. Permitted parents: Any element that accepts flow content (WHATWG). Type “nbsp” to add a single space 2. Asking for help, clarification, or responding to other answers. HTML HTML Tag Reference HTML Browser Support HTML Event Reference HTML Color Reference HTML Attribute Reference HTML Canvas Reference HTML SVG Reference HTML Character Sets Google Maps Reference CSS CSS Reference CSS Browser Support CSS Selector Reference Bootstrap 3 Reference Bootstrap 4 Reference W3.CSS Reference Icon Reference Sass Reference The level of stress that a particular piece of content has is given by its number of ancestor em elements. Chrome DevTools is a set of web developer tools built directly into the Google Chrome browser. The first thing to do is to request from the Release Engineering team (“RelEng”) that they disable automation associated to the android-l10n project you want to remove. x-tag dramatically simplifies advanced HTML elements for web apps - like a tabbox, tree, special input, etc. p, label { font: 1rem 'Fira Sans', sans-serif; } input { margin: .4rem; } Web resources about - Simple HTML tags & reference document - mozilla.support.thunderbird Wikipedia talk:Reference desk/Guidelines/Medical advice - Wikipedia, the free encyclopedia I disagree with this implication that this section of the guideline represents the consensus. Learn how your comment data is processed. See this issuefor more information. Mozilla Developer Network (now MDN Web Docs) is great, probably the best Web development reference site from them all. . There are many different kinds of tags, and each one has a different purpose.