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Step 2: Default behaviour with the plugin

Run it

In the folder of the tutorial step, run a clean install then build in developer mode:

npm ci
npm start

Sources are in src/ and build result is in dist/.

Check the result

If you open http://localhost:8080/ in a browser, no image should be visible… 😅

Here is a screenshot on desktop:

And here on simulated mobile:

Fortunately, there are alt attributes! 💪

How does it work? (even if you might think it is not)

We installed the plugin:

npm install eleventy-plugin-images-responsiver --save-dev

And here’s what we added to .eleventy.js:

const imagesResponsiver = require('eleventy-plugin-images-responsiver');
eleventyConfig.addPlugin(imagesResponsiver);

This is the simplest way to add the plugin without any specific configuration.

Images are not visible because the transformed HTML (using default configuration) tells the browsers about images with names like colorful-netherlands-320.jpg, colorful-netherlands-560.jpg while we actualy only have one colorful-netherlands.jpg image file.

Now… what?

Let’s see how to provide these resized images to browsers in step 3.