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  1. <!doctype html><!-- This is a valid HTML5 document. -->

  2. <!-- Screen readers, SEO, extensions and so on. -->

  3. <html lang=fr>

  4. <!-- Has to be within the first 1024 bytes, hence before the <title>

  5.   See: https://www.w3.org/TR/2012/CR-html5-20121217/document-metadata.html#charset -->

  6. <meta charset=utf-8>

  7. <!-- Why no `X-UA-Compatible` meta: https://stackoverflow.com/a/6771584 -->

  8. <!-- The viewport meta is quite crowded and we are responsible for that.

  9.   See: https://codepen.io/tigt/post/meta-viewport-for-2015 -->

  10. <meta name=viewport content="width=device-width,minimum-scale=1,initial-scale=1,shrink-to-fit=no">

  11. <!-- Required to make a valid HTML5 document. -->

  12. <title>Performances et proxy — David Larlet</title>

  13. <!-- Generated from https://realfavicongenerator.net/ such a mess. -->

  14. <link rel="apple-touch-icon" sizes="180x180" href="/static/david/icons/apple-touch-icon.png">

  15. <link rel="icon" type="image/png" sizes="32x32" href="/static/david/icons/favicon-32x32.png">

  16. <link rel="icon" type="image/png" sizes="16x16" href="/static/david/icons/favicon-16x16.png">

  17. <link rel="manifest" href="/manifest.json">

  18. <link rel="mask-icon" href="/static/david/icons/safari-pinned-tab.svg" color="#5bbad5">

  19. <link rel="shortcut icon" href="/static/david/icons/favicon.ico">

  20. <meta name="apple-mobile-web-app-title" content="David Larlet">

  21. <meta name="application-name" content="David Larlet">

  22. <meta name="msapplication-TileColor" content="#da532c">

  23. <meta name="msapplication-config" content="/static/david/icons/browserconfig.xml">

  24. <meta name="theme-color" content="#f0f0ea">

  25. <!-- That good ol' feed, subscribe :p. -->

  26. <link rel=alternate type="application/atom+xml" title=Feed href="/david/log/">

  27. 

  28.   <!-- Canonical URL for SEO purposes -->

  29.   <link rel="canonical" href="https://larlet.fr/david/stream/2015/05/21/">

  30. 

  31. <style>

  32. /* http://meyerweb.com/eric/tools/css/reset/ */

  33. html, body, div, span,

  34. h1, h2, h3, h4, h5, h6, p, blockquote, pre,

  35. a, abbr, address, big, cite, code,

  36. del, dfn, em, img, ins,

  37. small, strike, strong, tt, var,

  38. dl, dt, dd, ol, ul, li,

  39. fieldset, form, label, legend,

  40. table, caption, tbody, tfoot, thead, tr, th, td,

  41. article, aside, canvas, details, embed,

  42. figure, figcaption, footer, header, hgroup,

  43. menu, nav, output, ruby, section, summary,

  44. time, mark, audio, video {

  45.   margin: 0;

  46.   padding: 0;

  47.   border: 0;

  48.   font-size: 100%;

  49.   font: inherit;

  50.   vertical-align: baseline;

  51. }

  52. /* HTML5 display-role reset for older browsers */

  53. article, aside, details, figcaption, figure,

  54. footer, header, hgroup, menu, nav, section { display: block; }

  55. body { line-height: 1; }

  56. blockquote, q { quotes: none; }

  57. blockquote:before, blockquote:after,

  58. q:before, q:after {

  59.   content: '';

  60.   content: none;

  61. }

  62. table {

  63.   border-collapse: collapse;

  64.   border-spacing: 0;

  65. }

  66. 

