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A sidebar, typically positioned on the left or right side of a website or app, is a vertical component that contains supplemental information to enrich a webpage’s primary content.

An array is an ordered, random-access collection of data. This data can be either primitive or object, depending on the coding language.

RGB, an acronym for Red, Green, Blue, is a color model that screen displays use to represent various colors.

Real-Time Streaming Protocol (RTSP) is a standardized network protocol for transmitting real-time multimedia data like audio and video.

The front-end refers to the visual and interactive part of a website or application that users directly interact with.

A pixel (px) is the smallest unit of measure in a digital image or display, representing a single point of color or light.

A Hypertext Markup Language (HTML) tag is a code snippet that defines and describes the structure and content of web pages.

A CMS field used in Collections. Just like a reference field, the multi-reference field lets you reference other Collections in your site. But it’s even more powerful, as it lets you reference multiple items within a Collection instead of just 1 item.

Bottom padding is the space between the bottom of an element and its border.

A valid CSS pseudo-class is a keyword that enables styling HTML elements based on their state or position in the document structure or web page.

A downloadable ZIP file that contains your Webflow site's HTML, CSS, JS, and image files.

The "height: auto" CSS property automatically adjusts an element’s height based on its content.

The third tab in the right-side panel where you can rename element classes, preview your class and tag styles, search for classes and tags, and delete any classes that aren’t in use.

Any element that is further up the element hierarchy of the document tree. For example, the Body element is the ancestor of all elements on the Designer canvas.

Syntax is the name for the rules specifying a programming language's structure and formatting.

Bad neighborhoods are groups of websites that search engines have downgraded because they violate search engine guidelines.

Idempotency is a computing principle where multiple applications of a function or operation produce the same result as a single execution.

An individual item within a Collection. For example, in a “Blog Posts” Collection, the Collection items are individual blog posts.

Display properties operate like instructions that tell a browser how to display the different parts of a webpage. You can customize an element’s appearance and layout by changing its display property.

A ligature in typography groups adjacent letters or characters into one glyph.

Resolution is a metric measuring clarity and detail through the number of pixels displayed on a screen or used to render an image.

A plugin, also called an add-on or extension, is a software component that enhances the host or browser or application by adding new features or capabilities to it.

A pseudo-class that allows you to change the styles of an element when it is hovered, pressed, or focused.

A folder is a subdirectory of your site's root folder for organizing web pages.

A domain, or domain name, is the unique address that directs to a website on the internet.

A parameter is a programming variable or value that transfers data between functions.

The span tag is used to style inline-text.

An attribute in HTML is a term inside an opening tag of an element, such as a font or color, that provides additional information about the element.

All elements on the page targeted by the same selector.

A section of the Add panel that houses form elements like inputs, checkboxes, and radio buttons.

A Webflow component that displays a pane of content associated with a tab menu button.

A Webflow plan that applies to your entire Workspace.

A Uniform Resource Identifier (URI) is a string of characters identifying an online resource.

Return on investment (ROI) is a metric evaluating the profitability or gain of a venture.

The color-coded borders of elements you'll see in the Webflow Designer.

Synchronous programming refers to sequentially executed operations.

An inline frame is an HTML element that embeds an HTML document within another webpage.

Shared Workspace templates are templates made from your own sites. They can help you create sites with similar layouts and increase your efficiency when designing. Your Workspace members will also have access to your shared Workspace template(s).

Compiling is the process of converting code from a high-level programming language into a low-level language that computers can understand.

The min-height CSS property defines an element’s minimum height.

Behavioral targeting is a marketing technique that leverages user data to deliver personalized ads to drive conversions.

A child element is an element nested within a parent element in a hierarchy.

A buffer is a temporary storage area that holds data while transferring it between different components or systems.

Right margin is a CSS property that defines the space between the right edge of an element and its surroundings.

In coding, a constant is a fixed value that can’t change, no matter where it appears or what the program uses it for.

