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  12. <title>Cours IUT : Comprendre JavaScript — David Larlet</title>

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  183.       background: #2d7474;

  184.       font-size: 1.3rem;

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  188. h2 {

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

  191.   padding-top: 1vh;

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  193. h3 {

  194.   text-align: center;

  195.   margin: 3rem 0 .75em;

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  197. hr {

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  199.   width: .4rem;

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  202.   margin: 2.5rem auto;

  203. }

  204. time {

  205.   display: bloc;

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  207. }

  208. ul, ol {

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  211. ul {

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  238.   p + p,

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  242. 

  243. blockquote {

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  259. figure {

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

  261.   background-color: #e3e1e1;

  262.   text-align: center;

  263.   padding: 1.5rem 0;

  264.   margin: 1rem 0 0;

  265.   font-size: 1.5rem;

  266.   width: 100%;

  267. }

  268.   figure img {

  269.     max-width: 250px;

  270.     max-height: 250px;

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

  272.     padding: 1px;

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  274. figcaption {

  275.   padding: 1rem;

  276.   line-height: 1.4;

  277. }

  278. aside {

  279.   display: flex;

  280.   flex-direction: column;

  281.   background-color: #e3e1e1;

  282.   padding: 1rem 0;

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  284. }

  285.   aside p {

  286.     max-width: 50rem;

  287.     margin: 0 auto;

  288.   }

  289. 

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

  291. p, li, pre, code, kbd, samp, var, tt, time, details, figcaption {

  292.   font-size: 1rem;

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

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  295. h1 {

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

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  300.   font-size: 1.6rem;

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  303. h3 {

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

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

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

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  311.   p, li, pre, code, kbd, samp, var, tt, time, details, figcaption {

  312.     font-size: calc( 1rem + .6 * (100vw - 20rem) / (50 - 20) );

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

  314.     margin-left: 0;

  315.   }

  316.   h1 {

  317.     font-size: calc( 1.9rem + 1.5 * (100vw - 20rem) / (50 - 20) );

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

  319.   }

  320.   h2 {

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

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

  323.   }

  324.   h3 {

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

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

  327.   }

  328. }

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

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

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

  333.      but if our baseline value was not expressed

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  335.   p, li, pre, code, kbd, samp, var, tt, time, details, figcaption {

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  337.     line-height: 1.5em;

  338.   }

  339.   p, li, pre, details {

  340.     margin-left: 3rem;

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  350.   h3 {

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

  352.     line-height: 1.4em;

  353.   }

  354.   figure img {

  355.     max-width: 500px;

  356.     max-height: 500px;

  357.   }

  358. }

  359. 

  360. figure.unsquared {

  361.   margin-bottom: 1.5rem;

  362. }

  363.   figure.unsquared img {

  364.     height: inherit;

  365.   }

  366. 

  367. 

  368. 

  369. @media print {

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

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

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

  373.     text-decoration: underline;

  374.     text-shadow: none !important;

  375.     background-image: none !important;

  376.     background: white;

  377.     color: black;

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

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

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

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

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

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

  385.   img {

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  387.     max-height: 250px !important;

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  389.   nav, aside { display: none; }

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  422.   justify-content: space-around;

  423. }

  424.   .gallery figure img {

  425.     margin-left: 1rem;

  426.     margin-right: 1rem;

  427.   }

  428.   .gallery figure figcaption {

  429.     font-family: 'ConcourseT3'

  430.   }

  431. 

  432. footer {

  433.   font-family: 'ConcourseT3';

  434.   display: flex;

  435.   flex-direction: column;

  436.   border-top: 3px solid white;

  437.   padding: 4rem 0;

  438.   background-color: #07486c;

  439.   color: white;

  440. }

  441.   footer > * {

  442.     max-width: 50rem;

  443.     margin: 0 auto;

  444.   }

  445.   footer a {

  446.     color: #f1c40f;

  447.   }

  448.   footer .avatar {

  449.     width: 200px;

  450.     height: 200px;

  451.     border-radius: 50%;

  452.     float: left;

  453.     -webkit-shape-outside: circle();

  454.     shape-outside: circle();

  455.     margin-right: 2rem;

  456.     padding: 2px 5px 5px 2px;

  457.     background: white;

  458.     border-left: 1px solid #f1c40f;

  459.     border-top: 1px solid #f1c40f;

  460.     border-right: 5px solid #f1c40f;

  461.     border-bottom: 5px solid #f1c40f;

  462.   }

  463. </style>

  464. 