  67. /* http://practicaltypography.com/equity.html */

  68. /* https://calendar.perfplanet.com/2016/no-font-face-bulletproof-syntax/ */

  69. /* https://www.filamentgroup.com/lab/js-web-fonts.html */

  70. @font-face {

  71.   font-family: 'EquityTextB';

  72.   src: url('/static/david/css/fonts/Equity-Text-B-Regular-webfont.woff2') format('woff2'),

  73.        url('/static/david/css/fonts/Equity-Text-B-Regular-webfont.woff') format('woff');

  74.   font-weight: 300;

  75.   font-style: normal;

  76.   font-display: swap;

  77. }

  78. @font-face {

  79.   font-family: 'EquityTextB';

  80.   src: url('/static/david/css/fonts/Equity-Text-B-Italic-webfont.woff2') format('woff2'),

  81.        url('/static/david/css/fonts/Equity-Text-B-Italic-webfont.woff') format('woff');

  82.   font-weight: 300;

  83.   font-style: italic;

  84.   font-display: swap;

  85. }

  86. @font-face {

  87.   font-family: 'EquityTextB';

  88.   src: url('/static/david/css/fonts/Equity-Text-B-Bold-webfont.woff2') format('woff2'),

  89.        url('/static/david/css/fonts/Equity-Text-B-Bold-webfont.woff') format('woff');

  90.   font-weight: 700;

  91.   font-style: normal;

  92.   font-display: swap;

  93. }

  94. @font-face {

  95.   font-family: 'TriplicateT4c';

  96.   src: url('/static/david/css/fonts/Triplicate-T4-Code-Regular-webfont.woff2') format('woff2'),

  97.        url('/static/david/css/fonts/Triplicate-T4-Code-Regular-webfont.woff') format('woff');

  98.   font-weight: 300;

  99.   font-style: normal;

  100.   font-display: swap;

  101. }

  102. 

  103. /* http://practice.typekit.com/lesson/caring-about-opentype-features/ */

  104. body {

  105.   /* http://www.cssfontstack.com/ Palatino 99% Win 86% Mac */

  106.   font-family: "EquityTextB", Palatino, serif;

  107.   background-color: #f0f0ea;

  108.   color: #07486c;

  109.   font-kerning: normal;

  110.   -moz-osx-font-smoothing: grayscale;

  111.   -webkit-font-smoothing: subpixel-antialiased;

  112.   text-rendering: optimizeLegibility;

  113.   font-variant-ligatures: common-ligatures contextual;

  114.   font-feature-settings: "kern", "liga", "clig", "calt";

  115. }

  116. pre, code, kbd, samp, var, tt {

  117.   font-family: 'TriplicateT4c', monospace;

  118. }

  119. em {

  120.   font-style: italic;

  121.   color: #323a45;

  122. }

  123. strong {

  124.   font-weight: bold;

  125.   color: black;

  126. }

  127. nav {

  128.   background-color: #323a45;

  129.   color: #f0f0ea;

  130.   display: flex;

  131.   justify-content: space-around;

  132.   padding: 1rem .5rem;

  133. }

  134.   nav:first-child {

  135.     border-top: 1vh solid #2d7474;

  136.   }

  137.   nav:last-child {

  138.     border-bottom: 1vh solid #2d7474;

  139.   }

  140.   nav a {

  141.     color: #f0f0ea;

  142.   }

  143.   nav abbr {

  144.     border-bottom: 1px dotted white;

  145.   }

  146. 

  147. h1 {

  148.   border-bottom: .2vh solid #2d7474;

  149.   background-color: #e3e1e1;

  150.   color: #323a45;

  151.   text-align: center;

  152.   padding: 2rem 0 1rem;

  153.   width: 100%;

  154. }

  155. h2 {

  156.   margin: 4rem 0 1rem;

  157.   border-top: .2vh solid #2d7474;

  158. }

  159. h3 {

  160.   text-align: center;

  161.   margin: 3rem 0 .75em;

  162. }

  163. hr {

  164.   height: .4rem;

  165.   width: .4rem;

  166.   border-radius: .4rem;

  167.   background: #07486c;

  168.   margin: 2.5rem auto;

  169. }

  170. time {

  171.   display: bloc;

  172.   background-color: #2d7474;

  173.   color: #e3e1e1;

  174.   padding: .29rem 1rem;

  175.   float: right;

  176. }

  177. ul, ol {

  178.   margin: 2rem;

  179. }

  180. ul {

  181.   list-style-type: square;

  182. }

  183. a {

  184.   text-decoration-skip-ink: auto;

  185. }

  186. article {

  187.   max-width: 50rem;

  188.   display: flex;

  189.   flex-direction: column;

  190.   margin: 3rem auto 1rem auto;

  191. }

  192.   article p:last-child {

  193.     margin-bottom: 1rem;

  194.   }

  195. p {

  196.   padding: 0 .5rem;

  197. }

  198.   p + p {

  199.     margin-top: 2rem;

  200.   }

  201. 

