HTML & CSS · Responsive Design · Lesson 20 of 25

Responsive Images

Concept

Responsive Images

max-width: 100% keeps images from overflowing their container on any screen size.

display: block also removes the small default gap that appears under inline images, which otherwise shows up as unexplained extra space beneath a picture.

By the end of this lesson

Explain the core idea behind Responsive Images.
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

img {
  max-width: 100%;
  height: auto;
}

ExampleRunnable

img {
  max-width: 100%;
  height: auto;
  display: block;
}

Try it Yourself »

Self-check before continuing

Without looking at the example, describe what changes when you modify one input in Responsive Images. 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

Make an image responsive so it never overflows its parent container.

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Console

Output will appear here...