mirror of https://gitlab.com/curben/blog
64 lines
2.0 KiB
JavaScript
64 lines
2.0 KiB
JavaScript
'use strict'
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/* global hexo */
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/*
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* Embed an image with responsive images in a post
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* https://developer.mozilla.org/en-US/docs/Learn/HTML/Multimedia_and_embedding/Responsive_images
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* Image is resized on-the-fly using Statically Imgpx
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* https://statically.io/imgpx
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* Usage: {% image 'folder/filename.jpg' 'description' %}
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*/
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hexo.extend.tag.register('image', (args) => {
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let [fileName, alt] = args
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if (!alt) alt = ''
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let modern = fileName
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let legacy = fileName
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// /img/ is a reverse proxy of Statically CDN
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// See source/_redirects
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const link = '/img/'
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if (fileName.endsWith('.png') || fileName.endsWith('.jpg')) {
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modern = fileName.concat('?format=webp')
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} else if (fileName.endsWith('.webp')) {
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// Statically has yet to support animated webp
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// https://github.com/marsble/statically/issues/36
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// modern = fileName.concat('?auto_format=false')
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modern = fileName.replace(/\.webp$/, '.gif')
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legacy = fileName.replace(/\.webp$/, '.gif')
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}
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const modernLink = link + modern
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const legacyLink = link + legacy
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const img = `<img
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srcset="${legacyLink}&w=320 320w,
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${legacyLink}&w=468 468w,
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${legacyLink}&w=768 768w,
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${legacyLink} 800w"
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sizes="(max-width: 320px) 320px,
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(max-width: 468px) 468px,
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(max-width: 768px) 768px,
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800px"
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src="${legacyLink}"
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alt="${alt}" loading="lazy">`
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if (fileName.endsWith('.png') || fileName.endsWith('.webp')) {
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return `<a href="${legacyLink}">
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<picture>
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<source type="image/webp"
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srcset="${modernLink}&w=320 320w,
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${modernLink}&w=468 468w,
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${modernLink}&w=768 768w,
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${modernLink} 800w"
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sizes="(max-width: 320px) 320px,
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(max-width: 468px) 468px,
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(max-width: 768px) 768px,
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800px">
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${img}
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</picture></a>`
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} else {
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return `<a href="${legacyLink}">${img}</a>`
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}
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})
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