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class="devsite-playlist--header-details"> <div class="devsite-playlist--header-details-info"> <h1 class="devsite-playlist-title">Learn Images</h1> <div class="devsite-playlist-details"></div> <p> An in-depth course on images for the web.<br> <a class="button devsite-playlist-return-button gc-analytics-event" data-category="devsite-playlist: go back button" hidden> Go back </a> </p> <div class="devsite-playlist-summary"> <div> </div> <div class="devsite-playlist-summary-details"> </div> <div> </div> </div> </div> <div class="devsite-playlist--header-badge-info"> </div> </div> </div> </div> <div class="devsite-playlist--sections"> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/welcome" path="https://web.dev/learn/images/welcome" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Welcome to Learn Images! </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> An in-depth course on images for the web. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/welcome" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/welcome"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/history" path="https://web.dev/learn/images/history" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> A brief history of images on the web </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> A history of images on the web, starting with the image element in 1993 </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/history" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/history"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/performance-issues" path="https://web.dev/learn/images/performance-issues" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Key performance issues </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Learn ways to ensure that your image requests are as small and performant as possible. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/performance-issues" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/performance-issues"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/vector-images" path="https://web.dev/learn/images/vector-images" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Vector images </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Learn about SVG, the vector image format used on the web. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/vector-images" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/vector-images"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/raster-images" path="https://web.dev/learn/images/raster-images" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Raster images </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Discover raster images, such as JPEG, GIF, PNG, and WebP. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/raster-images" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/raster-images"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/gif" path="https://web.dev/learn/images/gif" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Image formats: GIF </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Understand the GIF image format, along with an explanation of how image encoding works. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/gif" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/gif"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/png" path="https://web.dev/learn/images/png" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Image formats: PNG </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Find out when PNG is the best image format to choose. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/png" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/png"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/jpeg" path="https://web.dev/learn/images/jpeg" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Image formats: JPEG </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Learn about the most common image format on the web. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/jpeg" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/jpeg"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/webp" path="https://web.dev/learn/images/webp" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Image formats: WebP </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Learn about WebP, and understand the difference between this format and others. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/webp" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/webp"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/avif" path="https://web.dev/learn/images/avif" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Image formats: AVIF </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> AV1 Image File Format (AVIF) is an encoding based on the open source AV1 video codec. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/avif" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/avif"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/responsive-images" path="https://web.dev/learn/images/responsive-images" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Responsive images </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> A deep dive into responsive images. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/responsive-images" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/responsive-images"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/descriptive" path="https://web.dev/learn/images/descriptive" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Descriptive syntaxes </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Using srcset and sizes to provide the browser with information about image sources and how they'll be used. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/descriptive" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/descriptive"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/prescriptive" path="https://web.dev/learn/images/prescriptive" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Prescriptive syntaxes </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Find out about the picture element. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/prescriptive" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/prescriptive"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/automating" path="https://web.dev/learn/images/automating" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Automating compression and encoding </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Make generating highly performant image sources a seamless part of your development process. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/automating" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/automating"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/cms" path="https://web.dev/learn/images/cms" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Site Generators, frameworks, and CMSs </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Discover how CMSs such as WordPress, and other site generators can make it easier to use responsive images. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/cms" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/cms"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/cdn" path="https://web.dev/learn/images/cdn" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Image content delivery networks </h2> </div> <div class="devsite-playlist--item-top-controls"> <button class="toggle gc-analytics-event" data-category="devsite-playlist: toggle button"> <i class="material-icons arrow--down" aria-label="Show more details.">keyboard_arrow_down</i> <i class="material-icons arrow--up" aria-label="Show fewer details.">keyboard_arrow_up</i> </button> </div> </div> <div class="devsite-playlist--item--meta"> <i class="material-icons" aria-hidden="true">subject</i> Article </div> <div class="devsite-playlist--item--content"> <p> Learn how image CDNs have the ability to transform and optimize the contents of an image. </p> </div> <div class="devsite-playlist--item--actions"> <a href="https://web.dev/learn/images/cdn" target="_blank" class="button button-primary button-returnto playlist-article gc-analytics-event" data-category="devsite-playlist: read article button" data-label="path: https://web.dev/learn/images/cdn"> Read article </a> </div> </div> </div> <div class="devsite-playlist--section" type="article" id="article-https://web.dev/learn/images/conclusion" path="https://web.dev/learn/images/conclusion" > <div class="devsite-playlist--inner"> <div class="devsite-playlist--item-top"> <div class="devsite-playlist--item-top-index"> <span class="num"></span> <i class="material-icons" aria-hidden="true">check_circle</i> <devsite-spinner size="30" single-color="#aecbfa"></devsite-spinner> </div> <div class="devsite-playlist--item-top-title"> <h2> Conclusion </h2> 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