77 lines
2.3 KiB
JavaScript
77 lines
2.3 KiB
JavaScript
import Image from '@11ty/eleventy-img';
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import path from 'path';
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import htmlmin from 'html-minifier-terser';
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const stringifyAttributes = (attributeMap) =>
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Object.entries(attributeMap)
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.map(([attribute, value]) => (value === undefined ? '' : `${attribute}="${value}"`))
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.join(' ');
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export const img = async (
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src,
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alt = '',
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className,
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loading = 'lazy',
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shape = '',
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icon,
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maxWidth = 1248,
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sizes = '90vw',
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formats = ['avif', 'webp', 'jpeg']
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) => {
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const isLocal = src?.includes('src/assets');
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const imageExists = async () => {
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try {
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return await fetch(src, { method: 'HEAD' }).then((res) => res.ok);
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} catch {
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return false;
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}
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};
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const generateImage = async () => {
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const widths = [320, 570, 880, 1024, 1248];
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const metadata = await Image(src, {
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widths: widths.filter((width) => width <= maxWidth),
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formats: [...formats],
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outputDir: './_site/assets/img/cache/',
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urlPath: '/assets/img/cache/',
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filenameFormat: (id, src, width, format) => {
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const { name } = path.parse(src);
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return `${name}-${width}w.${format}`;
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},
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});
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const lowsrc = metadata.jpeg[metadata.jpeg.length - 1];
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const imageSources = Object.values(metadata)
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.map(
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(imageFormat) =>
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`<source type="${imageFormat[0].sourceType}" srcset="${imageFormat
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.map((entry) => entry.srcset)
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.join(', ')}" sizes="${sizes}">`
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)
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.join('\n');
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const imgageAttributes = stringifyAttributes({
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src: lowsrc.url,
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width: lowsrc.width,
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height: lowsrc.height,
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alt,
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class: className,
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loading,
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decoding: 'async',
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});
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const imageElement = `<picture>${imageSources}<img ${imgageAttributes} /></picture>`;
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return htmlmin.minify(imageElement, { collapseWhitespace: true });
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};
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const generatePlaceholder = async () => {
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return htmlmin.minify(
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`<div class="flex--centered image__placeholder ${shape}">${icon}</div>`,
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{ collapseWhitespace: true }
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);
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};
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if (process.env.ELEVENTY_PRODUCTION) {
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return isLocal ? await generateImage() : await imageExists().then(async (exists) => (exists ? await generateImage() : await generatePlaceholder()));
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} else {
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return await generatePlaceholder();
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}
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};
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