  202. blockquote {

  203.   background-color: #e3e1e1;

  204.   border-left: .5vw solid #2d7474;

  205.   display: flex;

  206.   flex-direction: column;

  207.   align-items: center;

  208.   padding: 1rem;

  209.   margin: 1.5rem;

  210. }

  211.   blockquote cite {

  212.     font-style: italic;

  213.   }

  214. 

  215. figure {

  216.   border-top: .2vh solid #2d7474;

  217.   background-color: #e3e1e1;

  218.   text-align: center;

  219.   padding: 1.5rem 0;

  220.   margin: 1rem 0 0;

  221.   font-size: 1.5rem;

  222.   width: 100%;

  223. }

  224.   figure img {

  225.     width: 250px;

  226.     height: 250px;

  227.     border: .5vw solid #323a45;

  228.     padding: 1px;

  229.   }

  230. figcaption {

  231.   padding: 1rem;

  232.   line-height: 1.4;

  233. }

  234. aside {

  235.   display: flex;

  236.   flex-direction: column;

  237.   background-color: #e3e1e1;

  238.   padding: 1rem 0;

  239.   border-bottom: .2vh solid #07486c;

  240. }

  241.   aside p {

  242.     max-width: 50rem;

  243.     margin: 0 auto;

  244.   }

  245. 

  246. /* https://fvsch.com/code/css-locks/ */

  247. p, li, pre, code, kbd, samp, var, tt, time {

  248.   font-size: .95rem;

  249.   line-height: calc( 1.5em + 0.2 * 1rem );

  250. }

  251. h1 {

  252.   font-size: 1.7rem;

  253.   line-height: calc( 1.2em + 0.2 * 1rem );

  254. }

  255. h2 {

  256.   font-size: 1.6rem;

  257.   line-height: calc( 1.3em + 0.2 * 1rem );

  258. }

  259. h3 {

  260.   font-size: 1.35rem;

  261.   line-height: calc( 1.4em + 0.2 * 1rem );

  262. }

  263. @media (min-width: 20em) {

  264.   /* The (100vw - 20rem) / (50 - 20) part

  265.      resolves to 0-1rem, depending on the

  266.      viewport width (between 20em and 50em). */

  267.   p, li, pre, code, kbd, samp, var, tt, time {

  268.     font-size: calc( .95rem + .6 * (100vw - 20rem) / (50 - 20) );

  269.     line-height: calc( 1.5em + 0.2 * (100vw - 50rem) / (20 - 50) );

  270.   }

  271.   h1 {

  272.     font-size: calc( 1.7rem + 1.5 * (100vw - 20rem) / (50 - 20) );

  273.     line-height: calc( 1.2em + 0.2 * (100vw - 50rem) / (20 - 50) );

  274.   }

  275.   h2 {

  276.     font-size: calc( 1.5rem + 1.5 * (100vw - 20rem) / (50 - 20) );

  277.     line-height: calc( 1.3em + 0.2 * (100vw - 50rem) / (20 - 50) );

  278.   }

  279.   h3 {

  280.     font-size: calc( 1.35rem + 1.5 * (100vw - 20rem) / (50 - 20) );

  281.     line-height: calc( 1.4em + 0.2 * (100vw - 50rem) / (20 - 50) );

  282.   }

  283. }

  284. @media (min-width: 50em) {

  285.   /* The right part of the addition *must* be a

  286.      rem value. In this example we *could* change

  287.      the whole declaration to font-size:2.5rem,

  288.      but if our baseline value was not expressed

  289.      in rem we would have to use calc. */

  290.   p, li, pre, code, kbd, samp, var, tt, time {

  291.     font-size: calc( .95rem + .6 * 1rem );

  292.     line-height: 1.5em;

  293.   }

  294.   h1 {

  295.     font-size: calc( 1.7rem + 1.5 * 1rem );

  296.     line-height: 1.2em;

  297.   }

  298.   h2 {

  299.     font-size: calc( 1.5rem + 1.5 * 1rem );

  300.     line-height: 1.3em;

  301.   }

  302.   h3 {

  303.     font-size: calc( 1.35rem + 1.5 * 1rem );

  304.     line-height: 1.4em;

  305.   }

  306.   figure img {

  307.     width: 500px;

  308.     height: 500px;

  309.   }

  310.   blockquote {

  311.     margin-left: -1.5rem;

  312.   }

  313. }

  314. 

