new(demo): respect prefersReducedMotion and leverage in happo

packages/visx-demo/.happo.js

@@ -28,6 +28,7 @@ module.exports = {
   targets: {
     'chrome-desktop': new RemoteBrowserTarget('chrome', {
       viewport: '800x552',
+      prefersReducedMotion: true,
     }),
   },
 

packages/visx-demo/happo/gallery.tsx

@@ -1,8 +1,5 @@
 import React from 'react';
 import { tiles as examples } from '../src/components/Gallery';
-import AxisTile from '../src/components/Gallery/AxisTile';
-import XYChartTile from '../src/components/Gallery/XYChartTile';
-import { asyncTimeout } from '../.happo-variables.js';
 
 type HappoSnapshot = {
   component: string;
@@ -13,42 +10,13 @@ type HappoSnapshot = {
   };
 };
 
-const specialCases = new Set(['@visx/demo-axis', '@visx/demo-xychart']);
-
-// renders an example with a timeout
-const renderWithTimeout: (
-  Example: React.ReactElement,
-) => HappoSnapshot['variants'][string] = Example => renderInDom => {
-  return new Promise(resolve => {
-    renderInDom(Example);
-    setTimeout(resolve, asyncTimeout);
-  });
-};
-
 const getComponentName = (Example: typeof examples[0]) =>
   Example.packageJson.name || 'missing-name';
 
-const snapshots: HappoSnapshot[] = examples
-  .filter(Example => !specialCases.has(getComponentName(Example)))
-  .map(Example => ({
-    // note: this (reasonably) asserts Examples have unique names
-    component: getComponentName(Example),
-    variants: { default: () => <Example.default /> },
-  }));
+const snapshots: HappoSnapshot[] = examples.map(Example => ({
+  // note: this (reasonably) asserts Examples have unique names
+  component: getComponentName(Example),
+  variants: { default: () => <Example.default /> },
+}));
 
-export default snapshots.concat([
-  // needs timeout for animated axes
-  {
-    component: '@visx/demo-axis',
-    variants: {
-      default: renderWithTimeout(<AxisTile />),
-    },
-  },
-  // needs timeout for animated axes
-  {
-    component: '@visx/demo-xychart',
-    variants: {
-      default: renderWithTimeout(<XYChartTile />),
-    },
-  },
-]);
+export default snapshots;

packages/visx-demo/src/sandboxes/visx-axis/Example.tsx

@@ -2,11 +2,14 @@ import React, { useState, useMemo } from 'react';
 import AreaClosed from '@visx/shape/lib/shapes/AreaClosed';
 import { curveMonotoneX } from '@visx/curve';
 import { scaleUtc, scaleLinear, scaleLog, scaleBand, ScaleInput, coerceNumber } from '@visx/scale';
-import { Orientation, SharedAxisProps, AxisScale } from '@visx/axis';
+import { Axis, Orientation, SharedAxisProps, AxisScale } from '@visx/axis';
+import { GridRows, GridColumns } from '@visx/grid';
 import { AnimatedAxis, AnimatedGridRows, AnimatedGridColumns } from '@visx/react-spring';
 import { getSeededRandom } from '@visx/mock-data';
 import { LinearGradient } from '@visx/gradient';
 import { timeFormat } from 'd3-time-format';
+import { GridRowsProps } from '@visx/grid/lib/grids/GridRows';
+import { GridColumnsProps } from '@visx/grid/lib/grids/GridColumns';
 
 export const backgroundColor = '#da7cff';
 const axisColor = '#fff';
@@ -40,23 +43,51 @@ export type AxisProps = {
   showControls?: boolean;
 };
 
