Lignes de grille et placement automatique
Définissez des lignes explicites avec grid-rows-*, contrôlez le placement automatique avec grid-flow-* et laissez le navigateur positionner intelligemment les éléments.
Lignes de grille et placement automatique est une leçon Tailwind CSS Academy gratuite sur CoddyKit. Ceci est la leçon 3 sur 4. Tu peux lire la leçon complète ci-dessous gratuitement — puis la pratiquer en direct dans le navigateur avec un éditeur de code intégré et un tuteur IA 24/7. Elle fait partie du parcours d'apprentissage Tailwind CSS Academy, et ta progression se synchronise sur le web et l'application CoddyKit. Le cours Tailwind CSS Academy comprend 4 leçons au total.
Certaines parties de cette leçon n'ont pas encore été traduites et s'affichent en anglais.
Explicit vs Implicit Grid Rows
When you place items in a grid, CSS Grid creates rows in two ways: explicitly (you define them with grid-rows-*) or implicitly (the browser generates them automatically when items overflow). Understanding this distinction helps you control heights precisely when you need it, or let the browser handle it when you have variable content.
<!-- Explicit 3-row grid -->
<div class="grid grid-rows-3 grid-cols-2 gap-4 h-48">
<div class="bg-blue-100 p-3">Row 1, Col 1</div>
<div class="bg-blue-100 p-3">Row 1, Col 2</div>
<div class="bg-blue-200 p-3">Row 2, Col 1</div>
<div class="bg-blue-200 p-3">Row 2, Col 2</div>
<div class="bg-blue-300 p-3">Row 3, Col 1</div>
<div class="bg-blue-300 p-3">Row 3, Col 2</div>
</div>The grid-rows-N Utilities
Tailwind provides grid-rows-1 through grid-rows-6 to define explicit row tracks. Under the hood, grid-rows-3 compiles to grid-template-rows: repeat(3, minmax(0, 1fr)). These rows share the available height of the container equally. This is most useful when the container has a fixed or percentage-based height.
<!-- 4 equal rows in a fixed-height dashboard -->
<div class="grid grid-rows-4 gap-2 h-64">
<div class="bg-emerald-100 p-2 rounded">Section 1</div>
<div class="bg-emerald-200 p-2 rounded">Section 2</div>
<div class="bg-emerald-300 p-2 rounded">Section 3</div>
<div class="bg-emerald-400 p-2 rounded">Section 4</div>
</div>Implicit Rows and grid-auto-rows
When more items exist than your explicit rows can hold, the browser creates implicit rows. By default these implicit rows are sized to fit their content. You can control their height using custom CSS or Tailwind's arbitrary value syntax: for example, setting the row height via inline style or using the auto-rows-* utilities available in newer Tailwind versions.
<!-- Implicit rows kick in for items beyond grid-rows-2 -->
<div class="grid grid-cols-2 grid-rows-2 gap-3" style="grid-auto-rows: 80px">
<div class="bg-purple-100 p-3">Explicit row 1</div>
<div class="bg-purple-100 p-3">Explicit row 1</div>
<div class="bg-purple-200 p-3">Explicit row 2</div>
<div class="bg-purple-200 p-3">Explicit row 2</div>
<!-- These create implicit rows at 80px height -->
<div class="bg-purple-300 p-3">Implicit row</div>
<div class="bg-purple-300 p-3">Implicit row</div>
</div>Understanding grid-flow
The grid-flow property controls the auto-placement algorithm — the order in which items fill available grid cells. Tailwind's grid-flow-row (default) fills left-to-right across each row before moving down. grid-flow-col fills top-to-bottom down each column before moving right. This is like the difference between reading a book left-to-right versus reading a newspaper column by column.
