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- hiruberuto / 2016-02-12: 2019-04-13: リアクティブプログラミングとは何だったのか
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Followbox with Pure JS
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset='utf-8'> | |
| <meta http-equiv='X-UA-Compatible' content='IE=edge'> | |
| <title>Followbox</title> | |
| <meta name='viewport' content='width=device-width, initial-scale=1'> | |
| <link rel='stylesheet' type='text/css' media='screen' href='main.css'> | |
| <script src='main.js'></script> | |
| </head> | |
| <body> | |
| <h1>Followbox</h1> | |
| <div class="followbox"> | |
| <div class="header"> | |
| <h2>Who to follow</h2><a href="#" class="refresh">Refresh</a> | |
| </div> | |
| <ul class="suggestions"> | |
| <li class="suggestion"> | |
| <img /> | |
| <a href="#" target="_blank" class="username">blank</a> | |
| <a href="#" class="close">x</a> | |
| </li> | |
| <li class="suggestion"> | |
| <img /> | |
| <a href="#" target="_blank" class="username">blank</a> | |
| <a href="#" class="close">x</a> | |
| </li> | |
| <li class="suggestion"> | |
| <img /> | |
| <a href="#" target="_blank" class="username">blank</a> | |
| <a href="#" class="close">x</a> | |
| </li> | |
| </ul> | |
| </div> | |
| </body> | |
| </html> |
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| .followbox .header * { | |
| display: inline-block; | |
| padding: 0; | |
| margin: 4px; | |
| } | |
| .followbox .header { | |
| background: #ECECEC; | |
| margin: 0; | |
| } | |
| .followbox .refresh { | |
| margin-left: 1ex; | |
| } | |
| .followbox .suggestions { | |
| border: 2px solid #ECECEC; | |
| margin: 0; | |
| } | |
| .followbox ul { | |
| list-style: none; | |
| padding: 0; | |
| margin: 0; | |
| } | |
| .followbox img { | |
| width: 40px; | |
| height: 40px; | |
| border-radius: 20px; | |
| } | |
| .followbox .username, .followbox .close { | |
| display: inline-block; | |
| position: relative; | |
| bottom: 15px; | |
| left: 5px; | |
| } |
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| class Followbox { | |
| static rewrite(e, user) { | |
| e.style.visibility = user ? "visible" : "hidden"; | |
| user = user || {}; | |
| Object.assign(e.querySelector(".username"), {href: user.html_url, textContent: user.login}); | |
| e.querySelector("img").src = user.avatar_url; | |
| } | |
| static refresh(e) { | |
| if (e) Followbox.rewrite(e); else return; | |
| fetchJSON(`https://api.github.com/users?since=${randomInt(0,500)}`) | |
| .then(randomPickup) | |
| .then(user=>Followbox.rewrite(e, user)); | |
| } | |
| static onRefresh(e) { | |
| Followbox.refresh(querySelectorToRoot(e.srcElement||e, ".suggestion")); | |
| } | |
| static onRefreshGroup(e) { | |
| querySelectorMap(querySelectorToRoot(e.srcElement||e, ".followbox"), ".suggestion", Followbox.refresh); | |
| } | |
| static attach(e) { | |
| querySelectorMap(e, ".close" , e=>e.addEventListener("click", Followbox.onRefresh)); | |
| querySelectorMap(e, ".refresh", e=>e.addEventListener("click", Followbox.onRefreshGroup)); | |
| querySelectorMap(e, ".refresh", e=>e.click()); | |
| } | |
| } | |
| window.addEventListener("load", function() { | |
| querySelectorMap(document, ".followbox", Followbox.attach); | |
| }); | |
| function fetchJSON(url) { | |
| return fetch(url).then(response=>response.json()); | |
| } | |
| function querySelectorMap(e, selector, func) { | |
| return e ? [].map.call(e.querySelectorAll(selector), func) : []; | |
| } | |
| function randomInt(n1, n2) { | |
| return parseInt(Math.random() * (n2 - n1) + n1); | |
| } | |
| function randomPickup(e) { | |
| return e[randomInt(0, e.length)]; | |
| } | |
| function querySelectorToRoot(e, selector) { | |
| return !e || !e.matches | |
| ? null : e.matches(selector) | |
| ? e : arguments.callee(e.parentNode, selector); | |
| } |
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