feat: Add backgroundColor var on LoadingDots (#2991)

Fixes: #2990 

https://canvas.workdaydesign.com/components/indicators/loading-dots/ shows a circle variant for use on gray/dark/image-based backgrounds. Our LoadingDots component styling needed some TLC to allow consumers to set the background color to match this pattern, and our Storybook entries can be updated to show how to achieve this variant.

I also noticed some links to docs were broken in the codebase so I updated that too.

[category:Components
Documentation]

Release Note:
Adds capability to LoadingDots to accept a `loadingDotColor` prop to change loading dots color, with the capability to override that var with a stencil - intended for use with the circle variant for dark backgrounds/images, which is now shown in Storybook with Custom Shape story.
Also adds a `animationDurationMs` prop in the same pattern, with a Custom Color and Animation story in storybook demonstrating the use of both these new props.

Co-authored-by: @mannycarrera4 <mannycarrera4@users.noreply.github.com>
Co-authored-by: manuel.carrera <manuel.carrera@workday.com>
Co-authored-by: @NicholasBoll <nicholas.boll@gmail.com>
Co-authored-by: @alanbsmith <alanbsmith@users.noreply.github.com>
Co-authored-by: @alanbsmith <a.bax.smith@gmail.com>
Co-authored-by: @mannycarrera4 <mannycarrera4@users.noreply.github.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -20,7 +20,7 @@ Optional breaking changes message. If your PR includes breaking changes. It is e
 
 ## Checklist
 
-- [ ] MDX documentation adheres to Canvas Kit's [Documentation Guidelines](https://workday.github.io/canvas-kit/?path=/docs/guides-documentation-guidelines--page)
+- [ ] MDX documentation adheres to Canvas Kit's [Documentation Guidelines](https://workday.github.io/canvas-kit/?path=/docs/guides-documentation-guidelines--docs)
 - [ ] Label `ready for review` has been added to PR
 
 ## For the Reviewer

CONTRIBUTING.md

@@ -1,4 +1,4 @@
 # Contributing to Canvas
 
 You may read our contribution guidelines
-[here](https://workday.github.io/canvas-kit/?path=/docs/guides-contributing--page).
+[here](https://workday.github.io/canvas-kit/?path=/docs/guides-contributing--docs).

modules/react/loading-dots/lib/LoadingDots.tsx

@@ -15,61 +15,71 @@ const keyframesLoading = keyframes({
   },
 });
 
-const singleLoadingDotStencil = createStencil({
+export interface LoadingDotsProps extends CSProps {
+  /**
+   * Applies backgroundColor to loading dots, intended for use with the circle variant design on grey/dark/image-based backgrounds.
+   * @default `system.color.bg.alt.strong`
+   */
+  loadingDotColor?: string;
+  /**
+   * Duration of the loading animation in milliseconds.
+   * @default `40ms`
+   */
+  animationDurationMs?: string;
+}
+
+export const loadingDotsStencil = createStencil({
   vars: {
     animationDurationMs: '40ms',
+    loadingDotColor: system.color.bg.alt.strong,
   },
-  base: ({animationDurationMs}) => ({
-    backgroundColor: system.color.bg.alt.strong,
-    width: system.space.x4,
-    height: system.space.x4,
-    fontSize: system.space.zero,
-    borderRadius: system.shape.round,
-    transform: 'scale(0)',
-    display: 'inline-block',
-    animationName: keyframesLoading,
-    animationDuration: calc.multiply(animationDurationMs, 35),
-    animationIterationCount: 'infinite',
-    animationTimingFunction: 'ease-in-out',
-    animationFillMode: 'both',
-    '&:nth-child(1)': {
-      animationDelay: '0ms',
-    },
-    '&:nth-child(2)': {
-      animationDelay: calc.multiply(animationDurationMs, 4),
-    },
-    '&:nth-child(3)': {
-      animationDelay: calc.multiply(animationDurationMs, 8),
-    },
-  }),
-});
-
-/**
- * The actual loading dot div.
- */
-const LoadingAnimationDot = () => <div {...singleLoadingDotStencil()} />;
-
-/**
- * A simple container for the loading dots.
- */
-const loadingDotsStencil = createStencil({
-  base: {
+  base: ({loadingDotColor, animationDurationMs}) => ({
     display: 'inline-flex',
     gap: system.space.x2,
-  },
+    '& [data-part="loading-animation-dot"]': {
+      backgroundColor: loadingDotColor,
+      width: system.space.x4,
+      height: system.space.x4,
+      fontSize: system.space.zero,
+      borderRadius: system.shape.round,
+      transform: 'scale(0)',
+      display: 'inline-block',
+      animationName: keyframesLoading,
+      animationDuration: calc.multiply(animationDurationMs, 35),
+      animationIterationCount: 'infinite',
+      animationTimingFunction: 'ease-in-out',
+      animationFillMode: 'both',
+      '&:nth-child(1)': {
+        animationDelay: '0ms',
+      },
+      '&:nth-child(2)': {
+        animationDelay: calc.multiply(animationDurationMs, 4),
+      },
+      '&:nth-child(3)': {
+        animationDelay: calc.multiply(animationDurationMs, 8),
+      },
+    },
+  }),
 });
 
