Rendering & JavaScript

Client-side rendering (CSR) is a technique in which JavaScript builds the HTML of a page in the browser.

Dynamic rendering is, in the SEO sense, a setup in which a server detects crawlers and serves them a server-rendered HTML version, while …

Edge SEO, also called serverless SEO, means, according to Patrick Stox, making technical SEO changes at the CDN or in an edge worker …

Hydration is the step in which JavaScript in the browser attaches event handlers and application state to HTML that a server already …

Incremental static regeneration (ISR) is a caching strategy that serves pre-rendered static pages and regenerates them in the background …

Prerendering means rendering a page ahead of time instead of when someone requests it.

In SEO and web development, rendering is the process in which a browser or crawler turns HTML, CSS, and JavaScript into the finished page …

Server-side rendering (SSR) means the server generates the HTML of a page when a request arrives and sends the finished markup to the …

Static site generation (SSG) means a site's HTML files are created once when the site is built, not when a visitor requests a page.

AJAX (Asynchronous JavaScript and XML) is a technique where a web page requests data from the server in the background and updates only …

Hash URLs with #!, also called hashbang URLs, are an address form from the early AJAX era in which a JavaScript application stores the …

The History API is a browser interface through which JavaScript reads and changes the session history of a tab.

JavaScript frameworks such as React, Angular, and Vue are toolkits for building interactive web interfaces from reusable components.

JavaScript SEO is the work of making sure search engines can crawl, render, and index content, links, and metadata that a page creates or …

Lazy loading means that non-critical resources such as images, iframes or scripts load only when they are needed, for example when they …

The shadow DOM is an encapsulated subtree of the DOM that is attached to a regular element on a page.

A single-page application (SPA) is a web app that loads a single HTML document and then updates the content with JavaScript when another …

Web components are a set of browser standards for creating reusable custom HTML elements with their own behavior and styling.

Blocked resources are CSS, JavaScript, image, and other files that a crawler is not allowed to fetch while rendering a page, usually …

The Document Object Model (DOM) is the structure a browser builds in memory from a web page.

A headless browser is a web browser that runs without a visible user interface and is controlled through code or the command line.

Raw HTML is the source code of a web page as the server delivers it in the HTTP response, before a browser or crawler has run any …

Render-blocking resources are files, mostly CSS and JavaScript, that the browser has to load and process before it can display page content.

Rendered HTML is the markup of a page after JavaScript has run, in other words the current state of the DOM.

The Web Rendering Service (WRS) is the component of Google Search that renders pages and executes their JavaScript.