  315. figure.unsquared {

  316.   margin-bottom: 1.5rem;

  317. }

  318.   figure.unsquared img {

  319.     height: inherit;

  320.   }

  321. 

  322. /* https://github.com/richleland/pygments-css */

  323. .codehilite{

  324.     background-color: #fdf6e3;

  325.     margin: 1rem auto;

  326.     padding: 1rem;

  327.     overflow-x:auto;

  328.     box-shadow:inset 0 0 2px rgba(0,0,0,0.2)

  329. }

  330. .codehilite .t{color:#586e75}

  331. .codehilite .w{color:#073642}

  332. .codehilite .err{color:#cb4b16}

  333. .codehilite .k{color:#859900}

  334. .codehilite .kc{color:#2aa198}

  335. .codehilite .kd{color:#268bd2}

  336. .codehilite .kn{color:#b58900}

  337. .codehilite .kp{color:#859900}

  338. .codehilite .kr{color:#073642}

  339. .codehilite .kt{color:#b58900}

  340. .codehilite .n{color:#586e75}

  341. .codehilite .na{color:#2aa198}

  342. .codehilite .nb{color:#268bd2}

  343. .codehilite .nc{color:#268bd2}

  344. .codehilite .ne{color:#cb4b16}

  345. .codehilite .no{color:#2aa198}

  346. .codehilite .nd{color:#2aa198}

  347. .codehilite .ni{color:#2aa198;font-weight:bold}

  348. .codehilite .nf{color:#268bd2}

  349. .codehilite .nn{color:#586e75}

  350. .codehilite .nt{color:#2aa198;font-weight:bold}

  351. .codehilite .nv{color:#cb4b16}

  352. .codehilite .b{color:#859900}

  353. .codehilite .bp{color:#586e75}

  354. .codehilite .v{color:#586e75}

  355. .codehilite .vc{color:#586e75}

  356. .codehilite .vg{color:#268bd2}

  357. .codehilite .vi{color:#268bd2}

  358. .codehilite .m{color:#268bd2}

  359. .codehilite .mf{color:#268bd2}

  360. .codehilite .mh{color:#268bd2}

  361. .codehilite .mi{color:#268bd2}

  362. .codehilite .mo{color:#268bd2}

  363. .codehilite .s{color:#2aa198}

  364. .codehilite .sb{color:#2aa198}

  365. .codehilite .sc{color:#2aa198}

  366. .codehilite .sd{color:#2aa198}

  367. .codehilite .s2{color:#2aa198}

  368. .codehilite .se{color:#cb4b16}

  369. .codehilite .sh{color:#2aa198}

  370. .codehilite .si{color:#cb4b16}

  371. .codehilite .sx{color:#2aa198}

  372. .codehilite .sr{color:#cb4b16}

  373. .codehilite .s1{color:#2aa198}

  374. .codehilite .ss{color:#cb4b16}

  375. .codehilite .il{color:#268bd2}

  376. .codehilite .o{color:#586e75}

  377. .codehilite .ow{color:#859900}

  378. .codehilite .p{color:#586e75}

  379. .codehilite .c{color:#93a1a1;font-style:italic}

  380. .codehilite .cm{color:#93a1a1}

  381. .codehilite .cp{color:#93a1a1}

  382. .codehilite .c1{color:#93a1a1}

  383. .codehilite .cs{color:#93a1a1}

  384. .codehilite .hll{background-color:#dc322f}

  385. .codehilite .g{color:#586e75}

  386. .codehilite .gd{color:#586e75}

  387. .codehilite .ge{font-style:italic}

  388. .codehilite .gr{color:#586e75}

  389. .codehilite .gh{color:#586e75;font-weight:bold}

  390. .codehilite .gi{color:#586e75}

  391. .codehilite .go{color:#586e75}

  392. .codehilite .gp{color:#586e75}

  393. .codehilite .gs{font-weight:bold}

  394. .codehilite .gu{color:#586e75;font-weight:bold}

  395. .codehilite .gt{color:#586e75}

  396. 

