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<title>learning-area/social.html at master · roy-tian/learning-area</title>
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<svg height="16" width="16" class="octicon octicon-project flex-shrink-0 js-jump-to-octicon-project d-none" title="Project" aria-label="Project" viewBox="0 0 16 16" version="1.1" role="img"><path fill-rule="evenodd" d="M1.75 0A1.75 1.75 0 000 1.75v12.5C0 15.216.784 16 1.75 16h12.5A1.75 1.75 0 0016 14.25V1.75A1.75 1.75 0 0014.25 0H1.75zM1.5 1.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25H1.75a.25.25 0 01-.25-.25V1.75zM11.75 3a.75.75 0 00-.75.75v7.5a.75.75 0 001.5 0v-7.5a.75.75 0 00-.75-.75zm-8.25.75a.75.75 0 011.5 0v5.5a.75.75 0 01-1.5 0v-5.5zM8 3a.75.75 0 00-.75.75v3.5a.75.75 0 001.5 0v-3.5A.75.75 0 008 3z"></path></svg>
<svg height="16" width="16" class="octicon octicon-search flex-shrink-0 js-jump-to-octicon-search d-none" title="Search" aria-label="Search" viewBox="0 0 16 16" version="1.1" role="img"><path fill-rule="evenodd" d="M11.5 7a4.499 4.499 0 11-8.998 0A4.499 4.499 0 0111.5 7zm-.82 4.74a6 6 0 111.06-1.06l3.04 3.04a.75.75 0 11-1.06 1.06l-3.04-3.04z"></path></svg>
</div>
<img class="avatar mr-2 flex-shrink-0 js-jump-to-suggestion-avatar d-none" alt="" aria-label="Team" src="" width="28" height="28">
<div class="jump-to-suggestion-name js-jump-to-suggestion-name flex-auto overflow-hidden text-left no-wrap css-truncate css-truncate-target">
</div>
<div class="border rounded-1 flex-shrink-0 bg-gray px-1 text-gray-light ml-1 f6 d-none js-jump-to-badge-search">
<span class="js-jump-to-badge-search-text-default d-none" aria-label="in this user">
In this user
</span>
<span class="js-jump-to-badge-search-text-global d-none" aria-label="in all of GitHub">
All GitHub
</span>
<span aria-hidden="true" class="d-inline-block ml-1 v-align-middle">↵</span>
</div>
<div aria-hidden="true" class="border rounded-1 flex-shrink-0 bg-gray px-1 text-gray-light ml-1 f6 d-none d-on-nav-focus js-jump-to-badge-jump">
Jump to
<span class="d-inline-block ml-1 v-align-middle">↵</span>
</div>
</a>
</li>
<li class="d-flex flex-justify-start flex-items-center p-0 f5 navigation-item js-navigation-item js-jump-to-global-search d-none" role="option">
<a tabindex="-1" class="no-underline d-flex flex-auto flex-items-center jump-to-suggestions-path js-jump-to-suggestion-path js-navigation-open p-2" href="" data-item-type="global_search">
<div class="jump-to-octicon js-jump-to-octicon flex-shrink-0 mr-2 text-center d-none">
<svg height="16" width="16" class="octicon octicon-repo flex-shrink-0 js-jump-to-octicon-repo d-none" title="Repository" aria-label="Repository" viewBox="0 0 16 16" version="1.1" role="img"><path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path></svg>
<svg height="16" width="16" class="octicon octicon-project flex-shrink-0 js-jump-to-octicon-project d-none" title="Project" aria-label="Project" viewBox="0 0 16 16" version="1.1" role="img"><path fill-rule="evenodd" d="M1.75 0A1.75 1.75 0 000 1.75v12.5C0 15.216.784 16 1.75 16h12.5A1.75 1.75 0 0016 14.25V1.75A1.75 1.75 0 0014.25 0H1.75zM1.5 1.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25H1.75a.25.25 0 01-.25-.25V1.75zM11.75 3a.75.75 0 00-.75.75v7.5a.75.75 0 001.5 0v-7.5a.75.75 0 00-.75-.75zm-8.25.75a.75.75 0 011.5 0v5.5a.75.75 0 01-1.5 0v-5.5zM8 3a.75.75 0 00-.75.75v3.5a.75.75 0 001.5 0v-3.5A.75.75 0 008 3z"></path></svg>
<svg height="16" width="16" class="octicon octicon-search flex-shrink-0 js-jump-to-octicon-search d-none" title="Search" aria-label="Search" viewBox="0 0 16 16" version="1.1" role="img"><path fill-rule="evenodd" d="M11.5 7a4.499 4.499 0 11-8.998 0A4.499 4.499 0 0111.5 7zm-.82 4.74a6 6 0 111.06-1.06l3.04 3.04a.75.75 0 11-1.06 1.06l-3.04-3.04z"></path></svg>
</div>
<img class="avatar mr-2 flex-shrink-0 js-jump-to-suggestion-avatar d-none" alt="" aria-label="Team" src="" width="28" height="28">
<div class="jump-to-suggestion-name js-jump-to-suggestion-name flex-auto overflow-hidden text-left no-wrap css-truncate css-truncate-target">
</div>
<div class="border rounded-1 flex-shrink-0 bg-gray px-1 text-gray-light ml-1 f6 d-none js-jump-to-badge-search">
