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eleventy.config.images.js
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eleventy.config.images.js
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const path = require("path");
const eleventyImage = require("@11ty/eleventy-img");
// Full list of formats here: https://www.11ty.dev/docs/plugins/image/#output-formats
// Warning: Avif can be resource-intensive so take care!
const getOptions = (widths) => {
return {
widths: widths || ["auto"],
formats: ["avif", "webp", "auto"],
};
};
const getImageAttributes = (cls, alt, sizes) => {
return {
class: `fr-responsive-img fr-ratio-auto ${cls}`,
alt,
sizes,
loading: "lazy",
decoding: "async",
};
};
const relativeToInputPath = (inputPath, relativeFilePath) => {
let split = inputPath.split("/");
split.pop();
return path.resolve(split.join(path.sep), relativeFilePath);
};
module.exports = (eleventyConfig) => {
// Eleventy Image shortcodes
// https://www.11ty.dev/docs/plugins/image/
eleventyConfig.addAsyncShortcode("image", async function imageShortcode(src, alt, widths, sizes, cls = "") {
let file = relativeToInputPath(this.page.inputPath, src);
const options = getOptions(widths);
options["outputDir"] = path.join(eleventyConfig.dir.output, "img"); // Advanced usage note: `eleventyConfig.dir` works here because we’re using addPlugin.
let metadata = await eleventyImage(file, options);
// TODO loading=eager and fetchpriority=high
return eleventyImage.generateHTML(metadata, getImageAttributes(cls, alt, sizes));
});
eleventyConfig.addAsyncShortcode("imageContent", async function imageContentShortcode(src, alt, widths, sizes, cls = "") {
let file = relativeToInputPath(this.page.inputPath, src);
const options = getOptions(widths);
options["outputDir"] = path.join(eleventyConfig.dir.output, "img"); // Advanced usage note: `eleventyConfig.dir` works here because we’re using addPlugin.
let metadata = await eleventyImage(file, options);
return `
<figure class="fr-content-media" role="group" aria-label="${alt}">
<div class="fr-content-media__img">
${eleventyImage.generateHTML(metadata, getImageAttributes(cls, alt, sizes))}
</div>
<figcaption class="fr-content-media__caption">${alt}</figcaption>
</figure>\n`;
});
// Synchronous method for Nunjucks macros
eleventyConfig.addNunjucksShortcode("imageSync", function imageShortcode(src, alt, widths, sizes, cls = "") {
let file = relativeToInputPath(this.page.inputPath, src);
const options = getOptions(widths);
options["outputDir"] = path.join(eleventyConfig.dir.output, "img"); // Advanced usage note: `eleventyConfig.dir` works here because we’re using addPlugin.
// generate images, while this is async we don’t wait
eleventyImage(file, options);
// get metadata even if the images are not fully generated yet
let metadata = eleventyImage.statsSync(file, options);
return eleventyImage.generateHTML(metadata, getImageAttributes(cls, alt, sizes));
});
eleventyConfig.addFilter("resolvePath", (imagePath, page) => {
return imagePath ? path.resolve(page.inputPath, "..", imagePath) : undefined;
});
};