  465. <h1 class="single">

  466.   <span><a id="jumper" href="#jumpto" title="Un peu perdu ?">?</a></span>

  467.   Cours IUT : Comprendre JavaScript

  468.   <time>Publié le 9 février 2015</time>

  469. </h1>

  470. <article class="single">

  471.   <blockquote>

  472. <p>Code reviews are a perfect opportunity to continue learning and improving your coding style. I work with a team of experienced developers, so I don’t see many really glaring errors. But when I am called on to review third-party code, I’ve noticed certain bad practices crop up over and over again. Some of these may seem obvious, but hopefully there will be a useful tip or two here for JavaScript developers of every skill level. All examples are based on real production code I’ve reviewed, although (variable) names have been changed to protect the innocent.</p>

  473. <p><cite><em><a href="http://blog.javascripting.com/2014/11/06/real-world-javascript-anti-patterns/">Real-World JavaScript Anti-Patterns (Part One)</a></em> (<a href="/david/cache/e670da5770c6ca884d4915552766f8d0/">cache</a>)</cite></p>

  474. </blockquote>

  475. <p>Le <a href="/david/blog/2015/cours-iut-composants-web/">dernier</a> <a href="/david/pro/enseignement/">cours</a> a été difficile. Les étudiants voulaient essayer AngularJS sans avoir fait préalablement de JavaScript, ce qui s’est soldé par un échec pour faire un petit exercice suite au tutoriel. Après discussion, on a enchaîné sur un autre exercice uniquement JavaScript. Mais un peu trop compliqué, second échec de la matinée et moral en berne avant de se quitter. C’était malgré tout une bonne chose. <strong>Expérimenter l’échec fait partie de l’apprentissage, je pense qu’ils sont maintenant davantage conscients de leurs limites.</strong> Et ils sont frustrés de ne pas pouvoir essayer AngularJS par leur manque de connaissance, pas par le choix arbitraire du prof. Ça leur a donné <em>envie</em> de comprendre JavaScript.</p>

  476. <p>J’avais commencé lors du <a href="/david/blog/2014/cours-iut-javascript-jquery/">cours sur JavaScript</a> avec l’autre partie de la classe à accumuler des scripts à leur faire comprendre/commenter/enrichir. Je me suis résolu à en faire <a href="https://github.com/davidbgk/comprendre-javascript">un dépôt sur Github</a> qui pourrait être réutilisé. J’essaye de commenter au maximum et ça me permet de comprendre moi aussi pas mal de choses à ce langage. Vous pouvez participer avec votre propre expérience et corriger mes exemples en suivant <a href="https://github.com/davidbgk/comprendre-javascript#contraintes">les contraintes du README</a>.</p>

  477. <p>Les ressources qui m’ont été utiles pour reprendre JS de zéro ou presque :</p>

  478. <ul>

  479. <li><a href="https://medium.com/javascript-scene/the-two-pillars-of-javascript-ee6f3281e7f3">The Two Pillars of JavaScript</a> (<a href="/david/cache/01d0d98c268032cbd58e7ccf9f806ebd/">cache</a>)</li>

  480. <li><a href="https://medium.com/javascript-scene/the-two-pillars-of-javascript-pt-2-functional-programming-a63aa53a41a4">The Two Pillars of JavaScript - Pt 2: Functional Programming</a> (<a href="/david/cache/867d86a67d14581fe6e57e0b82d9f146/">cache</a>)</li>

  481. <li><a href="http://davidwalsh.name/javascript-objects">JS Objects: Inherited a Mess</a> (<a href="/david/cache/8a69114624560f6a2ec42877c6747fdd/">cache</a>)</li>

  482. <li><a href="http://davidwalsh.name/javascript-objects-distractions">JS Objects: Distractions</a> (<a href="/david/cache/ff61babc668fdb73cc214268acc1d0ea/">cache</a>)</li>