<span class="js-jump-to-badge-search-text-default d-none" aria-label="in this repository">
In this repository
</span>
<span class="js-jump-to-badge-search-text-global d-none" aria-label="in all of GitHub">
All GitHub
</span>
<span aria-hidden="true" class="d-inline-block ml-1 v-align-middle">↵</span>
</div>
<div aria-hidden="true" class="border rounded-1 flex-shrink-0 bg-gray px-1 text-gray-light ml-1 f6 d-none d-on-nav-focus js-jump-to-badge-jump">
Jump to
<span class="d-inline-block ml-1 v-align-middle">↵</span>
</div>
</a>
</li>
<li class="d-flex flex-justify-center flex-items-center p-0 f5 js-jump-to-suggestion">
<svg style="box-sizing: content-box; color: var(--color-icon-primary);" viewBox="0 0 16 16" fill="none" width="32" height="32" class="m-3">
<circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" />
<path d="M15 8a7.002 7.002 0 00-7-7" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke">
<animateTransform attributeName="transform" type="rotate" from="0 8 8" to="360 8 8" dur="1s" repeatCount="indefinite" />
</path>
</svg>
</li>
</ul>
</div>
</label>
</form> </div>
</div>
<nav class="d-flex flex-column flex-md-row flex-self-stretch flex-md-self-auto" aria-label="Global">
<a class="Header-link py-md-3 d-block d-md-none py-2 border-top border-md-top-0 border-white-fade-15" data-ga-click="Header, click, Nav menu - item:dashboard:user" aria-label="Dashboard" href="/dashboard">
Dashboard
</a>
<a class="js-selected-navigation-item Header-link mt-md-n3 mb-md-n3 py-2 py-md-3 mr-0 mr-md-3 border-top border-md-top-0 border-white-fade-15" data-hotkey="g p" data-ga-click="Header, click, Nav menu - item:pulls context:user" aria-label="Pull requests you created" data-selected-links="/pulls /pulls/assigned /pulls/mentioned /pulls" href="/pulls">
Pull<span class="d-inline d-md-none d-lg-inline"> request</span>s
</a>
<a class="js-selected-navigation-item Header-link mt-md-n3 mb-md-n3 py-2 py-md-3 mr-0 mr-md-3 border-top border-md-top-0 border-white-fade-15" data-hotkey="g i" data-ga-click="Header, click, Nav menu - item:issues context:user" aria-label="Issues you created" data-selected-links="/issues /issues/assigned /issues/mentioned /issues" href="/issues">
Issues
</a>
<div class="d-flex position-relative">
<a class="js-selected-navigation-item Header-link flex-auto mt-md-n3 mb-md-n3 py-2 py-md-3 mr-0 mr-md-3 border-top border-md-top-0 border-white-fade-15" data-ga-click="Header, click, Nav menu - item:marketplace context:user" data-octo-click="marketplace_click" data-octo-dimensions="location:nav_bar" data-selected-links=" /marketplace" href="/marketplace">
Marketplace
</a> </div>
<a class="js-selected-navigation-item Header-link mt-md-n3 mb-md-n3 py-2 py-md-3 mr-0 mr-md-3 border-top border-md-top-0 border-white-fade-15" data-ga-click="Header, click, Nav menu - item:explore" data-selected-links="/explore /trending /trending/developers /integrations /integrations/feature/code /integrations/feature/collaborate /integrations/feature/ship showcases showcases_search showcases_landing /explore" href="/explore">
Explore
</a>
<a class="Header-link d-block d-md-none mr-0 mr-md-3 py-2 py-md-3 border-top border-md-top-0 border-white-fade-15" href="/settings/profile">
Settings
</a>
<a class="Header-link d-block d-md-none mr-0 mr-md-3 py-2 py-md-3 border-top border-md-top-0 border-white-fade-15" href="/Chen1996-1">
<img class="avatar avatar-user" src="https://avatars.githubusercontent.com/u/34327966?s=40&v=4" width="20" height="20" alt="@Chen1996-1" />
Chen1996-1
</a>
<!-- '"` --><!-- </textarea></xmp> --></option></form><form action="/logout" accept-charset="UTF-8" method="post"><input type="hidden" name="authenticity_token" value="DgBUBhepGBal98SE7Cbf5UCWc9/rm/3QOrvWLtnHVm7dnO5eEQrKPlWynLJyrKwmpR2V7tt3ruGBBKpIXOHYTw==" />
<button type="submit" class="Header-link mr-0 mr-md-3 py-2 py-md-3 border-top border-md-top-0 border-white-fade-15 d-md-none btn-link d-block width-full text-left" data-ga-click="Header, sign out, icon:logout" style="padding-left: 2px;">
