{"json_modified": "2016-09-25T07:08:14.096710", "uuid": "9f91b9c0-327a-4a67-a3de-2d77a1ee6eff", "title": "Scope Cheatsheet", "url": "/en-US/docs/Archive/Web/Scope_Cheatsheet", "tags": ["scope", "hoisting", "JavaScript"], "translations": [{"uuid": "f4f9ea88-6ef8-47d9-a959-68905b749c85", "title": "M\u00e9mo sur les port\u00e9es", "url": "/fr/docs/Web/JavaScript/Reference/Scope_Cheatsheet", "tags": ["scope", "hoisting", "Reference", "Advanced", "R\u00e9f\u00e9rence", "JavaScript"], "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.", "localization_tags": [], "locale": "fr", "last_edit": "2014-09-12T04:32:23", "review_tags": []}], "modified": "2016-09-25T07:08:14", "label": "Scope Cheatsheet", "localization_tags": [], "locale": "en-US", "id": 11055, "last_edit": "2015-07-01T15:05:25", "summary": "JavaScript with Mozilla extensions has both function-scoped <strong><code>var</code></strong>s and block-scoped <strong><code>let</code></strong>s. Along with hoisting and dynamic behavior, scope in JavaScript is sometimes surprising.", "sections": [{"id": "var", "title": "var"}, {"id": "const", "title": "const"}, {"id": "let", "title": "let"}, {"id": "function", "title": "function"}, {"id": "Hoisting", "title": "Hoisting"}, {"id": "Parameters", "title": "Parameters"}, {"id": "with_captures_assignments_but_not_var_declarations", "title": "with captures assignments, but not var declarations"}, {"id": "eval_may_capture_assignments_but_not_var_declarations", "title": "eval may capture assignments, but not var declarations"}, {"id": "for_heads", "title": "for heads"}, {"id": "catch_variables_are_block-scoped", "title": "catch variables are block-scoped"}, {"id": "let_statements_and_expressions", "title": "let statements and expressions"}, {"id": "function_oddities", "title": "function oddities"}, {"id": "E4X_selector_predicates", "title": "E4X selector predicates"}], "slug": "Archive/Web/Scope_Cheatsheet", "review_tags": []}