こえのブログでのPWA ~ PWA編 ~ / PWA Night Vol.4

Transcript

1. こえのブログでのPWA ~ PWA編 ~ 2019年5月15日 @株式会社ウフル Kazunari Hara

2. 原 一成 Hara Kazunari Web Developer @herablog

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5. 喋るだけで ブログになる

6. 本人の”声”でコンテンツ価値向上 https://voice.ameba.jp/emb ed/kobayashi-maya/rxxqHm 6s4iAqYRP4mjK5 https://voice.ameba.jp/e mbed/kose-sports/eaxzb 5mP6vMlw3FWpqX9 https://voice.ameba.jp/e mbed/toshl-official/9nzC7 iAFn6IDKHPerj6P

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8. https://github.com/webmaxru/progressive-web-apps-logo

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14. クロスプラットフォーム 小さくリリースできる ブラウザ機能の充実 ✖

15. Lighthouseでhttps://voice.ameba.jp/をMobile、Simulated Fast 3G、4x CPU Slowdown、ローカル環境で測定。

16. are user experiences.” “ https://developers.google.com/web/progressive-web-apps/

17. キャッシュ UIパーツ マルチメディア

18. サーバーサイド & クライアントサイド キャッシュ

19. Network GET / GET /voice-app.js GET /api/entry.json

20. Server DB Browser I/O 計算量 キャパシティ リダイレクト クエリ性能 ネットワーク状況 地理

21. Server DB Browser CDN

22. CDN利用: できる限りキャッシュ イベント駆動パージ エッジコンピューティング

23. できる限りキャッシュ: Time To Live (TTL) Surrogate Key

24. Method Path TTL Surrogate Key GET / max-age=2592000 web, web/release

    GET /src/components/voice-app.js max-age=2592000 web, web/release GET /assets/audios/stadard/$USER _ID/$ENTRY_ID.mp3 max-age=2592000 api, entry/$ENTRY_ID, blogger/$USER_ID GET /api/entries/$USER_ID/$ENTR Y_ID/ max-age=2592000 api, entry/$ENTRY_ID, blogger/$USER_ID GET /api/playcounts/$USER_ID/$EN TRY_ID/ max-age=30, stale-while-revali date=120 api, entry/$ENTRY_ID, blogger/$USER_ID

25. イベント駆動パージ

26. # Surrogate Keyを操作 sub vcl_fetch { declare local var.SurrogateKey STRING;

    If (req.http.x-url ~ "/audios/standard/([a-z0-9-]{3,24})/([a-zA-Z0-9]+)") { set var.SurrogateKey = var.SurrogateKey + " blogger/" + re.group.1 + " entry/" + re.group.2 + " audio/" + re.group.2; // e.g. "blogger/abcde", "entry/12345" } set beresp.http.Surrogate-Key = var.SurrogateKey; }

27. # ブラウザに配信するHTTPレスポンスヘッダーを追加 sub vcl_deliver { add resp.http.Server-Timing = fastly_info.state {",

    fastly;desc="Edge time";dur="} time.elapsed.msec; set resp.http.Referrer-Policy = "origin-when-cross-origin"; set resp.http.X-Content-Type-Options = "nosniff"; add resp.http.Content-Security-Policy = "default-src 'self'; script-src 'self'..." }

28. CDN詳細は、 WEB+DB PRESS vol.109

29. クライアントキャッシュ: HTTP Headers Service Worker (Cache API) キャッシュ

30. HTTP Headerでの キャッシュ Cache-Control: maxage=3600

31. “25.5% of all logged requests were missing the cache.” https://code.fb.com/web/web-performance-cache-efficiency-exercise/

32. Service Worker (Cache API) で オリジン毎にキャッシュコ ントロール

33. プリキャッシュ: アプリの雛形となる ファイル(HTML, Image, JS) 全て Index.html (Entrypoint) Voice-app.js (App

    shell) voice-home.js voice-editor.js lazy-resources.js PRPLパターン (Fragment)

34. プリキャッシュ: 各ファイルの変更毎に 入れ替え workbox.precaching.precacheAndRou te([{ url: "index.html", revision: "999s0cnacavav" },

    …]);

