When a URL does not specify a filename at the end (like "https://www.w3schools.com/"), the server just adds a default filename, such as "index.html", "index.htm", "default.html", or "default.htm". If your server is configured only with "index.html" as the default filename, your file must be named "index.html", and not "default.html".

An important read for academics and policy-makers alike, Hard Choices, Soft Law asserts that voluntary standards, or 'soft' law, are an important supplement to 

This means that if you have separate ID and class-based style declarations that both declare the same property for the same html element, the value from the ID selector is the one that is going to be applied. Id Attribute The id attribute is used to label sections or parts of your HTML document. You may only use the same id once per page, so save it for important major sections of your page. Additionally, the id selector in CSS has a high specificity level and therefore overrules other things (like the class selector). 2018-11-02 Styling an HTML Document. There are three ways to add CSS to an HTML document:. With an external style sheet,; With the style attribute on any HTML element, a tactic referred to as inline CSS,; With an internal style sheet.; The