 /**
  * A simple component that displays three horizontal dots, to be used when some data is loading.
  */
 export const LoadingDots = createComponent('div')({
   displayName: 'LoadingDots',
-  Component: (elemProps: CSProps, ref, Element) => {
+  Component: (
+    {loadingDotColor, animationDurationMs, ...elemProps}: LoadingDotsProps,
+    ref,
+    Element
+  ) => {
     return (
-      <Element ref={ref} {...handleCsProp(elemProps, loadingDotsStencil())}>
-        <LoadingAnimationDot />
-        <LoadingAnimationDot />
-        <LoadingAnimationDot />
+      <Element
+        ref={ref}
+        {...handleCsProp(elemProps, loadingDotsStencil({loadingDotColor, animationDurationMs}))}
+      >
+        <div data-part="loading-animation-dot" />
+        <div data-part="loading-animation-dot" />
+        <div data-part="loading-animation-dot" />
       </Element>
     );
   },

modules/react/loading-dots/stories/LoadingDots.mdx

@@ -1,7 +1,9 @@
-import {ExampleCodeBlock} from '@workday/canvas-kit-docs';
+import {ExampleCodeBlock, SymbolDoc} from '@workday/canvas-kit-docs';
 import {Basic} from './examples/Basic';
 import {RTL} from './examples/RTL';
 import {Accessible} from './examples/Accessible';
+import {CustomShape} from './examples/CustomShape';
+import {CustomColorAndAnimation} from './examples/CustomColorAndAnimation';
 import * as LoadingDotsStories from './LoadingDots.stories';
 
 <Meta of={LoadingDotsStories} />
@@ -11,7 +13,7 @@ import * as LoadingDotsStories from './LoadingDots.stories';
 Loading Dots make users aware that content is currently being loaded, processing, or that change
 will occur on the page.
 
-[> Workday Design Reference](https://design.workday.com/components/indicators/loading-dots)
+[> Workday Design Reference](https://canvas.workdaydesign.com/components/indicators/loading-dots/)
 
 ## Installation
 
@@ -29,10 +31,20 @@ yarn add @workday/canvas-kit-react
 
 <ExampleCodeBlock code={RTL} />
 
+### Custom Shape
+
+<ExampleCodeBlock code={CustomShape} />
+
+### Custom Color and Animation
+
+<ExampleCodeBlock code={CustomColorAndAnimation} />
+
 ### Custom Styles
 
 Loading Dots supports custom styling via the `cs` prop. For more information, check our
-["How To Customize Styles"](https://workday.github.io/canvas-kit/?path=/docs/styling-how-to-customize-styles--page).
+["How To Customize Styles"](https://workday.github.io/canvas-kit/?path=/docs/styling-how-to-customize-styles--docs).
+
+Custom styling is also supported through the [Loading Dots documented props below](#props).
 