35. index.html

36. onload Service Worker

37. Pre-cache assets

38. Reload Activate Service Worker

39. No Network Connection

40. Update Service Worker New Version App

41. 変更があるファイル だけ更新

42. No Network Connection

43. ランタイムキャッシュ: オフラインや次回訪問に 備えてAPIデータや アセットをキャッシュ Cache First アートワーク画像 Network First 変更が多いAPIデータ

    Stale While Revalidate 変更が少ないAPIデータ
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45. UIパーツ

46. Web Components (LitElement) CSRのWebアプリ モバイルター ゲット コンポーネント Web標準 Web Components

47. <!-- use component --> <voice-mic recording> </voice-mic>

48. class VoiceMic extends LitElement { _handleMicClick() { this.dispatchEvent(new CustomEvent('mic-click')); }

    render() { const { disabled, recording } = this; const buttonLabel = recording ? '停止' : '開始'; return html` <style></style> <button aria-label=${buttonLabel} aria-live="assertive" ?disabled=${disabled} type="button" @click=${this._handleMicClick} ></button> `; } } customElements.define('voice-mic', VoiceMic);

49. class VoiceMic extends LitElement { _handleMicClick() { this.dispatchEvent(new CustomEvent('mic-click')); }

    render() { const { disabled, recording } = this; const buttonLabel = recording ? '停止' : '開始'; return html` <style></style> <button aria-label=${buttonLabel} aria-live="assertive" ?disabled=${disabled} type="button" @click=${this._handleMicClick} ></button> `; } } customElements.define('voice-mic', VoiceMic);

50. class VoiceMic extends LitElement { _handleMicClick() { this.dispatchEvent(new CustomEvent('mic-click')); }

    render() { const { disabled, recording } = this; const buttonLabel = recording ? '停止' : '開始'; return html` <style></style> <button aria-label=${buttonLabel} aria-live="assertive" ?disabled=${disabled} type="button" @click=${this._handleMicClick} ></button> `; } } customElements.define('voice-mic', VoiceMic);

51. class VoiceMic extends LitElement { _handleMicClick() { this.dispatchEvent(new CustomEvent('mic-click')); }

    render() { const { disabled, recording } = this; const buttonLabel = recording ? '停止' : '開始'; return html` <style></style> <button aria-label=${buttonLabel} aria-live="assertive" ?disabled=${disabled} type="button" @click=${this._handleMicClick} ></button> `; } } customElements.define('voice-mic', VoiceMic);

52. class VoiceMic extends LitElement { _handleMicClick() { this.dispatchEvent(new CustomEvent('mic-click')); }

    render() { const { disabled, recording } = this; const buttonLabel = recording ? '停止' : '開始'; return html` <style></style> <button aria-label=${buttonLabel} aria-live="assertive" ?disabled=${disabled} type="button" @click=${this._handleMicClick} ></button> `; } } customElements.define('voice-mic', VoiceMic);

53. 166 KB (gzip, style込み)

54. オフライン対応: IndexedDB Service Worker (Cache API) navigator.onLine

55. 下書き保存 with IndexedDB

56. 記事データが 更新されると Indexed DBに 保存

57. Offline Recording with Service Worker

58. Index.html (Entrypoint) Voice-app.js (App shell) voice-home.js voice-editor.js lazy-resources.js PRPLパターン (Fragment)

    Offline Recording with Service Worker

59. Offline Notification with navigator.onLine

60. function watchOffline(callback) { window.addEventListener( ’online’, () => callback(false), ); window.addEventListener(

    ‘offline’, () => callback(true), ); callback( navigator.onLine === false ); }

61. watchOffline((offline) => { If (offline) { // Display snack bar

    } });

62. Web App: Web App Manifest Media Queries Responsive Images Desktop

    PWA

63. { "short_name": "こえ", "name": "こえのブログ by Ameba", "description": "「こえのブログ」は、...", "lang":

    "ja-JP", "icons": [], "background_color": "#fff", "theme_color": "#fff", "start_url": "/?source=homescreen", "scope": "/", "display": "standalone" } manifest.json

64. https://twitter.com/Nkzn/status/1110369084166692864

65. 1025pxからDesktop版

66. @media screen and (min-width: 1025px) { :root { --app-header-height: 60px;

