HTML ↔ Markup Lang to express Web Page struct/content
Source: developer.mozilla.org/en
aka HTML, HyperText-Markup-Language

Flow Content
any HTMLElement to go inside <body\> via Normal Flow
HTML Entity
string to display reserved invisible chars in HTML
Sources: Entity - MDN Web Docs Glossary: Definitions of Web-related terms | MDN HTML Standard
Metadata Content
HTMLElement to mod presentation/behavior of Document & provides additional info
References
HTTP↔ Network Protocol to transmit/access data over web i.e. HTMLElectron↔ JS Framework to build desktop Apps with JS, HTML & CSS, embed in Chromium & Node.jsCSS↔ Stylesheet Language to express style & layout of (HTML) via Style RuleWeb Platform↔ Collection of Open Standard Technologies incl HTML, CSS, ECMAScript & Web Assembly, mainly for Browser Runtime<pre>↔ Element to display preformatted text (as literally written in HTML Source Code)Layout engine↔ Browser engine to interpret HTML, CSS & JS, & render pixels to screenHTML Entity↔stringto display reserved invisible chars in HTML<body>↔ Root Sectioning Element to hold Document Body of HTMLDocument/public/index.html↔ root HTML Web Page to serve App Component, entry point for BrowserDOM Tree↔ Tree-like structure ofNode, autogen by HTMLdocumentReact.Fragment↔ empty React placeholder container w/o "physical" Element add to final HTMLjQuery↔ Lib to simplify DOM API manipulation via$wrapper around HTMLJSX↔ Syntactic Sugar to mix HTML inside JS, later Transpile toReact.createElement()SSG↔ (process) to Pre-render HTML Static Content at build time for Thin Client<iframe>↔ Inline Frame Inline Element to embed another HTML page into Web PagesrcDoc↔ Attribute to load HTML static markup asStringinto<iframe\>Data URI↔ Scheme to encode data asstring& embed into HTMLPre-render↔ (feat) to render HTML in advance for perf & SEO/src/main.tsx↔ root HTML for Vite TS projectSandbox↔ Isolated environment/container for Runtime Environment/HTML/etcHTMLElement↔ Interface Object to repElementin HTMLBlock Element↔ 📦 Element to stack as blocks (default) & fill width of HTML ↔ HTML Entity to escape non-breaking whitespace in HTML - to preserve whitespace as content, prevent collapse