  483. <li><a href="http://davidwalsh.name/javascript-objects-deconstruction">JS Objects: De"construct"ion</a> (<a href="/david/cache/f8470a704b236ea1c9e2ba3b2aa84274/">cache</a>)</li>

  484. <li><a href="http://blog.javascripting.com/2014/11/06/real-world-javascript-anti-patterns/">Real-World JavaScript Anti-Patterns (Part One)</a> (<a href="/david/cache/e670da5770c6ca884d4915552766f8d0/">cache</a>)</li>

  485. <li><a href="http://blog.javascripting.com/2015/01/12/real-world-javascript-anti-patterns-part-two/">Real-World JavaScript Anti-Patterns (Part Two)</a> (<a href="/david/cache/fe3d245589980bff826bd38b03c12d34/">cache</a>)</li>

  486. </ul>

  487. <p>La lecture de ces 3 séries m’a vraiment aidé à comprendre JavaScript, si vous en avez d’autres je suis preneur.</p>

  488. </article>

  489. 

  490.   <section>

  491.     <h3>Discussion suite à l’article :</h3>

  492. 

  493.       <article id="comment-1" class="comment">

  494.         <ul>

  495. <li><a href="http://eloquentjavascript.net/">The eloquent JavaScript</a></li>

  496. <li><a href="http://bonsaiden.github.io/JavaScript-Garden/">The JavaScript garden</a></li>

  497. <li><a href="https://www.lullabot.com/blog/article/learning-javascript-php-comparison">Learning JavaScript from PHP - a Comparison</a>. Toujours un peu dangereux, mais peu aider quand une personne est très habituée à un autre langage. Et je suppose que certains sont familiers avec PHP.</li>

  498. </ul>

  499.         <p><cite>Karl Dubost, le <a href="#comment-1">2015-02-09 à 16:08:55</a></cite></p>

  500.       </article>

  501. 

  502.       <article id="comment-2" class="comment">

  503.         <blockquote>

  504. <p><a href="http://eloquentjavascript.net/">The eloquent JavaScript</a></p>

  505. </blockquote>

  506. <p>Ah oui celui-là je confirme : très pédagogique, exemples en live,

  507. modifiables etc. Il prend le temps d’expliquer les concepts, même si par

  508. moments il fait des choses optimisables, ça a vraiment le mérite de tout

  509. expliquer pas à pas.</p>

  510.         <p><cite>Stéphane Deschamps, le <a href="#comment-2">2015-02-09 à 19:57:43</a></cite></p>

  511.       </article>

  512. 

  513.   </section>

  514. 

  515. 

  516.   <figure class="image" property="schema:image">

  517.     <img src="/static/david/blog/2015/cours-iut-comprendre-javascript.jpg" alt="" />

  518.   </figure>

  519. 

  520. 

  521. 

  522. <nav id="jumpto">

  523.   <p>

  524.     <a rel=prev href="/david/blog/2015/cours-iut-composants-web/">← Cours IUT : Composants Web</a> | <a href="/david/blog/" title="Retour à la liste des expériences">↑</a> | <a rel=next href="/david/blog/2015/oiseau-bleu/">L’oiseau bleu →</a>

  525.   </p>

  526. </nav>

  527. 

  528. <footer>

  529.   <div>

  530.     <img src="/static/david/david-larlet-avatar.jpg" loading="lazy" class="avatar" width="200" height="200">

  531.     <p>

  532.       Bonjour/Hi!

  533.       Je suis <a href="/david/" title="Profil public">David&nbsp;Larlet</a>, je vis actuellement à Montréal et j’alimente cet espace depuis 15 ans. <br>

  534.       Si tu as apprécié cette lecture, n’hésite pas à poursuivre ton exploration. Par exemple via les <a href="/david/blog/" title="Expériences bienveillantes">réflexions bimestrielles</a>, la <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a> ou en t’abonnant au <a href="/david/log/" title="S’abonner aux publications via RSS">flux RSS</a> (<a href="/david/blog/2019/flux-rss/" title="Tiens c’est quoi un flux RSS ?">so 2005</a>).

