{"id":9474,"date":"2026-04-24T10:11:56","date_gmt":"2026-04-24T15:11:56","guid":{"rendered":"https:\/\/frontendmasters.com\/blog\/?p=9474"},"modified":"2026-04-24T10:11:57","modified_gmt":"2026-04-24T15:11:57","slug":"auto-sizes-on-images","status":"publish","type":"post","link":"https:\/\/frontendmasters.com\/blog\/auto-sizes-on-images\/","title":{"rendered":"Auto `sizes` on Images"},"content":{"rendered":"\n<p>Hand-writing\/maintaining a <code>sizes<\/code> attribute is just not going to happen. This is the way.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-bluesky-social wp-block-embed-bluesky-social\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"bluesky-embed\" data-bluesky-uri=\"at:\/\/did:plc:6jsvyhtxrkb4d2wrlwd2avmm\/app.bsky.feed.post\/3mk63jssnx42l\" data-bluesky-cid=\"bafyreicop3kkg7wbvhlmanwvvcop2hea3lks2hihfensdx5eqvfnaeyska\"><p>sizes=&#34;auto&#34; landed in Firefox 150, making responsive images simpler and more reliable. Here&#39;s when you can use it, and how\u2026<\/p>&mdash; <a href=\"https:\/\/bsky.app\/profile\/did:plc:6jsvyhtxrkb4d2wrlwd2avmm?ref_src=embed\">Firefox for Web Developers (@webdevs.firefox.com)<\/a> <a href=\"https:\/\/bsky.app\/profile\/did:plc:6jsvyhtxrkb4d2wrlwd2avmm\/post\/3mk63jssnx42l?ref_src=embed\">2026-04-23T13:10:32.277Z<\/a><\/blockquote><script async src=\"https:\/\/embed.bsky.app\/static\/embed.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Hand-writing\/maintaining a sizes attribute is just not going to happen. This is the way.<\/p>\n","protected":false},"author":1,"featured_media":9475,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"sig_custom_text":"","sig_image_type":"featured-image","sig_custom_image":0,"sig_is_disabled":false,"inline_featured_image":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[29],"tags":[31,133,70,476],"class_list":["post-9474","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-the-beat","tag-html","tag-images","tag-performance","tag-responsive-images"],"acf":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/frontendmasters.com\/blog\/wp-content\/uploads\/2026\/04\/pexels-photo-4072509.jpeg?fit=1733%2C1300&ssl=1","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/posts\/9474","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/comments?post=9474"}],"version-history":[{"count":1,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/posts\/9474\/revisions"}],"predecessor-version":[{"id":9476,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/posts\/9474\/revisions\/9476"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/media\/9475"}],"wp:attachment":[{"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/media?parent=9474"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/categories?post=9474"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/frontendmasters.com\/blog\/wp-json\/wp\/v2\/tags?post=9474"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}