Frontend

Give tooltips accessible names so their text is announced with the trigger

Build custom tree widgets with correct treeitem and group roles and names

Find and remove ARIA attributes that do not exist in the ARIA spec

Check that ARIA attributes use values the spec allows, like true or mixed

Add audio description tracks so blind and low vision viewers follow video content

Remove autofocus from form fields so screen reader users are not interrupted

Stop autoplaying audio and video that surprises users and hurts accessibility

Find links and resource URLs that common ad blocker lists will block

Build breadcrumb navigation with landmark and current page markup for screen readers

Fix malformed HTML such as unclosed tags and nested elements in invalid places

Find and fix broken image references on pages and in templates

Give icon-only and empty buttons accessible names for screen readers

Make image carousels keyboard operable with pause controls and labeled slides

Organize CSS with cascade layers to fix specificity fights in large codebases

Declare UTF-8 charset in HTML so text renders correctly across browsers

Strip HTML comments and debug code from production templates and builds

Remove console.log calls from production bundles so logs do not leak data

Replace var with const and let to avoid hoisting and scope bugs in JavaScript

Use container queries so components adapt to their own width, not the viewport

Check that page meaning and reading order still work with CSS turned off

Use CSS @property to animate custom properties and type design tokens

Apply CSS containment to limit repaints to the parts of the page that change

Use CSS custom properties as design tokens for colors, spacing and type

Use CSS Grid for two-dimensional page and component layouts

Order stylesheets so cascade rules resolve in the intended sequence

Add a print stylesheet so pages print cleanly without navigation or ads

Format prices, numbers and dates with Intl APIs instead of hand-built strings

Make Web Components handle ARIA, keyboard input and form association correctly

Support dark mode with prefers-color-scheme in your stylesheets

Hide decorative images and icons from screen readers so they do not add noise

Load scripts with defer, async or type module so HTML parsing is not blocked

Structure term and definition pairs with correct dl, dt and dd markup

Set explicit width and height on images to stop layout shift during load

Set the dir attribute so right to left languages render in the correct direction

Wrap definition items in a dl list so their structure is valid HTML

Check that every HTML document starts with a valid doctype declaration

Give drag and drop interfaces keyboard and screen reader alternatives

Keep IDs unique on interactive elements so labels and events hit the right node

Keep IDs unique for elements that ARIA attributes reference

Find layout breaks caused by ad blocker rules that hide common class names

Move embedded and inline styles into external stylesheets for easier caching

Make sure every heading contains text so screen readers announce a title

Fix empty and broken links that have no text or destination for users

Add error handling to client scripts so failures do not break the whole page

Show a fallback when images fail to load instead of a broken icon

Use ES module import and export syntax to structure JavaScript code

Attach one event listener to a parent for dynamic child elements

Set up a correct favicon link in the head for browser tabs and bookmarks

Provide favicons for every device, from touch icons to Android and Windows