<svg class="octicon octicon-sign-out v-align-middle" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M2 2.75C2 1.784 2.784 1 3.75 1h2.5a.75.75 0 010 1.5h-2.5a.25.25 0 00-.25.25v10.5c0 .138.112.25.25.25h2.5a.75.75 0 010 1.5h-2.5A1.75 1.75 0 012 13.25V2.75zm10.44 4.5H6.75a.75.75 0 000 1.5h5.69l-1.97 1.97a.75.75 0 101.06 1.06l3.25-3.25a.75.75 0 000-1.06l-3.25-3.25a.75.75 0 10-1.06 1.06l1.97 1.97z"></path></svg>
Sign out
</button>
</form></nav>
</div>
<div class="Header-item Header-item--full flex-justify-center d-md-none position-relative">
<a class="Header-link " href="https://github.com/" data-hotkey="g d"
aria-label="Homepage " data-ga-click="Header, go to dashboard, icon:logo">
<svg class="octicon octicon-mark-github v-align-middle" height="32" viewBox="0 0 16 16" version="1.1" width="32" aria-hidden="true"><path fill-rule="evenodd" d="M8 0C3.58 0 0 3.58 0 8c0 3.54 2.29 6.53 5.47 7.59.4.07.55-.17.55-.38 0-.19-.01-.82-.01-1.49-2.01.37-2.53-.49-2.69-.94-.09-.23-.48-.94-.82-1.13-.28-.15-.68-.52-.01-.53.63-.01 1.08.58 1.23.82.72 1.21 1.87.87 2.33.66.07-.52.28-.87.51-1.07-1.78-.2-3.64-.89-3.64-3.95 0-.87.31-1.59.82-2.15-.08-.2-.36-1.02.08-2.12 0 0 .67-.21 2.2.82.64-.18 1.32-.27 2-.27.68 0 1.36.09 2 .27 1.53-1.04 2.2-.82 2.2-.82.44 1.1.16 1.92.08 2.12.51.56.82 1.27.82 2.15 0 3.07-1.87 3.75-3.65 3.95.29.25.54.73.54 1.48 0 1.07-.01 1.93-.01 2.2 0 .21.15.46.55.38A8.013 8.013 0 0016 8c0-4.42-3.58-8-8-8z"></path></svg>
</a>
</div>
<div class="Header-item mr-0 mr-md-3 flex-order-1 flex-md-order-none">
<notification-indicator class="js-socket-channel" data-channel="eyJjIjoibm90aWZpY2F0aW9uLWNoYW5nZWQ6MzQzMjc5NjYiLCJ0IjoxNjE0MDAyMjYxfQ==--58b607b6a7c0150cf1a99ea07e7f330abf71cdcde42a7282776f59d788795dc0">
<a href="/notifications"
class="Header-link notification-indicator position-relative tooltipped tooltipped-sw"
aria-label="You have no unread notifications"
data-hotkey="g n"
data-ga-click="Header, go to notifications, icon:read"
data-target="notification-indicator.link">
<span class="mail-status " data-target="notification-indicator.modifier"></span>
<svg class="octicon octicon-bell" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path d="M8 16a2 2 0 001.985-1.75c.017-.137-.097-.25-.235-.25h-3.5c-.138 0-.252.113-.235.25A2 2 0 008 16z"></path><path fill-rule="evenodd" d="M8 1.5A3.5 3.5 0 004.5 5v2.947c0 .346-.102.683-.294.97l-1.703 2.556a.018.018 0 00-.003.01l.001.006c0 .002.002.004.004.006a.017.017 0 00.006.004l.007.001h10.964l.007-.001a.016.016 0 00.006-.004.016.016 0 00.004-.006l.001-.007a.017.017 0 00-.003-.01l-1.703-2.554a1.75 1.75 0 01-.294-.97V5A3.5 3.5 0 008 1.5zM3 5a5 5 0 0110 0v2.947c0 .05.015.098.042.139l1.703 2.555A1.518 1.518 0 0113.482 13H2.518a1.518 1.518 0 01-1.263-2.36l1.703-2.554A.25.25 0 003 7.947V5z"></path></svg>
</a>
</notification-indicator>
</div>
<div class="Header-item position-relative d-none d-md-flex">
<details class="details-overlay details-reset">
<summary class="Header-link"
aria-label="Create new…"
data-ga-click="Header, create new, icon:add">
<svg class="octicon octicon-plus" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.75 2a.75.75 0 01.75.75V7h4.25a.75.75 0 110 1.5H8.5v4.25a.75.75 0 11-1.5 0V8.5H2.75a.75.75 0 010-1.5H7V2.75A.75.75 0 017.75 2z"></path></svg> <span class="dropdown-caret"></span>
</summary>
<details-menu class="dropdown-menu dropdown-menu-sw">
<a role="menuitem" class="dropdown-item" href="/new" data-ga-click="Header, create new repository">
New repository
</a>
<a role="menuitem" class="dropdown-item" href="/new/import" data-ga-click="Header, import a repository">
Import repository
</a>
<a role="menuitem" class="dropdown-item" href="https://gist.github.com/" data-ga-click="Header, create new gist">
New gist
</a>
<a role="menuitem" class="dropdown-item" href="/organizations/new" data-ga-click="Header, create new organization">
New organization
</a>
<div role="none" class="dropdown-divider"></div>
<div class="dropdown-header">
<span title="roy-tian/learning-area">This repository</span>
</div>
<a role="menuitem" class="dropdown-item" href="/roy-tian/learning-area/issues/new/choose" data-ga-click="Header, create new issue" data-skip-pjax>
New issue
</a>
</details-menu>
</details>
</div>
<div class="Header-item position-relative mr-0 d-none d-md-flex">
