Writing Playwright Tests for Hyvä + Alpine.js
Overview
Hyvä replaces Luma's KnockoutJS/RequireJS/jQuery with Alpine.js + Tailwind CSS. Playwright's strict mode (rejects locators matching multiple elements) conflicts with Alpine.js DOM patterns where hidden elements exist throughout the page. This skill documents pitfalls and solutions discovered while writing Playwright tests for Hyvä storefronts.
The #1 Rule: Hidden Alpine Elements
Hyvä templates scatter elements like <div x-show="displayErrorMessage" class="message error"> throughout the DOM. These are invisible but present, so a bare selector like .message.error matches both hidden and visible instances, causing Playwright strict mode violations.
Always scope page-level messages to the #messages container:
await expect(page.locator('.message.success')).toContainText('Added to cart');
await expect(page.locator('.message-error')).toContainText('Error');
await expect(page.locator('#messages .message.success')).toContainText('Added to cart');
await expect(page.locator('#messages .message-error, #messages .message.error')).toContainText('Error');
Never use: bare .message, .message.error, .message.success, or div.message as selectors.
Exception — inline page messages: Not all .message elements are flash messages. The search results "no results" notice (.message.notice) renders as static inline content inside #maincontent, not inside the #messages container. For these inline messages, the bare class selector is correct.
Selector Strategy
Follow Playwright's recommended locator priority:
getByRole() — always prefer — closest to how users perceive the page. Avoids text ambiguity where the same text appears in headings, links, breadcrumbs, and sr-only spans.getByLabel() — for form controls (checkboxes, inputs with associated labels).getByText() — for non-interactive elements, scoped to a container (e.g., page.locator('#maincontent').getByText(...)).getByPlaceholder(), getByAltText() — for inputs and images respectively.getByTestId() — when Hyvä provides data-testid attributes or when adding custom test IDs.- CSS selectors — last resort, only when user-facing locators aren't available. Prefer
aria-* attribute selectors (e.g., [aria-label="pagination"], [aria-current="page"]) over class-based selectors. When CSS is necessary, scope to a unique container (e.g., #messages .message.success).
Avoid: :visible pseudo-selector — per Playwright docs, "it's usually better to find a more reliable way to uniquely identify the element." Scope to a container or use role/attribute selectors instead. Only use :visible as an absolute last resort when the DOM provides no other way to distinguish elements.
Alpine.js Interaction Patterns
| Pattern |
Problem |
Solution |
x-show hidden elements |
Strict mode: multiple matches |
Scope to unique container (#messages), use role/attribute selectors |
x-defer="intersect" |
Element not initialized until visible |
scrollIntoViewIfNeeded() before interacting |
x-if (template) |
Elements don't exist in DOM until condition true |
Click the trigger first, then query children |
x-model on inputs |
Alpine clears value after form submit |
Don't assert input value post-submit; verify via success message |
x-text / x-html async |
Cart badge updates asynchronously |
Use web-first assertions with timeout: not.toHaveText('0', { timeout: 15_000 }) |
x-show submenus |
Hidden until hover |
hover() on parent before clicking child |
| Alpine form reveal |
Fields hidden until checkbox checked |
waitFor({ state: 'visible' }) after checking the checkbox |
press('Enter') on input |
May submit Alpine-bound form unexpectedly |
Prefer explicit .click() on submit button |
Assertions
Always use web-first assertions that auto-wait and retry:
await expect(loc).toBeVisible();
await expect(loc).toContainText('X');
For async Alpine.js updates (cart counts, prices), use extended timeouts on the assertion — never waitForTimeout():
await expect(page.locator('#menu-cart-icon span[x-text="summaryCount"]'))
.not.toHaveText('0', { timeout: 15_000 });
Hyvä vs Luma Selector Differences
| Element |
Hyvä Selector |
Luma Selector |
| Pagination nav |
getByRole('navigation', { name: 'pagination' }) |
ul.pages-items |
| Page link |
getByRole('link', { name: 'Page 2' }) |
.pages-items li a |
| Active page |
[aria-current="page"] |
<strong> element |
| Filter button |
getByRole('button', { name: 'Color filter' }) |
.filter-options-title |
| Cart icon badge |
#menu-cart-icon > span[x-text="summaryCount"] |
.counter-number |
| Account menu |
#customer-menu + nav |
.customer-menu |
| Success message |
#messages .message.success |
.message-success |
| Error message |
#messages .message-error, #messages .message.error |
.message-error |
| Main menu |
getByRole('navigation', { name: 'Main menu' }) |
nav.navigation |
| Footer nav |
getByRole('navigation', { name: 'Company Menu' }).getByRole('link', { name }) |
nav ul li:nth-child(N) a |
| Product image |
#gallery img[itemprop="image"] |
#gallery img:visible |
| Add to Cart (card) |
getByRole('button', { name: /Add to Cart/ }).first() |
button.btn-primary:visible |
References
See references/ for code examples. Load files relevant to the current task:
Always useful:
Page-specific (load when testing that page):
