{"id":8794,"date":"2024-07-25T10:46:13","date_gmt":"2024-07-25T10:46:13","guid":{"rendered":"https:\/\/thecodest.co\/?post_type=dictionary&#038;p=8794"},"modified":"2024-07-25T10:46:14","modified_gmt":"2024-07-25T10:46:14","slug":"pourquoi-le-javascript-est-monofilaire","status":"publish","type":"dictionary","link":"https:\/\/thecodest.co\/fr\/dictionary\/why-javascript-is-single-threaded\/","title":{"rendered":"Pourquoi le Javascript est monot\u00e2che"},"content":{"rendered":"<h1> Pourquoi le Javascript est monot\u00e2che<\/h1>\n<p><a href=\"https:\/\/thecodest.co\/fr\/dictionary\/why-is-javascript-so-popular\/\">JavaScript<\/a> est un langage de programmation populaire qui est largement utilis\u00e9 dans les domaines suivants <a href=\"https:\/\/thecodest.co\/fr\/dictionary\/what-is-full-stack-web-development\/\">d\u00e9veloppement web<\/a>. L'une des principales caract\u00e9ristiques du JavaScript est qu'il est monot\u00e2che, ce qui signifie qu'il ne peut ex\u00e9cuter qu'un seul morceau de <a href=\"https:\/\/thecodest.co\/fr\/dictionary\/what-is-code-refactoring\/\">code<\/a> \u00e0 la fois. Cela peut parfois \u00eatre per\u00e7u comme une limitation, en particulier par rapport \u00e0 d'autres langages qui prennent en charge le multithreading. Cependant, il y a plusieurs raisons pour lesquelles JavaScript est monot\u00e2che, et la compr\u00e9hension de ces raisons peut aider les d\u00e9veloppeurs \u00e0 travailler plus efficacement avec le langage.<\/p>\n<p>L'une des principales raisons pour lesquelles JavaScript est monot\u00e2che est qu'il s'agit \u00e0 l'origine d'un langage con\u00e7u pour l'ordinateur de bureau. <a href=\"https:\/\/thecodest.co\/fr\/blog\/find-your-ideal-stack-for-web-development\/\">web<\/a>. Lorsque JavaScript a \u00e9t\u00e9 cr\u00e9\u00e9 par Brendan Eich en 1995, il \u00e9tait destin\u00e9 \u00e0 \u00eatre un langage de script l\u00e9ger pouvant \u00eatre facilement int\u00e9gr\u00e9 dans des pages web. \u00c0 l'\u00e9poque, la plupart des ordinateurs \u00e9taient des machines \u00e0 c\u0153ur unique, et il n'\u00e9tait donc pas n\u00e9cessaire que JavaScript prenne en charge le multithreading. Par cons\u00e9quent, le langage a \u00e9t\u00e9 con\u00e7u pour \u00eatre monot\u00e2che afin de rester simple et facile \u00e0 utiliser.<\/p>\n<p>Une autre raison pour laquelle JavaScript est monot\u00e2che est qu'il s'ex\u00e9cute dans une seule boucle d'\u00e9v\u00e9nements. La boucle d'\u00e9v\u00e9nements est un m\u00e9canisme qui permet \u00e0 JavaScript de g\u00e9rer des op\u00e9rations asynchrones, telles que la recherche de <a href=\"https:\/\/thecodest.co\/fr\/blog\/app-data-collection-security-risks-value-and-types-explored\/\">donn\u00e9es<\/a> \u00e0 partir d'un serveur ou en r\u00e9pondant \u00e0 une entr\u00e9e de l'utilisateur. Lorsqu'une op\u00e9ration asynchrone est lanc\u00e9e, elle est ajout\u00e9e \u00e0 une file d'attente et la boucle d'\u00e9v\u00e9nements traite ces op\u00e9rations une par une. Cela garantit que le code JavaScript est ex\u00e9cut\u00e9 de mani\u00e8re pr\u00e9visible et coh\u00e9rente, ce qui permet d'\u00e9viter les bogues et d'am\u00e9liorer les performances.<\/p>\n<p>En outre, la nature monot\u00e2che du JavaScript permet d'\u00e9viter les conditions de course et autres probl\u00e8mes de concurrence qui peuvent survenir dans les environnements multithreads. Dans un syst\u00e8me multithread, plusieurs threads peuvent acc\u00e9der \u00e0 des donn\u00e9es partag\u00e9es et les modifier simultan\u00e9ment, ce qui entra\u00eene un comportement impr\u00e9visible et des probl\u00e8mes difficiles \u00e0 d\u00e9boguer. En limitant JavaScript \u00e0 un seul thread, les d\u00e9veloppeurs peuvent plus facilement raisonner sur leur code et \u00e9viter ce type de probl\u00e8mes.<\/p>\n<p>Malgr\u00e9 sa nature monot\u00e2che, le JavaScript dispose de moyens pour g\u00e9rer les op\u00e9rations simultan\u00e9es. Par exemple, les d\u00e9veloppeurs peuvent utiliser les web workers pour d\u00e9charger les t\u00e2ches \u00e0 forte intensit\u00e9 de CPU sur des threads distincts, ce qui permet au thread principal de rester r\u00e9actif. En outre, les syst\u00e8mes modernes de <a href=\"https:\/\/thecodest.co\/fr\/dictionary\/what-is-the-difference-between-node-js-and-other-javascript-frameworks\/\">Cadres JavaScript<\/a> et les biblioth\u00e8ques fournissent souvent des outils de gestion des op\u00e9rations asynchrones, tels que les promesses et la syntaxe async\/await, qui facilitent le travail avec du code asynchrone dans un environnement monot\u00e2che.<\/p>\n<p>En conclusion, JavaScript est monot\u00e2che pour diverses raisons, notamment ses origines en tant que langage de script Web, la conception de la boucle d'\u00e9v\u00e9nements et le d\u00e9sir d'\u00e9viter les probl\u00e8mes de concurrence. Bien que cela puisse parfois \u00eatre consid\u00e9r\u00e9 comme une limitation, la nature monot\u00e2che de JavaScript pr\u00e9sente des avantages en termes de simplicit\u00e9, de pr\u00e9visibilit\u00e9 et de facilit\u00e9 de d\u00e9bogage. En comprenant pourquoi le JavaScript est monot\u00e2che et comment travailler avec ses limitations, les d\u00e9veloppeurs peuvent \u00e9crire un code plus efficace et plus fiable dans ce langage.<\/p>","protected":false},"excerpt":{"rendered":"<p>Why Javascript Is Single Threaded JavaScript is a popular programming language that is widely used in web development. One of the key characteristics of JavaScript is that it is single-threaded, meaning that it can only execute one piece of code at a time. This can sometimes be seen as a limitation, especially when compared to [&hellip;]<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-8794","dictionary","type-dictionary","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Why Javascript Is Single Threaded - The Codest<\/title>\n<meta name=\"description\" content=\"JavaScript, a popular programming language for web development, is single-threaded for simplicity and predictability. 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