<details class="details-overlay details-reset js-feature-preview-indicator-container" data-feature-preview-indicator-src="/users/Chen1996-1/feature_preview/indicator_check">
<summary class="Header-link"
aria-label="View profile and more"
data-ga-click="Header, show menu, icon:avatar">
<img src="https://avatars.githubusercontent.com/u/34327966?s=60&v=4" alt="@Chen1996-1" size="20" height="20" width="20" class="avatar-user avatar avatar--small "></img>
<span class="feature-preview-indicator js-feature-preview-indicator" style="top: 1px;" hidden></span>
<span class="dropdown-caret"></span>
</summary>
<details-menu class="dropdown-menu dropdown-menu-sw" style="width: 180px"
src="/users/34327966/menu" preload>
<include-fragment>
<p class="text-center mt-3" data-hide-on-error>
<svg style="box-sizing: content-box; color: var(--color-icon-primary);" viewBox="0 0 16 16" fill="none" width="32" height="32">
<circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" />
<path d="M15 8a7.002 7.002 0 00-7-7" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke">
<animateTransform attributeName="transform" type="rotate" from="0 8 8" to="360 8 8" dur="1s" repeatCount="indefinite" />
</path>
</svg>
</p>
<p class="ml-1 mb-2 mt-2 text-gray-dark" data-show-on-error>
<svg class="octicon octicon-alert" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M8.22 1.754a.25.25 0 00-.44 0L1.698 13.132a.25.25 0 00.22.368h12.164a.25.25 0 00.22-.368L8.22 1.754zm-1.763-.707c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0114.082 15H1.918a1.75 1.75 0 01-1.543-2.575L6.457 1.047zM9 11a1 1 0 11-2 0 1 1 0 012 0zm-.25-5.25a.75.75 0 00-1.5 0v2.5a.75.75 0 001.5 0v-2.5z"></path></svg>
Sorry, something went wrong.
</p>
</include-fragment>
</details-menu>
</details>
</div>
</header>
</div>
<div id="start-of-content" class="show-on-focus"></div>
<div data-pjax-replace id="js-flash-container">
<template class="js-flash-template">
<div class="flash flash-full {{ className }}">
<div class=" px-2" >
<button class="flash-close js-flash-close" type="button" aria-label="Dismiss this message">
<svg class="octicon octicon-x" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path></svg>
</button>
<div>{{ message }}</div>
</div>
</div>
</template>
</div>
<include-fragment class="js-notification-shelf-include-fragment" data-base-src="https://github.com/notifications/beta/shelf"></include-fragment>
<div
class="application-main "
data-commit-hovercards-enabled
data-discussion-hovercards-enabled
data-issue-and-pr-hovercards-enabled
>
<div itemscope itemtype="http://schema.org/SoftwareSourceCode" class="">
<main id="js-repo-pjax-container" data-pjax-container >
<div class="bg-gray-light pt-3 hide-full-screen mb-5">
<div class="d-flex mb-3 px-3 px-md-4 px-lg-5">
<div class="flex-auto min-width-0 width-fit mr-3">
<h1 class=" d-flex flex-wrap flex-items-center break-word f3 text-normal">
<svg class="octicon octicon-repo text-gray mr-2" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path></svg>
<span class="author flex-self-stretch" itemprop="author">
<a class="url fn" rel="author" data-hovercard-type="user" data-hovercard-url="/users/roy-tian/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/roy-tian">roy-tian</a>
</span>
<span class="mx-1 flex-self-stretch color-text-secondary">/</span>
<strong itemprop="name" class="mr-2 flex-self-stretch">
<a data-pjax="#js-repo-pjax-container" class="" href="/roy-tian/learning-area">learning-area</a>
</strong>
</h1>
</div>
<ul class="pagehead-actions flex-shrink-0 d-none d-md-inline" style="padding: 2px 0;">
<li>
<notifications-list-subscription-form class="f5 position-relative d-flex">
<details
class="details-reset details-overlay f5 position-relative"
data-target="notifications-list-subscription-form.details"
data-action="toggle:notifications-list-subscription-form#detailsToggled"
>
<summary class="btn btn-sm rounded-right-0" data-hydro-click="{"event_type":"repository.click","payload":{"target":"WATCH_BUTTON","repository_id":152932235,"originating_url":"https://github.com/roy-tian/learning-area/blob/master/html/introduction-to-html/navigation-menu-start/social.html","user_id":34327966}}" data-hydro-click-hmac="c635b517b067f6a3f4b6008ca597185a2cfee9681050bbd89fd7177cb654f1d3" data-ga-click="Repository, click Watch settings, action:blob#show" aria-label="Notifications settings">