 ### Adding screen reader support to loading animations
 
@@ -50,7 +62,6 @@ components included in Canvas to describe both the appearance and disappearance
 
 <ExampleCodeBlock code={Accessible} />
 
-## Props
+## Component API
 
-Loading Dots does not have any documented props. Undocumented props are spread to its outermost
-element.
+<SymbolDoc name="LoadingDots" fileName="/react/" />

modules/react/loading-dots/stories/LoadingDots.stories.ts

@@ -7,6 +7,8 @@ import {LoadingDots} from '@workday/canvas-kit-react/loading-dots';
 import {Basic as BasicExample} from './examples/Basic';
 import {RTL as RTLExample} from './examples/RTL';
 import {Accessible as AccessibleExample} from './examples/Accessible';
+import {CustomShape as CustomShapeExample} from './examples/CustomShape';
+import {CustomColorAndAnimation as CustomColorAndAnimationExample} from './examples/CustomColorAndAnimation';
 
 export default {
   title: 'Components/Indicators/Loading Dots',
@@ -30,3 +32,9 @@ export const RTL: Story = {
 export const Accessible: Story = {
   render: AccessibleExample,
 };
+export const CustomShape: Story = {
+  render: CustomShapeExample,
+};
+export const CustomColorAndAnimation: Story = {
+  render: CustomColorAndAnimationExample,
+};

modules/react/loading-dots/stories/examples/Accessible.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 import {LoadingDots} from '@workday/canvas-kit-react/loading-dots';
-import {base, system} from '@workday/canvas-tokens-web';
+import {system} from '@workday/canvas-tokens-web';
 import {Flex} from '@workday/canvas-kit-react/layout';
 import {SecondaryButton} from '@workday/canvas-kit-react/button';
 import {createStyles} from '@workday/canvas-kit-styling';

modules/react/loading-dots/stories/examples/CustomColorAndAnimation.tsx

@@ -0,0 +1,19 @@
+import React from 'react';
+import {LoadingDots} from '@workday/canvas-kit-react/loading-dots';
+import {system} from '@workday/canvas-tokens-web';
+import {createStyles} from '@workday/canvas-kit-styling';
+
+const styleOverrides = {
+  parentContainer: createStyles({
+    display: 'flex',
+    gap: system.space.x4,
+  }),
+};
+
+export const CustomColorAndAnimation = () => {
+  return (
+    <div className={styleOverrides.parentContainer}>
+      <LoadingDots loadingDotColor={system.color.fg.primary.default} animationDurationMs="60ms" />
+    </div>
+  );
+};

modules/react/loading-dots/stories/examples/CustomShape.tsx

@@ -0,0 +1,32 @@
+import React from 'react';
+import {LoadingDots, loadingDotsStencil} from '@workday/canvas-kit-react/loading-dots';
+import {system} from '@workday/canvas-tokens-web';
+import {createStyles, createStencil} from '@workday/canvas-kit-styling';
+
+const styleOverrides = {
+  parentContainer: createStyles({
+    display: 'flex',
+    gap: system.space.x4,
+  }),
+};
+
+const loadingStencil = createStencil({
+  base: {
+    borderRadius: system.shape.round,
+    backgroundColor: system.color.bg.overlay,
+    height: 80,
+    width: 80,
+    alignItems: 'center',
+    justifyContent: 'center',
+    display: 'flex',
+    [loadingDotsStencil.vars.loadingDotColor]: system.color.icon.inverse,
+  },
+});
+
+export const CustomShape = () => {
+  return (
+    <div className={styleOverrides.parentContainer}>
+      <LoadingDots cs={loadingStencil()} />
+    </div>
+  );
+};