  535.     </p>

  536.     <p>

  537.       Je m’intéresse à la place que je peux avoir dans ce monde. En tant qu’humain, en tant que membre d’une famille et en tant qu’associé d’une coopérative. De temps en temps, je fais aussi des <a href="https://github.com/davidbgk" title="Principalement sur Github mais aussi ailleurs">trucs techniques</a>. Et encore plus rarement, <a href="/david/talks/" title="En ce moment je laisse plutôt la place aux autres">j’en parle</a>.

  538.     </p>

  539. 

  540.       <p>

  541.         Les dernières publications hebdomadaires sont :

  542.       </p>

  543.       <ul class="with_columns">

  544. 

  545.           <li>

  546.             <a href="/david/stream/2019/12/31/">Merci</a>

  547.           </li>

  548. 

  549.           <li>

  550.             <a href="/david/stream/2019/12/27/">Intemporels</a>

  551.           </li>

  552. 

  553.           <li>

  554.             <a href="/david/stream/2019/12/24/">Outils</a>

  555.           </li>

  556. 

  557.           <li>

  558.             <a href="/david/stream/2019/12/17/">Origines</a>

  559.           </li>

  560. 

  561.           <li>

  562.             <a href="/david/stream/2019/12/10/">Publier</a>

  563.           </li>

  564. 

  565.           <li>

  566.             <a href="/david/stream/2019/12/03/">En forêt</a>

  567.           </li>

  568. 

  569.           <li>

  570.             <a href="/david/stream/2019/11/26/">Ecocentric</a>

  571.           </li>

  572. 

  573.           <li>

  574.             <a href="/david/stream/2019/11/19/">Se livrer</a>

  575.           </li>

  576. 

  577.           <li>

  578.             <a href="/david/stream/2019/11/12/">Dépendances</a>

  579.           </li>

  580. 

  581.           <li>

  582.             <a href="/david/stream/2019/11/05/">Positif</a>

  583.           </li>

  584. 

  585.           <li>

  586.             <a href="/david/stream/2019/10/29/">Dettes</a>

  587.           </li>

  588. 

  589.           <li>

  590.             <a href="/david/stream/2019/10/22/">Privilèges</a>

  591.           </li>

  592. 

  593.           <li>

  594.             <a href="/david/stream/2019/10/15/">Discrétion</a>

  595.           </li>

  596. 

  597.           <li>

  598.             <a href="/david/stream/2019/10/08/">Désespérance</a>

  599.           </li>

  600. 

  601.           <li>

  602.             <a href="/david/stream/2019/10/01/">Présent</a>

  603.           </li>

  604. 

  605.           <li>

  606.             <a href="/david/stream/2019/09/24/">Manifester</a>

  607.           </li>

  608. 

  609.           <li>

  610.             <a href="/david/stream/2019/09/17/">Arpenter</a>

  611.           </li>

  612. 

  613.           <li>

  614.             <a href="/david/stream/2019/09/10/">Nostalgie</a>

  615.           </li>

  616. 

  617.           <li>

  618.             <a href="/david/stream/2019/09/03/">Déconstruire</a>

  619.           </li>

  620. 

  621.           <li>

  622.             <a href="/david/stream/2019/08/27/">Documenter</a>

  623.           </li>

  624. 

  625.           <li>

  626.             <a href="/david/stream/2019/08/20/">Frustration</a>

  627.           </li>

  628. 

  629.           <li>

  630.             <a href="/david/stream/2019/08/13/">Holisme</a>

  631.           </li>

  632. 

  633.           <li>

  634.             <a href="/david/stream/2019/08/06/">1%</a>

  635.           </li>

  636. 

  637.           <li>

  638.             <a href="/david/stream/2019/07/30/">Exemplarité</a>

  639.           </li>

  640. 

  641.           <li>

  642.             <a href="/david/stream/2019/07/23/">Timelines</a>

  643.           </li>

  644. 

  645.           <li>

  646.             <a href="/david/stream/2019/07/16/">Écoute</a>

  647.           </li>

  648. 

  649.           <li>

  650.             <a href="/david/stream/2019/07/02/">Anxiété</a>

  651.           </li>

  652. 