<span data-menu-button>
<span
hidden
data-target="notifications-list-subscription-form.unwatchButtonCopy"
>
<svg class="octicon octicon-eye" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M1.679 7.932c.412-.621 1.242-1.75 2.366-2.717C5.175 4.242 6.527 3.5 8 3.5c1.473 0 2.824.742 3.955 1.715 1.124.967 1.954 2.096 2.366 2.717a.119.119 0 010 .136c-.412.621-1.242 1.75-2.366 2.717C10.825 11.758 9.473 12.5 8 12.5c-1.473 0-2.824-.742-3.955-1.715C2.92 9.818 2.09 8.69 1.679 8.068a.119.119 0 010-.136zM8 2c-1.981 0-3.67.992-4.933 2.078C1.797 5.169.88 6.423.43 7.1a1.619 1.619 0 000 1.798c.45.678 1.367 1.932 2.637 3.024C4.329 13.008 6.019 14 8 14c1.981 0 3.67-.992 4.933-2.078 1.27-1.091 2.187-2.345 2.637-3.023a1.619 1.619 0 000-1.798c-.45-.678-1.367-1.932-2.637-3.023C11.671 2.992 9.981 2 8 2zm0 8a2 2 0 100-4 2 2 0 000 4z"></path></svg>
Unwatch
</span>
<span
hidden
data-target="notifications-list-subscription-form.stopIgnoringButtonCopy"
>
<svg class="octicon octicon-bell-slash" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M8 1.5c-.997 0-1.895.416-2.534 1.086A.75.75 0 014.38 1.55 5 5 0 0113 5v2.373a.75.75 0 01-1.5 0V5A3.5 3.5 0 008 1.5zM4.182 4.31L1.19 2.143a.75.75 0 10-.88 1.214L3 5.305v2.642a.25.25 0 01-.042.139L1.255 10.64A1.518 1.518 0 002.518 13h11.108l1.184.857a.75.75 0 10.88-1.214l-1.375-.996a1.196 1.196 0 00-.013-.01L4.198 4.321a.733.733 0 00-.016-.011zm7.373 7.19L4.5 6.391v1.556c0 .346-.102.683-.294.97l-1.703 2.556a.018.018 0 00-.003.01.015.015 0 00.005.012.017.017 0 00.006.004l.007.001h9.037zM8 16a2 2 0 001.985-1.75c.017-.137-.097-.25-.235-.25h-3.5c-.138 0-.252.113-.235.25A2 2 0 008 16z"></path></svg>
Stop ignoring
</span>
<span
data-target="notifications-list-subscription-form.watchButtonCopy"
>
<svg class="octicon octicon-eye" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M1.679 7.932c.412-.621 1.242-1.75 2.366-2.717C5.175 4.242 6.527 3.5 8 3.5c1.473 0 2.824.742 3.955 1.715 1.124.967 1.954 2.096 2.366 2.717a.119.119 0 010 .136c-.412.621-1.242 1.75-2.366 2.717C10.825 11.758 9.473 12.5 8 12.5c-1.473 0-2.824-.742-3.955-1.715C2.92 9.818 2.09 8.69 1.679 8.068a.119.119 0 010-.136zM8 2c-1.981 0-3.67.992-4.933 2.078C1.797 5.169.88 6.423.43 7.1a1.619 1.619 0 000 1.798c.45.678 1.367 1.932 2.637 3.024C4.329 13.008 6.019 14 8 14c1.981 0 3.67-.992 4.933-2.078 1.27-1.091 2.187-2.345 2.637-3.023a1.619 1.619 0 000-1.798c-.45-.678-1.367-1.932-2.637-3.023C11.671 2.992 9.981 2 8 2zm0 8a2 2 0 100-4 2 2 0 000 4z"></path></svg>
Watch
</span>
</span>
<span class="dropdown-caret"></span>
</summary>
<details-menu
class="SelectMenu "
role="menu"
data-target="notifications-list-subscription-form.menu"
>
<div class="SelectMenu-modal notifications-component-menu-modal">
<header class="SelectMenu-header">
<h3 class="SelectMenu-title">Notifications</h3>
<button class="SelectMenu-closeButton" type="button" aria-label="Close menu" data-action="click:notifications-list-subscription-form#closeMenu">
<svg class="octicon octicon-x" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path></svg>
</button>
</header>
<div class="SelectMenu-list">
<form data-target="notifications-list-subscription-form.form" data-action="submit:notifications-list-subscription-form#submitForm" action="/notifications/subscribe" accept-charset="UTF-8" method="post"><input type="hidden" name="authenticity_token" value="+xMuix2olD/dnBTieO2k4uGzzv/NIh/w9NVDBkai/iQHPy0Xot/F44IZm72v6+4nj0vknHJiAW20cvu2EFQJPA==" />
<input type="hidden" name="repository_id" value="152932235">
<button
type="submit"
name="do"
value="included"
class="SelectMenu-item flex-items-start"
role="menuitemradio"
aria-checked="true"
data-targets="notifications-list-subscription-form.subscriptionButtons"
>
<span class="f5">
<svg class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path></svg>
</span>
<div>
<div class="f5 text-bold">
Participating and @mentions
</div>
<div class="text-small text-gray text-normal pb-1">
Only receive notifications from this repository when participating or @mentioned.
