The same-origin policy is the browser security rule that stops scripts from one origin reading data from another unless that origin permits…
Selenium is an open-source framework for automating web browsers through the WebDriver protocol, widely used for cross-browser web testing.
Semantic HTML is the practice of marking up web content with elements that describe its meaning, improving accessibility, SEO and maintainability.
Semantic structure is the use of meaningful HTML elements, headings and landmarks so assistive technologies can understand and navigate a web page.
Server-sent events are a web API that lets a server push a continuous stream of text messages to the browser over one…
A service worker is a background script in browser JavaScript that intercepts network requests, enabling offline pages, caching and push messages.
A skip link is an in-page link at the start of a web page that lets keyboard and screen reader users jump…
An SPA (single-page application) is a web application that loads one HTML document and updates its views with JavaScript instead of full…
Specificity in CSS is the weight a browser computes for each selector to decide which conflicting declaration applies to an element.
Speed Index is a lab metric in web performance that measures how quickly the visible content of a page is painted during…
SSG, or static site generation, builds every page of a web application into ready HTML files at build time instead of rendering…
SSR (server-side rendering) generates the HTML of a web application on the server for each request, so pages arrive ready to display.
A static asset in web architecture is a file such as an image, stylesheet, script or font that is served unchanged to…