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Merged
domlander merged 3 commits into from
Mar 10, 2026
Merged

Slim Homepage AB test - Slimify all sections #15487

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f1d4c66
Slimify all sections and reduce font size in AB test
domlander Mar 5, 2026
b84c8b8
Temporarily comment out an AB test requirement for testing
domlander Mar 5, 2026
8f2ad68
Put sublinks in correct place for AB test
domlander Mar 6, 2026
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6 changes: 3 additions & 3 deletions ab-testing/config/abTests.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -109,14 +109,14 @@ const ABTests: ABTest[] = [
{
name: "fronts-and-curation-slim-homepage",
description:
"Test placing the Most Viewed and Deeply Read components in the right-hand column on the homepage.",
"Test slimming content and placing Most Popular components on the right-hand side on the UK front.",
owners: ["fronts.and.curation@guardian.co.uk"],
status: "ON",
expirationDate: `2026-04-28`,
expirationDate: "2026-04-28",
type: "server",
audienceSize: 0 / 100,
audienceSpace: "A",
groups: ["control", "variant"],
groups: ["control", "variant-one", "variant-two"],
shouldForceMetricsCollection: false,
},
{
Expand Down
22 changes: 21 additions & 1 deletion dotcom-rendering/src/components/Card/Card.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -167,6 +167,7 @@ export type Props = {
headlinePosition?: 'inner' | 'outer';
isStorylines?: boolean;
starRatingSize?: RatingSizeType;
isInSlimHomepageAbTestVariant?: boolean;
};

const waveformWrapper = (
Expand Down Expand Up @@ -406,6 +407,7 @@ export const Card = ({
isStorylines = false,
starRatingSize = 'small',
articleMedia,
isInSlimHomepageAbTestVariant,
}: Props) => {
const hasSublinks = supportingContent && supportingContent.length > 0;
const sublinkPosition = decideSublinkPosition(
Expand Down Expand Up @@ -701,6 +703,14 @@ export const Card = ({
return <Sublinks />;
}

if (isInSlimHomepageAbTestVariant) {
return (
<Hide until="wide">
<Sublinks />
</Hide>
);
}

return (
<Hide from={isFlexSplash ? 'desktop' : 'tablet'}>
<Sublinks />
Expand All @@ -712,7 +722,7 @@ export const Card = ({
if (!hasSublinks) return null;
if (sublinkPosition !== 'inner') return null;

return (
const Sublinks = () => (
<Hide until={isFlexSplash ? 'desktop' : 'tablet'}>
{isStorylines ? (
<SupportingKeyStoriesContent
Expand All @@ -736,6 +746,16 @@ export const Card = ({
)}
</Hide>
);

if (isInSlimHomepageAbTestVariant) {
return (
<Hide from="wide">
<Sublinks />
</Hide>
);
}

return <Sublinks />;
};

const determinePadContent = (
Expand Down
23 changes: 20 additions & 3 deletions dotcom-rendering/src/components/CardHeadline.tsx
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import { css } from '@emotion/react';
import {
between,
from,
headlineMedium14,
headlineMedium15,
headlineMedium17,
Expand Down Expand Up @@ -142,6 +143,7 @@ export enum FontFamily {
export type HeadlineSize = keyof typeof fontFamilies.headlineMedium;

export type ResponsiveFontSize = {
wide?: HeadlineSize;
desktop: HeadlineSize;
tablet?: HeadlineSize;
mobile?: HeadlineSize;
Expand All @@ -151,7 +153,7 @@ export type ResponsiveFontSize = {
const getFontSize = (sizes: ResponsiveFontSize, family: FontFamily) => {
const font = fontFamilies[family];

const { desktop, tablet, mobileMedium, mobile } = sizes;
const { wide, desktop, tablet, mobileMedium, mobile } = sizes;

return css`
${font[desktop]};
Expand All @@ -176,6 +178,13 @@ const getFontSize = (sizes: ResponsiveFontSize, family: FontFamily) => {
${font[mobileMedium]};
}
`}

${wide &&
css`
${from.wide} {
${font[wide]};
}
`}
`;
};

