Europa.eu is built with the following tech stack:
Document Encoding
UTF-8
UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.
Document Standards
Open Graph Protocol
The Open Graph protocol enables any web page to become a rich object in a social graph, a open protocol supported by Facebook
Twitter Cards
Twitter cards make it possible for you to attach media experiences to Tweets that link to your content.
X-UA-Compatible
Allows a website to define how a page is rendered in Internet Explorer 8, allowing a website to decide to use IE7 style rendering over IE8 rendering.
Cascading Style Sheets
Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML
Javascript Defer
The defer attribute gives a hint to the browser that the script does not create any content so the browser can optionally defer interpreting the script. This can improve performance by delaying execution of scripts until after the body content is parsed and rendered.
HTML5 DocType
The DOCTYPE is a required preamble for HTML5 websites.
HTML 5 Specific Tags
This page contains tags that are specific to an HTML 5 implementation.
Content Type Options
Used to disable MIME-sniffing for a particular HTTP response.
Strict Transport Security
The HTTP Strict-Transport-Security (HSTS) header instructs the browser to only use https.
Mobile
Viewport Meta
This page uses the viewport meta tag which means the content may be optimized for mobile content.
SSL Certificates
HSTS
Forces browsers to only communicate with the site using HTTPS.