HTML & CSS · Grid Layout · Lesson 14 of 25

Introducing CSS Grid

Concept

Introducing CSS Grid

Setting display: grid turns a container into a two-dimensional layout system of rows and columns.

Unlike Flexbox, which mainly thinks in one direction at a time, Grid lets you define an entire layout's rows and columns together up front, then place items into that structure.

By the end of this lesson

Explain the core idea behind Introducing CSS Grid.
Predict output before running a change.
Test one realistic and one unusual input.
Use the result to make the next decision.

How to study this page

1. Read one concept.
2. Change the example.
3. Run, compare, and explain.
4. Complete the challenge below.

Syntax

.selector {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

ExampleRunnable

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 16px;
}

Try it Yourself »

Mixing fixed and flexible columns

.layout {
  display: grid;
  grid-template-columns: 200px 1fr;
}

Note: fr units share the remaining space proportionally, so 1fr next to a fixed 200px column simply fills whatever space is left.

Self-check before continuing

Without looking at the example, describe what changes when you modify one input in Introducing CSS Grid. Then reopen the editor and prove your explanation with a small test.

You are ready to continue when you can predict, test, and explain the result.

Your turn

Create a 3-column grid with equal-width columns and a 16px gap.

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Console

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