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fill-opacity=".13"></path></svg><h2 data-v-64098914="" class="f6 mv0 fw2">IPFS</h2></div><div data-v-64098914="" class="flex justify-between flex-row items-start mb1"><div data-v-64098914="" class="flex flex-row items-start mt1"><h1 data-v-64098914="" class="ma0 f3 fw5"> Blogging on the Decentralized Web </h1></div><svg data-v-64098914="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenges" class="h2 ml3 type-icon has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div><p data-v-64098914="" class="f5 fw5 mt2 mb3 lh-copy charcoal-muted"><p>Cool content addresses don't change. Create a chain of links from one CID to another with the IPFS DAG API.</p> </p><ul data-v-64098914="" class="lessons-list mv2 pa0 f5 br3"><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/01" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 1</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">Link an author to a blog post using its CID</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/02" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 2</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">Update posts with tags and watch their CIDs change</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/03" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 3</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">Build a tag cloud with arrays of links</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/04" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 4</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">Add a new blog post linked to an author and tags</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/05" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 5</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">Add a new tag linked to multiple blog posts</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/06" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 6</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">List posts chronologically with a chain of links</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><li data-v-64098914=""><a data-v-62d9e11c="" data-v-64098914="" href="/blog/07" class="link db pa3 green bb b--white" data-cy="lesson-link-standard"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center dn tl green ttu f6" style="min-width: 93px;">Lesson 7</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">Traverse through all posts, starting with the most recent</div></div><svg data-v-62d9e11c="" version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" x="0" y="0" viewBox="0 0 50 50" xml:space="preserve" alt="JavaScript code challenge" class="link-icon ml3 has-tooltip" data-original-title="null"><path fill="currentColor" d="M15.1 36c-.4 0-.8-.1-1.1-.4l-9.5-9.5c-.3-.3-.4-.7-.4-1.1 0-.4.2-.8.4-1.1l9.6-9.6c.6-.6 1.5-.6 2.1 0s.6 1.5 0 2.1L7.6 25l8.4 8.4c.6.6.6 1.5 0 2.1-.2.4-.5.5-.9.5zM34.6 36c-.4 0-.8-.1-1.1-.4-.6-.6-.6-1.5 0-2.1l8.6-8.6-8.4-8.4c-.6-.6-.6-1.5 0-2.1.6-.6 1.5-.6 2.1 0l9.4 9.4c.6.6.6 1.5 0 2.1l-9.6 9.6c-.2.4-.6.5-1 .5zM22.9 38.3h-.2c-.8-.1-1.4-.9-1.2-1.7L25.3 13c.1-.8.9-1.4 1.7-1.2.8.1 1.4.9 1.2 1.7L24.4 37c-.2.8-.8 1.3-1.5 1.3z"></path></svg></div></a></li><a data-v-62d9e11c="" data-v-64098914="" href="/blog/resources" class="link db pa3 green bb b--white" data-cy="lesson-link-resources"><div data-v-62d9e11c="" class="flex items-start justify-between"><div data-v-62d9e11c="" class="flex flex-row"><div data-v-62d9e11c="" class="flex-ns items-center-ns dn tl green ttu f6" style="min-width: 93px;">Resources</div><div data-v-62d9e11c="" class="flex-ns items-center-ns pr3" style="flex-shrink: 0;"><svg data-v-62d9e11c="" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" alt="not yet started" class="" style="height: 0.9rem;"><circle data-v-62d9e11c="" cx="8" cy="8" r="8" fill="#B4C3C4"></circle><path data-v-62d9e11c="" d="M10 8l.707.707a1 1 0 000-1.414L10 8zm-3.707 2.293a1 1 0 101.414 1.414l-1.414-1.414zm1.414-6a1 1 0 00-1.414 1.414l1.414-1.414zm1.586 3l-3 3 1.414 1.414 3-3-1.414-1.414zm-3-1.586l3 3 1.414-1.414-3-3-1.414 1.414z" fill="#fff"></path></svg></div><div data-v-62d9e11c="" class="navy fw5 mw6">More to explore</div></div><svg data-v-62d9e11c="" id="Layer_1" data-name="Layer 1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 50 50" alt="Resource links" class="link-icon ml3 has-tooltip" data-original-title="null"><path d="M39.27 24.52v11a3.78 3.78 0 01-3.79 3.79h-21a3.78 3.78 0 01-3.79-3.79v-21a3.78 3.78 0 013.79-3.79h11M30.68 10.73h7.88a.71.71 0 01.71.71V19M38.56 11.44l-9.41 9.41" fill="none" stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="3px"></path></svg></div></a></ul></div></section><footer data-v-a0fc7dd0="" data-cy="footer-component" class="bg-navy white pt5-m pt5-l pt4 pb2 footer-margin"><div data-v-a0fc7dd0="" class="flex mw7 ph3 center flex-wrap"><div data-v-a0fc7dd0="" class="w-33-l w-100 mb0-l mb3"><a data-v-a0fc7dd0="" href="/" class="flex items-center link router-link-active"><svg data-v-a0fc7dd0="" fill="none" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 116 135" alt="ProtoSchool" class="w2 mr2 "><path data-v-a0fc7dd0="" d="M58.291 0L0 33.518v67.035l58 33.517 58-33.517V33.518L58.291 0zm53.92 44.593l-33.226-27.98 33.518 19.236v8.744h-.292zM13.407 63.246L25.94 28.563l8.16-1.457-20.693 36.14zm23.025-34.1h43.719l21.859 37.89-21.86 37.889H36.433l-21.86-37.89 21.86-37.89zM11.658 67.909l20.694 36.141L8.744 75.779l2.914-7.87zm65.578 39.93l-36.14 6.412-5.247-6.412h41.387zm25.94-37.015l-12.533 34.684-8.16 1.457 20.693-36.14zm1.749-4.663L83.94 30.02l23.608 28.27-2.623 7.87zm-65.87-39.93l36.141-6.412 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