<!-- Row flow (default): items fill horizontally -->
<div class="grid grid-cols-3 grid-flow-row gap-3">
<div class="bg-sky-100 p-3">1</div>
<div class="bg-sky-100 p-3">2</div>
<div class="bg-sky-100 p-3">3</div>
<div class="bg-sky-100 p-3">4</div>
</div>grid-flow-col for Column-First Layout
Applying grid-flow-col changes the auto-placement algorithm to fill columns first. Combined with grid-rows-* to limit how tall each column can grow, this creates a newspaper or Pinterest-style vertical card flow. Items fill downward in the first column, then overflow into the next column automatically.
<!-- Column-first flow: items fill downward in each column -->
<div class="grid grid-rows-3 grid-flow-col gap-3">
<div class="bg-rose-100 p-3">Col 1, Row 1</div>
<div class="bg-rose-100 p-3">Col 1, Row 2</div>
<div class="bg-rose-100 p-3">Col 1, Row 3</div>
<div class="bg-rose-200 p-3">Col 2, Row 1</div>
<div class="bg-rose-200 p-3">Col 2, Row 2</div>
<div class="bg-rose-200 p-3">Col 2, Row 3</div>
</div>Dense Auto Placement
grid-flow-dense activates the dense packing algorithm, which allows the browser to fill in holes left by large spanning items. Without dense packing, a grid with spanning items leaves gaps because placement is strictly ordered. Dense packing is ideal for image galleries where you want a tight mosaic with no wasted space.
<!-- Dense packing fills holes left by spanning items -->
<div class="grid grid-cols-3 grid-flow-dense gap-3">
<div class="col-span-2 bg-amber-200 p-3">Wide (spans 2)</div>
<div class="bg-amber-100 p-3">B</div>
<div class="bg-amber-100 p-3">C</div>
<!-- D would normally go after C, but dense fills the hole before B -->
<div class="bg-amber-100 p-3">D</div>
</div>Row and Column Flow Dense Together
You can combine flow direction and density with grid-flow-row-dense or grid-flow-col-dense. The row-dense variant fills rows first but backfills any holes, while col-dense fills columns first and backfills. These are the go-to utilities for gallery-style layouts with mixed card sizes where aesthetics matter more than strict ordering.
<!-- Row-dense: fills rows first, packs holes -->
<div class="grid grid-cols-4 grid-flow-row-dense gap-3">
<div class="col-span-3 bg-teal-300 p-3">Spans 3</div>
<div class="bg-teal-100 p-3">A</div>
<div class="bg-teal-100 p-3">B</div>
<div class="col-span-2 bg-teal-200 p-3">Spans 2</div>
<div class="bg-teal-100 p-3">C</div>
</div>Combining Grid Rows With Columns
Defining both grid-rows-* and grid-cols-* together gives you a fully specified grid template, similar to a spreadsheet. Each cell in this template has a predictable position. This approach works great for dashboard layouts where you know exactly how many sections you need and want precise control over their heights and widths.
<!-- 3-col x 2-row dashboard shell -->
<div class="grid grid-cols-3 grid-rows-2 gap-4 h-64">
<div class="col-span-3 bg-slate-700 text-white p-3 rounded">Header</div>
<div class="bg-slate-100 p-3 rounded">Widget 1</div>
<div class="bg-slate-100 p-3 rounded">Widget 2</div>
<div class="bg-slate-100 p-3 rounded">Widget 3</div>
</div>Custom Row Heights With Arbitrary Values
Tailwind's arbitrary value syntax lets you write any CSS value inside brackets. For grid rows, you can use grid-rows-[100px_1fr_auto] to define a 100px fixed header, a flexible content area, and an auto-sized footer. This is more concise than writing inline styles and benefits from JIT compilation into your production CSS.
<!-- Custom row heights: 60px header, flexible main, auto footer -->
<div class="grid h-screen" style="grid-template-rows: 60px 1fr auto">
<header class="bg-gray-900 text-white flex items-center px-6">
App Header
</header>
<main class="bg-gray-50 p-6 overflow-y-auto">
Main scrollable content
</main>
<footer class="bg-gray-800 text-white p-4 text-center">
Footer
</footer>
</div>Auto Rows in Practice
When building card grids with dynamic content, you often want uniform minimum row heights so short cards do not look dwarfed. Using grid-auto-rows via inline style or Tailwind's JIT arbitrary variant [grid-auto-rows:200px], you can ensure every row is at least as tall as needed. This prevents jarring height inconsistencies in data-driven lists.