</div>
</div>
</button>
<button
type="submit"
name="do"
value="subscribed"
class="SelectMenu-item flex-items-start"
role="menuitemradio"
aria-checked="false"
data-targets="notifications-list-subscription-form.subscriptionButtons"
>
<span class="f5">
<svg class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path></svg>
</span>
<div>
<div class="f5 text-bold">
All Activity
</div>
<div class="text-small text-gray text-normal pb-1">
Notified of all notifications on this repository.
</div>
</div>
</button>
<button
type="submit"
name="do"
value="ignore"
class="SelectMenu-item flex-items-start"
role="menuitemradio"
aria-checked="false"
data-targets="notifications-list-subscription-form.subscriptionButtons"
>
<span class="f5">
<svg class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path></svg>
</span>
<div>
<div class="f5 text-bold">
Ignore
</div>
<div class="text-small text-gray text-normal pb-1">
Never be notified.
</div>
</div>
</button>
</form>
<button
class="SelectMenu-item flex-items-start pr-3"
type="button"
role="menuitemradio"
data-target="notifications-list-subscription-form.customButton"
data-action="click:notifications-list-subscription-form#openCustomDialog"
aria-haspopup="true"
aria-checked="false"
>
<span class="f5">
<svg class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path></svg>
</span>
<div>
<div class="d-flex flex-items-start flex-justify-between">
<div class="f5 text-bold">Custom</div>
<div class="f5 pr-1">
<svg class="octicon octicon-arrow-right" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M8.22 2.97a.75.75 0 011.06 0l4.25 4.25a.75.75 0 010 1.06l-4.25 4.25a.75.75 0 01-1.06-1.06l2.97-2.97H3.75a.75.75 0 010-1.5h7.44L8.22 4.03a.75.75 0 010-1.06z"></path></svg>
</div>
</div>
<div class="text-small text-gray text-normal pb-1">
Select events you want to be notified of in addition to participating and @mentions.
</div>
</div>
</button>
</div>
</div>
</details-menu>
<details-dialog class="notifications-component-dialog " data-target="notifications-list-subscription-form.customDialog" hidden>
<div class="SelectMenu-modal notifications-component-dialog-modal overflow-visible">
<form data-target="notifications-list-subscription-form.customform" data-action="submit:notifications-list-subscription-form#submitCustomForm" action="/notifications/subscribe" accept-charset="UTF-8" method="post"><input type="hidden" name="authenticity_token" value="gixkIa4gIktLuQbQ+l2u6yJ9pkDCet6qZtNU3BOqDyZ+AGe9EVdzlxQ8iY8tW+QuTIWMI306wDcmdOxsRVz4Pg==" />
<input type="hidden" name="repository_id" value="152932235">
<header class="d-sm-none SelectMenu-header pb-0 border-bottom-0 px-2 px-sm-3">
<h1 class="f3 SelectMenu-title d-inline-flex">
<button
class="bg-white border-0 px-2 py-0 m-0 link-gray f5"
aria-label="Return to menu"
type="button"
data-action="click:notifications-list-subscription-form#closeCustomDialog"
>
<svg style="" class="octicon octicon-arrow-left" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.78 12.53a.75.75 0 01-1.06 0L2.47 8.28a.75.75 0 010-1.06l4.25-4.25a.75.75 0 011.06 1.06L4.81 7h7.44a.75.75 0 010 1.5H4.81l2.97 2.97a.75.75 0 010 1.06z"></path></svg>
</button>
Custom
</h3>
</header>
<header class="d-none d-sm-flex flex-items-start pt-1">
<button
class="border-0 px-2 pt-1 m-0 link-gray f5"
style="background-color: transparent;"
aria-label="Return to menu"
type="button"
data-action="click:notifications-list-subscription-form#closeCustomDialog"
>
<svg style="position: relative; left: 2px; top: 1px" class="octicon octicon-arrow-left" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.78 12.53a.75.75 0 01-1.06 0L2.47 8.28a.75.75 0 010-1.06l4.25-4.25a.75.75 0 011.06 1.06L4.81 7h7.44a.75.75 0 010 1.5H4.81l2.97 2.97a.75.75 0 010 1.06z"></path></svg>
</button>
<h1 class="pt-1 pr-4 pb-0 pl-0 f5 text-bold">
Custom
</h1>
</header>
<fieldset>
<legend>
<div class="text-small text-gray pt-0 pr-3 pb-3 pl-6 pl-sm-5 border-bottom mb-3">
Select events you want to be notified of in addition to participating and @mentions.