  653.           <li>

  654.             <a href="/david/stream/2019/06/21/">À lier</a>

  655.           </li>

  656. 

  657.           <li>

  658.             <a href="/david/stream/2019/06/14/">Pauvreté</a>

  659.           </li>

  660. 

  661.           <li>

  662.             <a href="/david/stream/2019/06/07/">Amateur</a>

  663.           </li>

  664. 

  665.           <li>

  666.             <a href="/david/stream/2019/05/31/">Pollution</a>

  667.           </li>

  668. 

  669.           <li>

  670.             <a href="/david/stream/2019/05/24/">Apaisement</a>

  671.           </li>

  672. 

  673.           <li>

  674.             <a href="/david/stream/2019/05/10/">Folie</a>

  675.           </li>

  676. 

  677.           <li>

  678.             <a href="/david/stream/2019/05/03/">Sympathie</a>

  679.           </li>

  680. 

  681.           <li>

  682.             <a href="/david/stream/2019/04/12/">Péremption</a>

  683.           </li>

  684. 

  685.           <li>

  686.             <a href="/david/stream/2019/04/05/">Définitions</a>

  687.           </li>

  688. 

  689.           <li>

  690.             <a href="/david/stream/2019/03/29/">Acceptation</a>

  691.           </li>

  692. 

  693.           <li>

  694.             <a href="/david/stream/2019/03/22/">Dissonance</a>

  695.           </li>

  696. 

  697.           <li>

  698.             <a href="/david/stream/2019/03/15/">Reconnaissance</a>

  699.           </li>

  700. 

  701.           <li>

  702.             <a href="/david/stream/2019/03/08/">Lecture</a>

  703.           </li>

  704. 

  705.           <li>

  706.             <a href="/david/stream/2019/03/01/">Journaux</a>

  707.           </li>

  708. 

  709.           <li>

  710.             <a href="/david/stream/2019/02/22/">Écriture</a>

  711.           </li>

  712. 

  713.           <li>

  714.             <a href="/david/stream/2019/02/15/">Kyriarchie</a>

  715.           </li>

  716. 

  717.           <li>

  718.             <a href="/david/stream/2019/02/08/">Mots-serrures</a>

  719.           </li>

  720. 

  721.           <li>

  722.             <a href="/david/stream/2019/02/01/">Sans voie</a>

  723.           </li>

  724. 

  725.           <li>

  726.             <a href="/david/stream/2019/01/25/">Auto-diagnostic</a>

  727.           </li>

  728. 

  729.           <li>

  730.             <a href="/david/stream/2019/01/18/">Agilité</a>

  731.           </li>

  732. 

  733.           <li>

  734.             <a href="/david/stream/2019/01/11/">Métaphores</a>

  735.           </li>

  736. 

  737.           <li>

  738.             <a href="/david/stream/2019/01/04/">Balbutiements</a>

  739.           </li>

  740. 

  741.       </ul>

  742. 

  743.     <p>

  744.       Voici quelques articles choisis :

  745.       <a href="/david/blog/2019/faire-equipe/" title="Accéder à l’article complet">Faire équipe</a>,

  746.       <a href="/david/blog/2018/bivouac-automnal/" title="Accéder à l’article complet">Bivouac automnal</a>,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  761.     </p>

  762.     <p>

  763.       On peut <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">échanger par courriel</a>. Si éventuellement tu souhaites que l’on travaille ensemble, tu devrais commencer par consulter le <a href="http://larlet.com">profil dédié à mon activité professionnelle</a> et/ou contacter directement <a href="http://scopyleft.fr/">scopyleft</a>, la <abbr title="Société coopérative et participative">SCOP</abbr> dont je fais partie depuis six ans. Je recommande au préalable de lire <a href="/david/blog/2018/cout-site/" title="Attention ce qui va suivre peut vous choquer">combien coûte un site</a> et pourquoi je suis plutôt favorable à une <a href="/david/pro/devis/" title="Discutons-en !">non-demande de devis</a>.

  764.     </p>

  765.     <p>

  766.       Je ne traque pas ta navigation mais mon

  767.       <abbr title="Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33.184162340">hébergeur</abbr>

  768.       conserve des logs d’accès.

  769.     </p>

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