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Sync Storybook theme with embedding docs site #100

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Merged
einari merged 1 commit into from
Jun 12, 2026
Merged

Sync Storybook theme with embedding docs site #100

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17 changes: 16 additions & 1 deletion Source/.storybook/preview.js
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,20 @@ const ALL_BODY_CLASSES = Object.values(STYLING_MODES)
.map(mode => mode.bodyClass)
.filter(Boolean);

// Tracks the theme pushed from the embedding docs site via postMessage.
// null means "not embedded — use the toolbar selection".
let _docsSiteTheme = null;

window.addEventListener('message', (event) => {
if (event.data?.type !== 'STORYBOOK_THEME_CHANGE') return;
_docsSiteTheme = event.data.theme === 'light' ? 'lara-light' : 'lara-dark';
const mode = STYLING_MODES[_docsSiteTheme];
if (mode) {
applyThemeLink(mode.themeUrl);
applyBodyClass(mode.bodyClass);
}
});

export const globalTypes = {
theme: {
name: 'Styling',
Expand Down Expand Up @@ -92,7 +106,8 @@ function applyBodyClass(className) {

export const decorators = [
(Story, context) => {
const mode = STYLING_MODES[context.globals.theme] ?? STYLING_MODES['lara-dark'];
const themeKey = _docsSiteTheme ?? context.globals.theme ?? 'lara-dark';
const mode = STYLING_MODES[themeKey] ?? STYLING_MODES['lara-dark'];

applyThemeLink(mode.themeUrl);
applyBodyClass(mode.bodyClass);
Expand Down
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