</div>
</legend>
<div class="form-checkbox mr-3 ml-6 ml-sm-5 mb-2 mt-0">
<label class="f5 text-normal">
<input
type="checkbox"
name="thread_types[]"
value="Issue"
data-targets="notifications-list-subscription-form.threadTypeCheckboxes"
data-action="change:notifications-list-subscription-form#threadTypeCheckboxesUpdated"
>
Issues
</label>
</div>
<div class="form-checkbox mr-3 ml-6 ml-sm-5 mb-2 mt-0">
<label class="f5 text-normal">
<input
type="checkbox"
name="thread_types[]"
value="PullRequest"
data-targets="notifications-list-subscription-form.threadTypeCheckboxes"
data-action="change:notifications-list-subscription-form#threadTypeCheckboxesUpdated"
>
Pull requests
</label>
</div>
<div class="form-checkbox mr-3 ml-6 ml-sm-5 mb-2 mt-0">
<label class="f5 text-normal">
<input
type="checkbox"
name="thread_types[]"
value="Release"
data-targets="notifications-list-subscription-form.threadTypeCheckboxes"
data-action="change:notifications-list-subscription-form#threadTypeCheckboxesUpdated"
>
Releases
</label>
</div>
<div class="form-checkbox mr-3 ml-6 ml-sm-5 mb-2 mt-0">
<label class="f5 text-normal">
<input
type="checkbox"
name="thread_types[]"
value="Discussion"
data-targets="notifications-list-subscription-form.threadTypeCheckboxes"
data-action="change:notifications-list-subscription-form#threadTypeCheckboxesUpdated"
>
Discussions
</label>
<span
class="tooltipped tooltipped-nw mr-2 p-1 float-right"
aria-label="Discussions are not enabled for this repo">
<svg style="fill: var(--color-icon-tertiary)" class="octicon octicon-info" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M8 1.5a6.5 6.5 0 100 13 6.5 6.5 0 000-13zM0 8a8 8 0 1116 0A8 8 0 010 8zm6.5-.25A.75.75 0 017.25 7h1a.75.75 0 01.75.75v2.75h.25a.75.75 0 010 1.5h-2a.75.75 0 010-1.5h.25v-2h-.25a.75.75 0 01-.75-.75zM8 6a1 1 0 100-2 1 1 0 000 2z"></path></svg>
</span>
</div>
</fieldset>
<div class="pt-2 pb-3 px-3 d-flex flex-justify-start flex-row-reverse">
<button
type="submit"
name="do"
value="custom"
class="btn btn-sm btn-primary ml-2"
data-target="notifications-list-subscription-form.customSubmit"
disabled
>Apply</button>
<button
class="btn btn-sm"
type="button"
data-action="click:notifications-list-subscription-form#resetForm"
data-close-dialog="">Cancel</button>
</div>
</form> </div>
</details-dialog>
<div class="notifications-component-dialog-overlay"></div>
</details>
<a class="social-count"
href="/roy-tian/learning-area/watchers"
aria-label="14 users are watching this repository"
data-target="notifications-list-subscription-form.socialCount"
>
14
</a>
</notifications-list-subscription-form>
</li>
<li>
<div class="d-block js-toggler-container js-social-container starring-container ">
<form class="starred js-social-form" action="/roy-tian/learning-area/unstar" accept-charset="UTF-8" method="post"><input type="hidden" name="authenticity_token" value="j/e50bXx8q1cksVN7MoBs0GKstXHJiPC/gVePAthj3OP3T1ZGpC33X3/VYm5BQko+p/yzUSJiz9WO4QhKkO/1g==" />
<input type="hidden" name="context" value="repository">
<button type="submit" class="btn btn-sm btn-with-count js-toggler-target" aria-label="Unstar this repository" title="Unstar roy-tian/learning-area" data-hydro-click="{"event_type":"repository.click","payload":{"target":"UNSTAR_BUTTON","repository_id":152932235,"originating_url":"https://github.com/roy-tian/learning-area/blob/master/html/introduction-to-html/navigation-menu-start/social.html","user_id":34327966}}" data-hydro-click-hmac="c205dcd6b4676890476d6e4429bb6d047c07bddd6b1d850ca955e2eb0d406b83" data-ga-click="Repository, click unstar button, action:blob#show; text:Unstar"> <svg class="octicon octicon-star-fill mr-1" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25z"></path></svg>
<span>
Unstar
</span></button> <a class="social-count js-social-count" href="/roy-tian/learning-area/stargazers"
