{"json_modified": "2014-09-12T04:32:26.333198", "slug": "Web/JavaScript/Reference/Scope_Cheatsheet", "tags": ["scope", "variables", "hoisting", "Reference", "Advanced", "R\u00e9f\u00e9rence", "JavaScript"], "locale": "fr", "title": "M\u00e9mo sur les port\u00e9es", "translations": [{"title": "Scope Cheatsheet", "url": "/en-US/docs/Web/JavaScript/Reference/Scope_Cheatsheet", "tags": ["scope", "variables", "hoisting"], "summary": "", "localization_tags": [], "locale": "en-US", "last_edit": "2014-03-09T18:13:46", "review_tags": []}], "modified": "2014-09-12T04:32:25", "label": "M\u00e9mo sur les port\u00e9es", "localization_tags": [], "url": "/fr/docs/Web/JavaScript/Reference/Scope_Cheatsheet", "last_edit": "2014-09-12T04:32:23", "summary": "JavaScript, avec les extensions Mozilla, poss\u00e8de des instructions <strong><code>var</code></strong> dont la port\u00e9e est celle de la fonction et des instructions <strong><code>let</code></strong> dont la port\u00e9e est celle du bloc. Ces instructions, combin\u00e9es \u00e0 l'\u00e9l\u00e9vation (<em>hoisting</em> en anglais) et au comportement dynamique de JavaScript font que les notions de port\u00e9es r\u00e9servent quelques surprises.", "sections": [{"id": "var", "title": "var"}, {"id": "const", "title": "const"}, {"id": "let", "title": "let"}, {"id": "function", "title": "function"}, {"id": ".C3.89l.C3.A9vation_(Hoisting)", "title": "\u00c9l\u00e9vation ( Hoisting )"}, {"id": "Param.C3.A8tres", "title": "Param\u00e8tres"}, {"id": "with_capture_les_affectations_mais_pas_les_d.C3.A9clarations_var", "title": "with capture les affectations mais pas les d\u00e9clarations var"}, {"id": "eval_peut_capturer_les_affectations_mais_pas_les_d.C3.A9clarations_var", "title": "eval peut capturer les affectations mais pas les d\u00e9clarations var"}, {"id": "for_.3A_d.C3.A9finition_du_pas_d'it.C3.A9ration", "title": "for : d\u00e9finition du pas d'it\u00e9ration"}, {"id": "Les_variables_de_catch_ont_une_port.C3.A9e_de_bloc", "title": "Les variables de catch ont une port\u00e9e de bloc"}, {"id": "Instructions_et_expressions_let", "title": "Instructions et expressions let"}, {"id": ".C3.89tranget.C3.A9_des_fonctions", "title": "\u00c9tranget\u00e9 des fonctions"}, {"id": "Pr.C3.A9dicats_de_s.C3.A9lecteur_E4X", "title": "Pr\u00e9dicats de s\u00e9lecteur E4X"}], "id": 127019, "review_tags": []}