<!-- Cards with minimum row height for visual consistency -->
<div class="grid grid-cols-3 gap-4" style="grid-auto-rows: minmax(120px, auto)">
<div class="bg-indigo-100 p-4 rounded">Short card</div>
<div class="bg-indigo-100 p-4 rounded">
<p>Longer card with</p>
<p>more content</p>
<p>filling it out</p>
</div>
<div class="bg-indigo-100 p-4 rounded">Short</div>
</div>Practical App Shell With Grid
Putting it all together, here is a full application shell using CSS Grid for the outer layout. The grid-rows define header, content, and footer heights. Inside the content row, a nested grid-cols-[sidebar_main] pattern divides the screen. This approach is clean, predictable, and requires no absolute positioning or flexbox hacks for the top-level structure.
<div class="grid h-screen" style="grid-template-rows: 56px 1fr 40px">
<header class="bg-indigo-700 text-white px-6 flex items-center">
My App
</header>
<div class="grid overflow-hidden" style="grid-template-columns: 240px 1fr">
<nav class="bg-indigo-50 p-4 overflow-y-auto border-r">
Sidebar nav
</nav>
<main class="p-6 overflow-y-auto">
Page content
</main>
</div>
<footer class="bg-gray-200 text-center text-sm flex items-center justify-center">
Copyright 2024
</footer>
</div>Quick Check
Test your understanding of Tailwind CSS Mastery concepts from this lesson.
Lesson Recap
In this lesson you learned: grid-rows-* defines explicit row tracks with equal heights, grid-flow-row and grid-flow-col control placement direction, and grid-flow-dense backfills holes left by spanning items. Next up we explore gap utilities and alignment controls inside grid containers.
Questions Fréquemment Posées
La leçon « Lignes de grille et placement automatique » est-elle gratuite ?
Oui — le texte complet de « Lignes de grille et placement automatique » est gratuit à lire ici sur le web. Pour la pratiquer de manière interactive (un éditeur de code intégré et un tuteur IA 24/7) et déverrouiller le reste du cours Tailwind CSS Academy, passe à CoddyKit PRO. Le cours Tailwind CSS Academy comprend 4 leçons au total.
Qu'est-ce que j'apprendrai dans « Lignes de grille et placement automatique » ?
Définissez des lignes explicites avec grid-rows-*, contrôlez le placement automatique avec grid-flow-* et laissez le navigateur positionner intelligemment les éléments. Tu pratiques Tailwind CSS Academy avec du code pratique que tu exécutes directement dans le navigateur, et un tuteur IA 24/7 répond à tes questions au fur et à mesure que tu avances dans la leçon.
Dois-je avoir de l'expérience pour commencer Tailwind CSS Academy ?
Aucune expérience préalable n'est requise. Tailwind CSS Academy sur CoddyKit est structuré pour les débutants jusqu'aux apprenants avancés, donc tu peux commencer ici ou depuis le début et avancer à ton rythme. Ceci est la leçon 3 sur 4.
Combien de temps prend la leçon « Lignes de grille et placement automatique » ?
La plupart des leçons CoddyKit prennent environ 5–10 minutes. Chacune est courte et interactive, tu progresses régulièrement et tu repiques exactement où tu t'es arrêté sur le web et l'app.
Peux-tu écrire et exécuter du code dans cette leçon Tailwind CSS Academy ?
Oui. Chaque leçon Tailwind CSS Academy inclut un éditeur de code intégré, tu écris et exécutes du vrai code directement dans ton navigateur et tu reçois des retours IA instantanés — aucune configuration locale requise.
Toutes les leçons de ce cours
- Définir les colonnes d’une grille
- Étendue sur plusieurs colonnes et lignes
- Lignes de grille et placement automatique
- Espacement, justification et alignement dans une grille