Expand Down Expand Up @@ -204,15 +213,23 @@ export const WithLink = ({
return <>{children}</>;
};

/**
* headline medium 20 on desktop and headline medium 17 on tablet and mobile
*/
export const defaultFontSizes: ResponsiveFontSize = {
desktop: 'xsmall',
tablet: 'xxsmall',
mobile: 'xxsmall',
};

export const CardHeadline = ({
headlineText,
format,
showQuotes,
kickerText,
showPulsingDot,
hasInlineKicker,
/** headline medium 20 on desktop and headline medium 17 on tablet and mobile */
fontSizes = { desktop: 'xsmall', tablet: 'xxsmall', mobile: 'xxsmall' },
fontSizes = defaultFontSizes,
Comment on lines +216 to +232
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@abeddow91 abeddow91 Mar 10, 2026

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👍

byline,
showByline,
linkTo,
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17 changes: 17 additions & 0 deletions dotcom-rendering/src/components/DecideContainer.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,7 @@ type Props = {
frontId?: string;
collectionId: number;
containerLevel?: DCRContainerLevel;
isInSlimHomepageAbTestVariant?: boolean;
};

export const DecideContainer = ({
Expand All @@ -62,6 +63,7 @@ export const DecideContainer = ({
frontId,
collectionId,
containerLevel,
isInSlimHomepageAbTestVariant = false,
}: Props) => {
switch (containerType) {
case 'dynamic/fast':
Expand Down Expand Up @@ -244,6 +246,9 @@ export const DecideContainer = ({
imageLoading={imageLoading}
aspectRatio={aspectRatio}
collectionId={collectionId}
isInSlimHomepageAbTestVariant={
isInSlimHomepageAbTestVariant
}
/>
);
case 'flexible/general':
Expand All @@ -257,6 +262,9 @@ export const DecideContainer = ({
aspectRatio={aspectRatio}
containerLevel={containerLevel}
collectionId={collectionId}
isInSlimHomepageAbTestVariant={
isInSlimHomepageAbTestVariant
}
/>
);
case 'scrollable/small':
Expand Down Expand Up @@ -284,6 +292,9 @@ export const DecideContainer = ({
serverTime={serverTime}
aspectRatio={aspectRatio}
sectionId={sectionId}
isInSlimHomepageAbTestVariant={
isInSlimHomepageAbTestVariant
}
/>
</Island>
);
Expand All @@ -296,6 +307,9 @@ export const DecideContainer = ({
serverTime={serverTime}
imageLoading={imageLoading}
aspectRatio={aspectRatio}
isInSlimHomepageAbTestVariant={
isInSlimHomepageAbTestVariant
}
/>
);
case 'scrollable/feature':
Expand All @@ -308,6 +322,9 @@ export const DecideContainer = ({
serverTime={serverTime}
aspectRatio={aspectRatio}
collectionId={collectionId}
isInSlimHomepageAbTestVariant={
isInSlimHomepageAbTestVariant
}
/>
</Island>
);
Expand Down
12 changes: 12 additions & 0 deletions dotcom-rendering/src/components/FlexibleGeneral.stories.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -160,13 +160,17 @@ const meta = {
imageLoading: 'eager',
aspectRatio: '5:4',
collectionId: 1,
isInSlimHomepageAbTestVariant: false,
},
render: ({ frontSectionTitle, ...args }) => (
<FrontSection
title={frontSectionTitle}
discussionApiUrl={discussionApiUrl}
editionId="UK"
showTopBorder={true}
slimifySectionForSlimHomepageAbTest={
args.isInSlimHomepageAbTestVariant
}
>
<FlexibleGeneral {...args} />
</FrontSection>
Expand All @@ -193,6 +197,14 @@ export const SplashWithStandards: Story = {
},
};

export const SplashWithStandardsInSlimHomepageAbTest: Story = {
name: 'Splash with big and standard cards in the Slim Homepage AB Test',
args: {
...SplashWithStandards.args,
isInSlimHomepageAbTestVariant: true,
},
};

export const SplashWithSublinks: Story = {
name: 'Standard splash with sublinks',
args: {
Expand Down
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