Open CSS File

To complete the launch of the project as an open source, we have left to include some more documentation (Contributing guidelines and Code of conduct). We have decided to leave this at the moment and come back to it later (this is about documentation so the writing can be split between the two of us) So, we preferred to continue developing the next feature. As we mentioned, we want to support preview display of CSS file by opening it in a new tab (when clicking on "open new tab" button). We saw that CSS file can be referenced with a full (web page) URL or with a path relative to the current web page (learned this from HERE ). Examples: A full URL link : < link rel ="stylesheet" href ="https://www.w3schools.com/html/styles.css" > A CSS file located in the HTML folder on the current web site: <link rel="stylesheet" href="/html/styles.css"> A CSS file located in the same folder as the current page:...