  397. @media print {

  398.   body { font-size: 100%; }

  399.   a:after { content: " (" attr(href) ")"; }

  400.   a, a:link, a:visited, a:after {

  401.     text-decoration: underline;

  402.     text-shadow: none !important;

  403.     background-image: none !important;

  404.     background: white;

  405.     color: black;

  406.   }

  407.   abbr[title] { border-bottom: 0; }

  408.   abbr[title]:after { content: " (" attr(title) ")"; }

  409.   img { page-break-inside: avoid; }

  410.   @page { margin: 2cm .5cm; }

  411.   h1, h2, h3 { page-break-after: avoid; }

  412.   p3 { orphans: 3; widows: 3; }

  413.   img {

  414.     max-width: 250px !important;

  415.     max-height: 250px !important;

  416.   }

  417.   nav, aside { display: none; }

  418. }

  419. 

  420. /* Dark theme */

  421. [lang=en] body {

  422.   background: #323a45;

  423. }

  424.   [lang=en] article,

  425.   [lang=en] article em,

  426.   [lang=en] article strong {

  427.     color: #f0f0ea;

  428.   }

  429.     [lang=en] article a {

  430.       color: #ffbd2b;

  431.     }

  432.     [lang=en] article a:visited {

  433.       color: #ff6b03;

  434.     }

  435.   [lang=en] blockquote,

  436.   [lang=en] figure {

  437.     background: #111930;

  438.     color: #ccc;

  439.   }

  440. </style>

  441. <nav>

  442.   <p>

  443.     <a href="/david/" title="Profil public">David&nbsp;Larlet</a> partage ses <a href="/david/blog/" title="Expériences bienveillantes">réflexions</a> et sa <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a>.

  444.   </p>

  445. </nav>

  446. 

  447. <h1>Performances et proxy</h1>

  448. <time>2015-05-21</time>

  449. <article>

  450.   <blockquote>

  451. <p>And that’s happening in spite of all the improvements we’ve seen in the last few years. Better tooling. Better browsers. Better standards. Better awareness (at least from a cursory glance based on conference lineups and blog posts). Sure, all of those areas have plenty of room for improvement, but it’s entirely possible to build a site that performs well today.</p>

  452. <p>So why is this a problem? Is the web just inherently slow and destined to never be able to compete with the performance offered by a native platform?</p>

  453. <p><cite><em><a href="http://timkadlec.com/2015/05/choosing-performance/">Choosing performance</a></em> (<a href="/david/cache/69b464f86acf9f8fdb3250fadffc1be1/">cache</a>)</cite></p>

  454. </blockquote>

  455. <p>Si vous n’avez pas suivi le nouveau service de Facebook, vous pouvez consulter <a href="https://www.baldurbjarnason.com/notes/media-websites-vs-facebook/">l’excellente revue de blogs</a> (<a href="/david/cache/92bdb2bb826299c4eb5a002dcdd1e42e/">cache</a>) commentée de Baldur Bjarnason. C’est intéressant à plus d’un titre, surtout après ce que j’ai entrepris ici-même. Cela reflète bien les questionnements que j’ai sur la pérennité et l’accessibilité des contenus. Il y a une couche de monétisation bien sûr mais le problème est plus profond. Trop de rédacteurs acceptent que leurs contenus soient dégradés intentionnellement, trop de développeurs acceptent de dégrader des contenus intentionnellement.</p>

  456. <p>Je me demande si des personnes préfèrent cliquer sur les liens en cache sur cet espace ? Pour la lisibilité ? Pour la performance ? Pour ne pas être profilé ? Pour d’autres raisons ?</p>

  457. </article>

  458. 

  459. 

  460. <nav>

  461.   <p>

  462.     <a rel=prev href="/david/stream/2015/05/20/">← Python et cache</a> | <a href="/david/stream/2015/" title="Retour à la liste complète">↑</a> | <a  rel=next href="/david/stream/2015/05/22/">Stratégie de publication →</a>

  463.   </p>

  464. </nav>

  465. 

  466. 

  467. 

  468.   