    --app-page-background-color: var(--clr-whitesmoke); --app-drawer-width: 400px; ... } }

67. Responsive Images <img height="80" width="80" src="toshi.jpg?size=80" srcset=" toshi.jpg?size=160 2x, toshi.jpg?size=240

    3x, " />

68. 追加設定なしで Desktop PWA

69. ネットワーク状況 Network Information API

70. function watchNetwork (callback) { const connection = navigator.connection; if (connection)

    { callback(connection); connection.addEventListener( 'change', () => callback(connection) ); } } watchNetwork(({ effectiveType } => { if (effectiveType.includes('2g')) { // Display notification } });

71. Lazy-loading: Intersection Observer Native lazy-loading (onscroll)

72. Lazy-loading: Intersection Observer Native lazy-loading (Beta)

73. class LazyloadImage extends LitElement { firstUpdated() { If ('loading' in

    HTMLImageElement.prototype) { this.shadowRoot.querySelector(‘img’).src = this.src; } else { // Use Intersection Observer } } render() { return html` <img alt=${alt} data-src=${src} loading="lazy" height=${height} srcset=${srcset} width=${width} /> `; } }

74. こえのブログをシェア with Web Share API

75. if (navigator.share) { navigator.share({ title: ‘こえのブログ by Ameba’, text: ‘こえのブログは...’,

    url: ‘https://voice.ameba.jp/’, }); } else { // Open custom dialog }

76. こえのブログを貼り付け with Clipboard API

77. const text = ‘text to copy’; if (navigator.clipboard) { navigator.clipboard.writeText(

    Text ); } else { // document.execCommand('copy'); }

78. Vibrate Notification with Vibration API

79. ブッ ブブ ブゥ 録音開始 残り10秒 録音終了

80. function notifyRecordingStart() { navigator.vibrate(30); } function notifyTimeToFinish() { navigator.vibrate([30, 100,

    30]); } function notifyRecordingEnd() { navigator.vibrate(100); } ブブ

81. マルチメディア

82. Audio Recording

83. Mic Web Worker Browser Blob Stream Messaging Messaging

84. 端末のマイクに アクセス navigator.mediaDevices .getUserMedia({ audio: { autoGainControl: false, channelCount: 1,

    echoCancellation: true, noiseSuppression: true, }, }) .then((stream) => { // use the stream }) .catch((err) => { // NotAllowedError or // NotFoundError });

85. 録音中の音声圧縮 WebAssembly & Web Worker WAV MP3

86. https://github.com/Kagami/vmsg Kagami/vmsg

87. 録音した音声を操作 with Blob (Binary Large OBject) // Save to IndexedDB

    const transaction = db.transaction( ['voice'], 'readwrite'); const objectStore = transaction.objectStore('voice'); const objectStoreRequest = objectStore.put({ audio: blob }); // Create URL to play audio URL.createObjectURL(blob); blob:https://voice.ameba.jp/76ee6fef-c126-4 f83-8a46-8fb00db57808

88. Read Photo

89. Camera/Photo Browser Server Blob ArrayBuffer File API Resize/Upload

90. <input type="file" accept="image/jpeg" /> function onFileChange(event) { const el =

    event.target; if (el.files && el.files[0]) { const reader = new FileReader(); reader.onload = e => { const buffer = e.target.result; const type = el.files[0].type; const blob = new Blob([buffer], { type }); const fileName = el.files[0].name; }; } } 端末画像を読み込み with File API

91. window.loadImage( blob, canvas = > canvas.toBlob( resizedBlob => { //

    Display resized image } ), { canvas: true, maxHeight: 1024px, maxWidth: 1024px, }, ); アップロード前に リサイズ

92. https://github.com/blueimp/JavaScript-Load-Image blueimp/ JavaScript-Load-Image (将来的に変更する可能性あり)

93. https://developers.cyberagent.co.jp/blog/archives/20506/ 詳細は・・・ CDN/PWA/Speech Recognition/WASM/Web Components/Service Worker/Performance Budget etc... https://speakerdeck.com/herablog/koe-no-blog-pwa こえのブログでのPWA

94. are user experiences.” “ https://developers.google.com/web/progressive-web-apps/