52 lines
1.3 KiB
JavaScript
52 lines
1.3 KiB
JavaScript
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const path = require("path");
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const eleventyImage = require("@11ty/eleventy-img");
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function relativeToInputPath(inputPath, relativeFilePath) {
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let split = inputPath.split("/");
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split.pop();
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return path.resolve(split.join(path.sep), relativeFilePath);
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}
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function isFullUrl(url) {
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try {
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new URL(url);
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return true;
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} catch(e) {
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return false;
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}
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}
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module.exports = function(eleventyConfig) {
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// Eleventy Image shortcode
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// https://www.11ty.dev/docs/plugins/image/
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eleventyConfig.addAsyncShortcode("image", async function imageShortcode(src, alt, widths, sizes) {
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// Full list of formats here: https://www.11ty.dev/docs/plugins/image/#output-formats
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// Warning: Avif can be resource-intensive so take care!
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let formats = ["avif", "webp", "auto"];
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let input;
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if(isFullUrl(src)) {
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input = src;
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} else {
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input = relativeToInputPath(this.page.inputPath, src);
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}
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let metadata = await eleventyImage(input, {
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widths: widths || ["auto"],
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formats,
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outputDir: path.join(eleventyConfig.dir.output, "img"), // Advanced usage note: `eleventyConfig.dir` works here because we’re using addPlugin.
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});
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// TODO loading=eager and fetchpriority=high
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let imageAttributes = {
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alt,
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sizes,
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loading: "lazy",
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decoding: "async",
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};
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return eleventyImage.generateHTML(metadata, imageAttributes);
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});
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};
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