+type AnimationTrajectory = 'outside' | 'center' | 'min' | 'max' | undefined;
+
+type AxisComponent = React.FC<
+  SharedAxisProps<AxisScale> & {
+    animationTrajectory: AnimationTrajectory;
+  }
+>;
+type GridRowsComponent = React.FC<
+  GridRowsProps<AxisScale> & {
+    animationTrajectory: AnimationTrajectory;
+  }
+>;
+type GridColumnsComponent = React.FC<
+  GridColumnsProps<AxisScale> & {
+    animationTrajectory: AnimationTrajectory;
+  }
+>;
+
 export default function Example({
   width: outerWidth = 800,
   height: outerHeight = 800,
   showControls = true,
 }: AxisProps) {
+  // use non-animated components if prefers-reduced-motion is set
+  const prefersReducedMotionQuery = window?.matchMedia('(prefers-reduced-motion: reduce)');
+  const prefersReducedMotion = !prefersReducedMotionQuery || !!prefersReducedMotionQuery.matches;
+  const [useAnimatedComponents, setUseAnimatedComponents] = useState(!prefersReducedMotion);
+
   // in svg, margin is subtracted from total width/height
   const width = outerWidth - margin.left - margin.right;
   const height = outerHeight - margin.top - margin.bottom;
   const [dataToggle, setDataToggle] = useState(true);
-  const [animationTrajectory, setAnimationTrajectory] = useState<
-    'outside' | 'center' | 'min' | 'max'
-  >('center');
+  const [animationTrajectory, setAnimationTrajectory] = useState<AnimationTrajectory>('center');
 
+  // define some types
   interface AxisDemoProps<Scale extends AxisScale> extends SharedAxisProps<Scale> {
     values: ScaleInput<Scale>[];
   }
 
+  const AxisComponent: AxisComponent = useAnimatedComponents ? AnimatedAxis : Axis;
+  const GridRowsComponent: GridRowsComponent = useAnimatedComponents ? AnimatedGridRows : GridRows;
+  const GridColumnsComponent: GridColumnsComponent = useAnimatedComponents
+    ? AnimatedGridColumns
+    : GridColumns;
+
   const axes: AxisDemoProps<AxisScale<number>>[] = useMemo(() => {
     // toggle between two value ranges to demo animation
     const linearValues = dataToggle ? [0, 2, 4, 6, 8, 10] : [6, 8, 10, 12];
@@ -144,7 +175,7 @@ export default function Example({
         <g transform={`translate(${margin.left},${margin.top})`}>
           {axes.map(({ scale, values, label, tickFormat }, i) => (
             <g key={`scale-${i}`} transform={`translate(0, ${i * (scaleHeight + scalePadding)})`}>
-              <AnimatedGridRows
+              <GridRowsComponent
                 // force remount when this changes to see the animation difference
                 key={`gridrows-${animationTrajectory}`}
                 scale={yScale}
@@ -153,7 +184,7 @@ export default function Example({
                 numTicks={dataToggle ? 1 : 3}
                 animationTrajectory={animationTrajectory}
               />
-              <AnimatedGridColumns
+              <GridColumnsComponent
                 // force remount when this changes to see the animation difference
                 key={`gridcolumns-${animationTrajectory}`}
                 scale={scale}
@@ -176,7 +207,7 @@ export default function Example({
                 fill={gridColor}
                 fillOpacity={0.2}
               />
-              <AnimatedAxis
+              <AxisComponent
                 // force remount when this changes to see the animation difference
                 key={`axis-${animationTrajectory}`}
                 orientation={Orientation.bottom}
@@ -208,42 +239,57 @@ export default function Example({
       </svg>
       {showControls && (
         <>
-          <div style={{ fontSize: 11 }}>
-            <strong>animation trajectory</strong>
-            <label>
-              <input
-                type="radio"
-                onChange={() => setAnimationTrajectory('outside')}
-                checked={animationTrajectory === 'outside'}
-              />{' '}
-              outside
-            </label>
-            <label>
-              <input
-                type="radio"
-                onChange={() => setAnimationTrajectory('center')}
-                checked={animationTrajectory === 'center'}
-              />{' '}
-              center
-            </label>
-            <label>
-              <input
-                type="radio"
-                onChange={() => setAnimationTrajectory('min')}
-                checked={animationTrajectory === 'min'}
-              />{' '}
-              min
-            </label>
+          <div style={{ fontSize: 12 }}>
             <label>
               <input
-                type="radio"
-                onChange={() => setAnimationTrajectory('max')}
-                checked={animationTrajectory === 'max'}
+                type="checkbox"
+                onChange={() => setUseAnimatedComponents(!useAnimatedComponents)}
+                checked={useAnimatedComponents}
               />{' '}
-              max
+              enable animation
             </label>
+            &nbsp;&nbsp;&nbsp;
+            {useAnimatedComponents && (
+              <>
+                <strong>animation trajectory</strong>
+                <label>
+                  <input
+                    type="radio"
+                    onChange={() => setAnimationTrajectory('outside')}
+                    checked={animationTrajectory === 'outside'}
+                  />{' '}
+                  outside
+                </label>
+                <label>
+                  <input
+                    type="radio"
+                    onChange={() => setAnimationTrajectory('center')}
+                    checked={animationTrajectory === 'center'}
+                  />{' '}
+                  center
+                </label>
+                <label>
+                  <input
+                    type="radio"
+                    onChange={() => setAnimationTrajectory('min')}
+                    checked={animationTrajectory === 'min'}
+                  />{' '}
+                  min
+                </label>
+                <label>
+                  <input
+                    type="radio"
+                    onChange={() => setAnimationTrajectory('max')}
+                    checked={animationTrajectory === 'max'}
+                  />{' '}
+                  max
+                </label>
+              </>
+            )}
           </div>
-          <button onClick={() => setDataToggle(!dataToggle)}>Update scales</button>
+          {useAnimatedComponents && (
+            <button onClick={() => setDataToggle(!dataToggle)}>Update scales</button>
+          )}
         </>
       )}
     </>

