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e=document.querySelector(".page-wrapper");e&&e.classList.remove("page-wrapper_sidebar_on")}setTimeout(function(){document.querySelector(".page").classList.add("page_sidebar-animation-on")});</script><div class="page__inner"><main class="main main_width-limit-wide"><div class="content"><div class="about-layout"><div class="about-layout__project"><h1 class="about-layout__title">このプロジェクトについて</h1><div class="about-layout__text">Javascript.info は、ロシアで最大級のJavaScriptチュートリアルと学習プラットフォームである learn.javascript.ru のフォークとして作成されました。このチュートリアルの内容はオープンソースであり、誰もが貢献できます。</div></div><div class="about-layout__contact"><div class="about-contacts" id="contact-us"><h3 class="about-contacts__block-title">コンタクト</h3><div class="about-contacts__contact"><div class="about-contacts__title">Techlead LLC</div><div class="about-contacts__title">Yerevan, Armenia</div><a class="about-contacts__email" href="mailto:admin@javascript.info">admin@javascript.info</a></div></div></div></div><div class="about-issues"><h2 class="about-issues__title">バグや誤字?</h2><p class="about-issues__text">Webサイトのコンテンツを改善する方法をご存知であれば、<a href="https://github.com/javascript-tutorial/ja.javascript.info" rel="noopener noreferrer" target="_blank">github</a> に記載をお願いします。</p><div class="about-issues__text">私たちはこのオープンソースプロジェクトを世界中の人々に提供したいと考えています。このチュートリアルの内容をあなたが知っている言語に<a href="https://javascript.info/translate#help" rel="noopener noreferrer" target="_blank">翻訳するのを手伝って</a>ください。</div></div><div class="about-team" id="team"><h2 class="about-team__title">チーム</h2><ul class="about-team__list"><li class="about-team__member"><a class="about-team__member-upic" href="https://javascript.info/profile/ilya-kantor"><img class="about-team__member-photo" src="/team/iliakan.jpg" alt="フォト" title=""/></a><div class="about-team__member-info"><a class="about-team__member-name" href="https://javascript.info/profile/ilya-kantor">Ilya Kantor</a><div class="about-team__member-text">設立者, トレーナー, JS-開発者</div></div></li><li class="about-team__member"><a class="about-team__member-upic" href="https://www.linkedin.com/in/amaxcz/"><img class="about-team__member-photo" src="/team/amax.jpg" alt="フォト" title=""/></a><div class="about-team__member-info"><a class="about-team__member-name" href="https://www.linkedin.com/in/amaxcz/">Alexey Maximov</a><div class="about-team__member-text">システム管理者</div></div></li><li class="about-team__member"><a class="about-team__member-upic" href="https://javascript.info/profile/artem-beztsenniy"><img class="about-team__member-photo" src="/team/bezart.jpg" alt="フォト" title=""/></a><div class="about-team__member-info"><a class="about-team__member-name" href="https://javascript.info/profile/artem-beztsenniy">Artem Beztsinniy</a><div class="about-team__member-text">デザイナー</div></div></li><li class="about-team__member"><a class="about-team__member-upic" href="https://javascript.info/profile/sergey-zelenov"><img class="about-team__member-photo" src="/team/sergey.jpg" alt="フォト" title=""/></a><div class="about-team__member-info"><a class="about-team__member-name" href="https://javascript.info/profile/sergey-zelenov">Sergey Zelenov</a><div class="about-team__member-text">JS-開発者, 教師</div></div></li><li class="about-team__member"><a class="about-team__member-upic"><img class="about-team__member-photo" src="/team/kenji.jpg" alt="フォト" title=""/></a><div class="about-team__member-info"><a class="about-team__member-name">Kenji Ishii</a><div class="about-team__member-text">訳者</div></div></li></ul></div><div class="about-maintainers" id="maintainers"><h2 class="about-maintainers__title">Tutorial maintainers</h2><ul class="about-maintainers__list"><li class="about-maintainers__member"><a class="about-maintainers__member-upic" href="https://github.com/KenjiI"><img class="about-maintainers__member-photo" src="https://avatars.githubusercontent.com/u/6941841?v=4" alt="Photo" title=""/></a><div class="about-maintainers__member-info"><a class="about-maintainers__member-name" href="https://github.com/KenjiI">Kenji Ishii</a></div></li></ul><p>The tutorial repository is at <a href="https://github.com/javascript-tutorial/ja.javascript.info">https://github.com/javascript-tutorial/ja.javascript.info</a>.</p></div><div class="about-contributors about-contributors_collapsed about-contributors_contributors" id="contributors"><h2 class="about-contributors__title">Contributors</h2><div class="about-contributors__text"><p>The list below includes all contributors-authors of 10+ lines of the tutorial. The full list of contributors is available <a href="https://github.com/javascript-tutorial/ja.javascript.info/graphs/contributors">here</a>. The tutorial is based on the <a href="https://javascript.info">English version</a>.