aria-label="346 users starred this repository">
346
</a>
</form>
<form class="unstarred js-social-form" action="/roy-tian/learning-area/star" accept-charset="UTF-8" method="post"><input type="hidden" name="authenticity_token" value="kH7M4zBGRhC7J03jjtYDQmIRKcIKi+tEhxN2XWgI+nuZjc5agGF4sfi8eiTQ8VYm281UK4ULUcH7u7AVaUiU1Q==" />
<input type="hidden" name="context" value="repository">
<button type="submit" class="btn btn-sm btn-with-count js-toggler-target" aria-label="Unstar this repository" title="Star roy-tian/learning-area" data-hydro-click="{"event_type":"repository.click","payload":{"target":"STAR_BUTTON","repository_id":152932235,"originating_url":"https://github.com/roy-tian/learning-area/blob/master/html/introduction-to-html/navigation-menu-start/social.html","user_id":34327966}}" data-hydro-click-hmac="58a134d8f808075b78b48212370d6d67c0c56a998da5a5164eb4c370ff4af146" data-ga-click="Repository, click star button, action:blob#show; text:Star"> <svg class="octicon octicon-star mr-1" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25zm0 2.445L6.615 5.5a.75.75 0 01-.564.41l-3.097.45 2.24 2.184a.75.75 0 01.216.664l-.528 3.084 2.769-1.456a.75.75 0 01.698 0l2.77 1.456-.53-3.084a.75.75 0 01.216-.664l2.24-2.183-3.096-.45a.75.75 0 01-.564-.41L8 2.694v.001z"></path></svg>
<span>
Star
</span></button> <a class="social-count js-social-count" href="/roy-tian/learning-area/stargazers"
aria-label="346 users starred this repository">
346
</a>
</form> </div>
</li>
<li>
<div class="float-left">
<details class="details-reset details-overlay details-overlay-dark " >
<summary
class="btn btn-sm btn-with-count"
title="Fork your own copy of roy-tian/learning-area to your account"
data-hydro-click="{"event_type":"repository.click","payload":{"target":"FORK_BUTTON","repository_id":152932235,"originating_url":"https://github.com/roy-tian/learning-area/blob/master/html/introduction-to-html/navigation-menu-start/social.html","user_id":34327966}}" data-hydro-click-hmac="dd123535af57f7016ccb237a06ab0aa9ee3cb2ec6f4692c666848aceebe1fc68" data-ga-click="Repository, show fork modal, action:blob#show; text:Fork">
<svg class="octicon octicon-repo-forked" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M5 3.25a.75.75 0 11-1.5 0 .75.75 0 011.5 0zm0 2.122a2.25 2.25 0 10-1.5 0v.878A2.25 2.25 0 005.75 8.5h1.5v2.128a2.251 2.251 0 101.5 0V8.5h1.5a2.25 2.25 0 002.25-2.25v-.878a2.25 2.25 0 10-1.5 0v.878a.75.75 0 01-.75.75h-4.5A.75.75 0 015 6.25v-.878zm3.75 7.378a.75.75 0 11-1.5 0 .75.75 0 011.5 0zm3-8.75a.75.75 0 100-1.5.75.75 0 000 1.5z"></path></svg>
Fork
</summary>
<details-dialog
class="Box d-flex flex-column anim-fade-in fast Box--overlay "
aria-label="Fork learning-area"
src="/roy-tian/learning-area/fork?fragment=1"
preload
>
<div class="Box-header">
<button class="Box-btn-octicon btn-octicon float-right" type="button" aria-label="Close dialog" data-close-dialog>
<svg class="octicon octicon-x" height="16" viewBox="0 0 16 16" version="1.1" width="16" aria-hidden="true"><path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path></svg>
</button>
<h1 class="Box-title">Fork learning-area</h1>
</div>
<div class="text-center overflow-auto">
<include-fragment>
<div class="octocat-spinner my-5" aria-label="Loading..."></div>
<p class="f5 text-gray">If this dialog fails to load, you can visit <a href="/roy-tian/learning-area/fork">the fork page</a> directly.</p>
</include-fragment>
</div>
</details-dialog>
</details>
</div>
<a href="/roy-tian/learning-area/network/members" class="social-count"
aria-label="743 users forked this repository">
743
</a>
</li>
</ul>
</div>
<nav aria-label="Repository" data-pjax="#js-repo-pjax-container" class="js-repo-nav js-sidenav-container-pjax js-responsive-underlinenav overflow-hidden UnderlineNav px-3 px-md-4 px-lg-5 bg-gray-light">
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