packages/visx-demo/src/sandboxes/visx-pattern/Example.tsx

@@ -21,19 +21,21 @@ export type PatternProps = {
   margin?: typeof defaultMargin;
 };
 
-const Patterns: React.FC<{ id: string }>[] = [
+const Patterns: React.FC<{ id: string; prefersReducedMotion?: boolean }>[] = [
   ({ id }) => <PatternLines id={id} height={6} width={6} stroke="black" strokeWidth={1} />,
-  ({ id }) => (
+  ({ id, prefersReducedMotion }) => (
     <CustomPattern id={id} width={10} height={10}>
-      <animateTransform
-        attributeType="xml"
-        attributeName="patternTransform"
-        type="translate"
-        from="0 0"
-        to="0 30"
-        dur="10s"
-        repeatCount="indefinite"
-      />
+      {!prefersReducedMotion && (
+        <animateTransform
+          attributeType="xml"
+          attributeName="patternTransform"
+          type="translate"
+          from="0 0"
+          to="0 30"
+          dur="10s"
+          repeatCount="indefinite"
+        />
+      )}
       <circle cx={5} cy={5} r="3" stroke="none" fill="black" transform-origin="center" />
     </CustomPattern>
   ),
@@ -78,21 +80,23 @@ const Patterns: React.FC<{ id: string }>[] = [
     />
   ),
   ({ id }) => <PatternCircles id={id} height={10} width={10} fill="black" complement />,
-  ({ id }) => {
+  ({ id, prefersReducedMotion }) => {
     const width = 10;
     const height = 10;
 
     return (
       <CustomPattern id={id} width={width} height={height}>
-        <animateTransform
-          attributeType="xml"
-          attributeName="patternTransform"
-          type="translate"
-          from="0 0"
-          to="50 0"
-          dur="10s"
-          repeatCount="indefinite"
-        />
+        {!prefersReducedMotion && (
+          <animateTransform
+            attributeType="xml"
+            attributeName="patternTransform"
+            type="translate"
+            from="0 0"
+            to="50 0"
+            dur="10s"
+            repeatCount="indefinite"
+          />
+        )}
         <path
           d={`M 0 ${height / 2} c ${height / 8} ${-height / 4} , ${(height * 3) / 8} ${-height /
             4} , ${height / 2} 0
@@ -115,6 +119,10 @@ const Patterns: React.FC<{ id: string }>[] = [
 ];
 
 export default function Example({ width, height, margin = defaultMargin }: PatternProps) {
+  // use non-animated components if prefers-reduced-motion is set
+  const prefersReducedMotionQuery = window?.matchMedia('(prefers-reduced-motion: reduce)');
+  const prefersReducedMotion = !prefersReducedMotionQuery || !!prefersReducedMotionQuery.matches;
+
   const numColumns = 3;
   const numRows = Patterns.length / numColumns;
   const columnWidth = Math.max((width - margin.left - margin.right) / numColumns, 0);
@@ -132,7 +140,7 @@ export default function Example({ width, height, margin = defaultMargin }: Patte
           return (
             <React.Fragment key={id}>
               {/** Like SVG <defs />, Patterns are rendered with an id */}
-              <Pattern id={id} />
+              <Pattern id={id} prefersReducedMotion={prefersReducedMotion} />
 
               {/** And are then referenced for a style attribute. */}
               <Bar