Why your Tailwind classes aren't showing up
The class is right there in the DOM and nothing happens. Here's why Tailwind never saw it, and four fixes that actually hold up in production.
css
15 Posts
CSS is a free, open standard for styling web pages, first proposed by Håkon Wium Lie in 1994 and maintained by the W3C. It separates presentation from HTML structure, controlling colors, fonts, spacing, and layout through rules that cascade by specificity. Flexbox and Grid handle complex layouts that once needed hacks, while media queries make designs responsive.
Modern additions include custom properties, container queries, and nesting. Browser inconsistencies remain a common frustration.
Height: 100% not working? Here's what's actually happening
A child set to height: 100% collapses to its content size instead of filling the parent. Here's the containing-block rule causing it, the two things everyone tries first, and four real fixes.
Tailwind v4: 'tailwindcss directly as a PostCSS plugin' error, fixed
[postcss] It looks like you're trying to use `tailwindcss` directly as a PostCSS plugin. Every cause of this Tailwind v4 error, plus the silent one that hits next.
Position: sticky not working? Check these five things
position: sticky not working? It's one of five causes: no top value, a clipping ancestor, a short parent, a stretched item, or html + body overflow. Fix each.
Position: sticky not working? It's almost never the sticky element
Position: sticky not working? Six causes ranked by how often they bite: a missing top, an overflow ancestor, flex stretch, a short parent, and one console snippet that finds it.
Why Sass says it can't find a stylesheet that's right there
Sass throws "Can't find stylesheet to import" even though the file exists. Case sensitivity, missing node_modules paths, and two more real causes, fixed one by one.
Tailwind v4: "tailwindcss directly as a PostCSS plugin"
Your Tailwind v4 upgrade throws 'trying to use tailwindcss directly as a PostCSS plugin'? Here's every cause, the sneaky CI-only variant, and the real fix.
Sass @import warning: migrate to @use before Dart Sass 3.0
Sass @import rules are deprecated, removed in Dart Sass 3.0.0. The exact warning, why your build still passes, and how to migrate to @use/@forward cleanly.
Why Tailwind Won't Generate the Class You Just Wrote
The class is sitting right there in your JSX and the browser still ignores it. Here's why Tailwind's scanner can't see it, and how to fix it for good.
Tailwind v4: 'trying to use tailwindcss directly as a PostCSS plugin'
Your Tailwind v4 build dies with 'It looks like you're trying to use tailwindcss directly as a PostCSS plugin': here's every real cause and the actual fix.