  469. <aside>

  470.   <p>

  471.     Articles choisis :

  472.     <a href="/david/blog/2018/commodite-effondrement/" title="Accéder à l’article complet">Commodité et effondrement</a>,

  473.     <a href="/david/blog/2017/donnees-communs/" title="Accéder à l’article complet">Des données aux communs</a>,

  474.     <a href="/david/blog/2016/accompagner-enfant/" title="Accéder à l’article complet">Accompagner un enfant</a>,

  475.     <a href="/david/blog/2016/senior-developer/" title="Accéder à l’article complet">Senior developer</a>,

  476.     <a href="/david/blog/2016/illusion-sociale/" title="Accéder à l’article complet">L’illusion sociale</a>,

  477.     <a href="/david/blog/2016/instantane-scopyleft/" title="Accéder à l’article complet">Instantané Scopyleft</a>,

  478.     <a href="/david/blog/2016/enseigner-web/" title="Accéder à l’article complet">Enseigner le Web</a>,

  479.     <a href="/david/blog/2016/simplicite-defaut/" title="Accéder à l’article complet">Simplicité par défaut</a>,

  480.     <a href="/david/blog/2016/minimalisme-esthetique/" title="Accéder à l’article complet">Minimalisme et esthétique</a>,

  481.     <a href="/david/blog/2015/travail-transition/" title="Accéder à l’article complet">Travail en transition</a>,

  482.     <a href="/david/blog/2015/pairmutation-travail/" title="Accéder à l’article complet">La pairmutation du travail</a>,

  483.     <a href="/david/blog/2015/principes-web/" title="Accéder à l’article complet">Principes Web</a>,

  484.     <a href="/david/blog/2015/travail-transition/" title="Accéder à l’article complet">Travail en transition</a>,

  485.     <a href="/david/blog/2014/un-web-omni-present/" title="Accéder à l’article complet">Un web omni-présent</a>,

  486.     <a href="/david/blog/2014/manifeste-developpeur/" title="Accéder à l’article complet">Manifeste de développeur</a>,

  487.     <a href="/david/blog/2013/confort-convivialite/" title="Accéder à l’article complet">Confort et convivialité</a>,

  488.     <a href="/david/blog/2013/testament-numerique/" title="Accéder à l’article complet">Testament numérique</a>,

  489.     et <a href="/david/blog/" title="Accéder aux archives">bien d’autres…</a>

  490.   </p>

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  492. 

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  497.     <abbr title="Lieu de vie et de potentielles rencontres actuel">Montréal</abbr> ·

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  502.   </p>

  503. </nav>

  504. 

  505.   <script>

  506.   /* Service workers */

  507.   if (navigator.serviceWorker) {

  508.     window.addEventListener('load', function () {

  509.       var selector = 'a[href^="/david/cache/"], a[rel=prev], a[rel=next]'

  510.       function sendLinks (selector) {

  511.         var links = [].slice.call(document.querySelectorAll(selector)).map(function (link) {

  512.           return link.getAttribute('href')

  513.         })

  514.         links.push(location.pathname)  // Put the current page in cache too.

  515.         navigator.serviceWorker.controller.postMessage({ links: links })

  516.       }

  517.       navigator.serviceWorker.getRegistration()

  518.         .then(function (registration) {

  519.           if (!registration || !navigator.serviceWorker.controller) {

  520.             return navigator.serviceWorker.register('/serviceworker.js')

  521.               .then(navigator.serviceWorker.ready)

  522.               .then(function () {

  523.                 console.log('[ServiceWorker] Ready to go!')

  524.               })

  525.               .catch(console.error.bind(console))

  526.           } else {

  527.             console.log('[ServiceWorker] Send links via registration')

  528.             sendLinks(selector)

  529.           }

  530.         })

  531.       navigator.serviceWorker.addEventListener('controllerchange', function () {

  532.         console.log('[ServiceWorker] Send links via controller change')

  533.         sendLinks(selector)

  534.       })

  535.       navigator.serviceWorker.addEventListener('message', function (event) {

  536.         var link = document.querySelector('a[href="' + event.data.link + '"]')

  537.         if (event.data.status && link) {

  538.           link.style.backgroundColor = '#2d7474'

  539.           link.style.color = '#f0f0ea'

  540.           

  541.             link.setAttribute('title', 'En cache pour consultation sans connexion')

  542.           

  543.         }

  544.       })

  545.     })

  546.   } else {

  547.     console.warn('[ServiceWorker] No cache for old browsers.')

  548.   }

  549. </script>