Look for a rule Filter the rules ( Current filters: 13 rules ) Topics Content e-commerce Forms Identification and contact Images and media Internationalization Links Navigation Newsletter Personal information Presentation Security Server and performance Structure and code Project phases Conception Development Editorial Keywords Accessibility Basics Eco-conception Mobile Privacy SEO Reset filters Copy URL Rule n°211 The address of the website and of its subdomains works with and without a www prefix. #Development #Eco-conception #Server and performance Rule n°212 The website’s root contains instructions for web crawlers. #Basics #Development #Eco-conception #SEO #Server and performance Rule n°213 The website provides a sitemap file listing the content to be crawled. #Basics #Development #Eco-conception #Editorial #SEO #Server and performance Rule n°214 The server does not force redirects from the desktop version to the mobile version or application. #Development #Mobile #Server and performance Rule n°215 The server sends a 404 HTTP error code for resources not found #Development #Eco-conception #SEO #Server and performance Rule n°216 The server sends a customised 404 Not found error page #Basics #Accessibility #Conception #Development #Server and performance Rule n°217 The server sends a customised 403 “Forbidden” error page. #Basics #Accessibility #Conception #Development #Server and performance Rule n°218 The main navigation menu is displayed on custom error pages. #Accessibility #Conception #Development #Server and performance Rule n°219 The server transmits compressed contents to the clients which accept them. #Basics #Development #Eco-conception #Server and performance Rule n°220 The server sends information to enable the caching of contents #Basics #Development #Eco-conception #Server and performance Rule n°221 Headers sent by the server contain information pertaining to the character set used #Development #SEO #Server and performance Rule n°222 Style sheets of the website are minified. #Basics #Development #Eco-conception #Server and performance Rule n°223 Scripts of the website are minified. #Basics #Development #Eco-conception #Server and performance
Rule n°211 The address of the website and of its subdomains works with and without a www prefix. #Development #Eco-conception #Server and performance
Rule n°212 The website’s root contains instructions for web crawlers. #Basics #Development #Eco-conception #SEO #Server and performance
Rule n°213 The website provides a sitemap file listing the content to be crawled. #Basics #Development #Eco-conception #Editorial #SEO #Server and performance
Rule n°214 The server does not force redirects from the desktop version to the mobile version or application. #Development #Mobile #Server and performance
Rule n°215 The server sends a 404 HTTP error code for resources not found #Development #Eco-conception #SEO #Server and performance
Rule n°216 The server sends a customised 404 Not found error page #Basics #Accessibility #Conception #Development #Server and performance
Rule n°217 The server sends a customised 403 “Forbidden” error page. #Basics #Accessibility #Conception #Development #Server and performance
Rule n°218 The main navigation menu is displayed on custom error pages. #Accessibility #Conception #Development #Server and performance
Rule n°219 The server transmits compressed contents to the clients which accept them. #Basics #Development #Eco-conception #Server and performance
Rule n°220 The server sends information to enable the caching of contents #Basics #Development #Eco-conception #Server and performance
Rule n°221 Headers sent by the server contain information pertaining to the character set used #Development #SEO #Server and performance
Rule n°222 Style sheets of the website are minified. #Basics #Development #Eco-conception #Server and performance
Rule n°223 Scripts of the website are minified. #Basics #Development #Eco-conception #Server and performance
Rule n°211