155,18 @@ export default class Overlay {
 
     // Cut the chunk of overlay that is over the highlighted item
     this.removeCloak({
-      posX: this.highlightedPosition.left - this.window.scrollX - this.padding,
-      posY: this.highlightedPosition.top - this.window.scrollY - this.padding,
-      width: (this.highlightedPosition.right - this.highlightedPosition.left) + (this.padding * 2),
-      height: (this.highlightedPosition.bottom - this.highlightedPosition.top) + (this.padding * 2),
+      posX: this.highlightedPosition.left - this.window.scrollX - this.options.padding,
+      posY: this.highlightedPosition.top - this.window.scrollY - this.options.padding,
+      width: (this.highlightedPosition.right - this.highlightedPosition.left) + (this.options.padding * 2),
+      height: (this.highlightedPosition.bottom - this.highlightedPosition.top) + (this.options.padding * 2),
     });
 
     // Fade the overlay in if we can highlight
     if (canHighlight) {
-      if (!this.animate) {
-        this.overlayAlpha = this.opacity;
+      if (!this.options.animate) {
+        this.overlayAlpha = this.options.opacity;
       } else {
-        this.overlayAlpha += (this.opacity - this.overlayAlpha) * 0.08;
+        this.overlayAlpha += (this.options.opacity - this.overlayAlpha) * 0.08;
       }
     } else {
       // otherwise fade out
@@ -193,7 +188,7 @@ export default class Overlay {
       // or the alpha has not yet fully reached fully required opacity
       if (!this.hasPositionHighlighted()) {
         this.redrawAnimation = this.window.requestAnimationFrame(this.draw);
-      } else if (!this.animate && isFadingIn) {
+      } else if (!this.options.animate && isFadingIn) {
         this.redrawAnimation = this.window.requestAnimationFrame(this.draw);
       } else {
         // Element has been highlighted
@@ -207,7 +202,7 @@ export default class Overlay {
 
   hasPositionHighlighted() {
     return this.positionToHighlight.equals(this.highlightedPosition) &&
-      this.overlayAlpha > (this.opacity - 0.05);
+      this.overlayAlpha > (this.options.opacity - 0.05);
   }
 
   /**

assets/scripts/src/sholo.js

@@ -8,6 +8,9 @@ import {
   CLASS_PREV_STEP_BTN,
   ESC_KEY_CODE,
   ID_POPOVER,
+  OVERLAY_ANIMATE,
+  OVERLAY_OPACITY,
+  OVERLAY_PADDING,
 } from './constants';
 
 /**
@@ -19,9 +22,9 @@ export default class Sholo {
    */
   constructor(options = {}) {
     this.options = Object.assign({
-      padding: 10,
-      animate: true,
-      opacity: 0.75,
+      animate: OVERLAY_ANIMATE,     // Whether to animate or not
+      opacity: OVERLAY_OPACITY,     // Overlay opacity
+      padding: OVERLAY_PADDING,     // Spacing around the element from the overlay
     }, options);
 
     this.document = document;
@@ -173,6 +176,7 @@ export default class Sholo {
       }
 
       const elementOptions = Object.assign({}, this.options, step);
+      const popoverOptions = Object.assign({}, this.options, elementOptions.popover || {});
 
       const domElement = this.document.querySelector(step.element);
       if (!domElement) {
@@ -180,8 +184,7 @@ export default class Sholo {
         return;
       }
 
-      // @todo pass the options such as position, button text etc
-      const popover = new Popover(elementOptions, this.window, this.document);
+      const popover = elementOptions.popover ? new Popover(popoverOptions, this.window, this.document) : null;
       const element = new Element(domElement, elementOptions, popover, this.overlay, this.window, this.document);
 
       this.steps.push(element);

index.html

@@ -64,11 +64,22 @@
   });
 
   sholo.defineSteps([
-    { element: '.section__header' },
-    { element: '.section__how' },
-    { element: '.section__purpose' },
-    { element: '.section__examples' },
-    { element: '.section__contributing' },
+    {
+      element: '.section__header'
+    },
+    {
+      element: '.section__how',
+      popover: {}
+    },
+    {
+      element: '.section__purpose',
+    },
+    {
+      element: '.section__examples',
+    },
+    {
+      element: '.section__contributing',
+    },
   ]);
 
   document.querySelector('.btn__example')