</p> <p>It's very easy to become listed. Just write an article or propose fixes in the <a href="https://github.com/javascript-tutorial/ja.javascript.info">tutorial repository</a>. And get everyone's thanks.</p> </div><div class="about-contributors__container"><table class="about-contributors__table"><thead><tr><th>Contributor</th><th class="number">Lines</th><th class="number">Percent</th></tr></thead><tbody><tr><td><div class="about-contributors__userpic"><img src="https://avatars1.githubusercontent.com/u/6941841?v=4" width="24" height="24"/> </div><a href="https://github.com/KenjiI">石井賢二</a></td><td class="number">33221</td><td class="number">95.64%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars1.githubusercontent.com/u/14258713?v=4" width="24" height="24"/> </div><a href="https://github.com/morita657">morita657</a></td><td class="number">389</td><td class="number">1.12%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/65007448?v=4" width="24" height="24"/> </div><a href="https://github.com/yasuda0320">yasuda0320</a></td><td class="number">324</td><td class="number">0.93%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/42336339?v=4" width="24" height="24"/> </div><a href="https://github.com/toku-sa-n">Hiroki Tokunaga</a></td><td class="number">187</td><td class="number">0.54%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars2.githubusercontent.com/u/9638156?v=4" width="24" height="24"/> </div><a href="https://github.com/usernamehw">Alexander</a></td><td class="number">100</td><td class="number">0.29%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/131193555?v=4" width="24" height="24"/> </div><a href="https://github.com/pan-no-mimi">pan-no-mimi</a></td><td class="number">77</td><td class="number">0.22%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars3.githubusercontent.com/u/6139686?v=4" width="24" height="24"/> </div><a href="https://github.com/maangie">maangie</a></td><td class="number">43</td><td class="number">0.12%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars0.githubusercontent.com/u/11228161?v=4" width="24" height="24"/> </div><a href="https://github.com/koboriakira">Kobori Akira</a></td><td class="number">38</td><td class="number">0.11%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars0.githubusercontent.com/u/44515132?v=4" width="24" height="24"/> </div><a href="https://github.com/nakaken88">nakaken88</a></td><td class="number">32</td><td class="number">0.09%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/2692787?v=4" width="24" height="24"/> </div><a href="https://github.com/chigix">Richard Lea</a></td><td class="number">28</td><td class="number">0.08%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars2.githubusercontent.com/u/3645127?v=4" width="24" height="24"/> </div><a href="https://github.com/craftone">craftone</a></td><td class="number">24</td><td class="number">0.07%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars0.githubusercontent.com/u/35870680?v=4" width="24" height="24"/> </div><a href="https://github.com/t-gyo">gyo</a></td><td class="number">20</td><td class="number">0.06%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars3.githubusercontent.com/u/48374547?v=4" width="24" height="24"/> </div><a href="https://github.com/yamadataro3">yamadataro3</a></td><td class="number">20</td><td class="number">0.06%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/17381979?v=4" width="24" height="24"/> </div><a href="https://github.com/ktmouk">ktmouk</a></td><td class="number">14</td><td class="number">0.04%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars1.githubusercontent.com/u/43988362?v=4" width="24" height="24"/> </div><a href="https://github.com/koh1project">Koichi</a></td><td class="number">12</td><td class="number">0.03%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/90051826?v=4" width="24" height="24"/> </div><a href="https://github.com/tez3998">Yuta Tezuka</a></td><td class="number">12</td><td class="number">0.03%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars.githubusercontent.com/u/60252468?v=4" width="24" height="24"/> </div><a href="https://github.com/chokkura">chokkura</a></td><td class="number">12</td><td class="number">0.03%</td></tr><tr><td><div class="about-contributors__userpic"><img src="https://avatars3.githubusercontent.com/u/9009605?v=4" width="24" height="24"/> </div><a href="https://github.com/Monota">Monota</a></td><td class="number">11</td><td 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