Cookies are small text files sent by a website to a user’s web browser that enhance their browsing experience by remembering site preferences and activities.

JSON, short for JavaScript Object Notation, is a human-readable, lightweight format for recording, storing, and exchanging data.

To move backward one step while making changes to a Webflow site.

A slug, also known as a URL slug or a website slug, is descriptive text that appears at the end of a URL and identifies a web page.

The order in which a Webflow site's CSS styles flow from desktop to mobile breakpoints.

Columns let you create sections of content that sit side by side on your website, like the columns in newspapers. You can choose how many columns you want and their widths. You can also control how they display on smaller screens — such as stacking them.

The last time your site was published.

The <canvas> tag in HTML5 creates a container for dynamic graphics and image rendering on a webpage.

The currently selected element.

In CSS, flex-order is a property that allows you to manipulate the default source order of the items within a flex container. Flex-order is especially useful when you want content to display differently on mobile than on desktop.

A browser, or web browser, is a software program that allows users to access, navigate, and interact with websites on the internet.

Content you create once, then publish in many different places across your website. As you update this content in the CMS, it automatically updates wherever it exists on your site, making it convenient to create and manage larger websites.

A robots.txt file instructs search engine crawlers which webpages and sections they can or can't crawl and index.

A bottom bar is a navigation bar at the bottom of an app or webpage.

Inheritance describes a principle where child elements adopt the style properties of parent elements.

A navigational aid that displays in the bottom of the Webflow Designer to help you keep track of the element you're interacting with in relation to its hierarchy.

JavaScript is a programming language web developers use to create dynamic interactions and effects for web pages and applications.

Flex-direction is a CSS property that defines the main axis and direction of flex items, dictating the arrangement of the items within a flex container.

A CSS descriptor sets specific properties and values of an at-rule (@-rule) element, dictating its appearance and behavior on a web page.

A lightbox displays content in a popup or modal window on top of a web page’s main content.

The most flexible display property in CSS is the aptly named display: flex, which allows you to create flexible layouts with elements that you can align and distribute vertically or horizontally.

A list is a Webflow element that displays multiple pieces of content in a structured, visually appealing way. The individual elements that make up the list are called list items.

A custom font is any non-system-default typeface you manually upload to your website.

A form element that lets website visitors submit data to your form handler.

A change that has been made in the Webflow Editor but will not appear on the live website until it’s published. You can track any unpublished changes on the bottom right of the Editor toolbar.

Defines how tall an element can be. This can be defined in absolute terms (pixels) or relative terms (ems, rems, percentages, viewport-height, or viewport-width).

A visible "Made in Webflow" badge displayed in the bottom right corner of Webflow sites on Starter plans.

Search Engine Optimization (SEO) is a collection of strategies to enhance a website’s ranking and visibility on search engines.

A navbar, or navigation bar, is an interactive user element with a menu or a set of links to a website’s main sections.

In programming, a deep copy is a replica of an object that doesn’t share the same references as the original. That way, if you make changes to the duplicate, the original stays the same.

Lets you control how Collection items display inside a Collection list. The default layout option has each item covering the full width of the parent element. You can change this to display Collection items in 2, 3, 4, or 6 columns.

You can assign element IDs from the Element settings panel in the Designer. ID selectors are useful for HTML anchors, linking to page sections, or for custom code.

The “max-height” CSS property defines an element’s maximum height.

Display: none is a CSS property that hides website elements. This code tells the document flow to ignore the element entirely, making it invisible.

An element contained within a parent element that has display: flex set.

A flexbox property that lets you customize the alignment behavior of flex children, based on the main axis of the flex container — that is, whatever you defined as the flex-direction. Options include start, center, end, baseline, and stretch.

A method of lowering the file size of your stylesheet(s) by removing all white space from your CSS files.

Conditionals, also known as conditional statements or expressions, are coding instructions that tell a program to execute an action for a certain condition.

A form element that allows site visitors to enter multi-line data.

The first tab in the right-side panel that allows you to assign classes to elements and style them.

Authoring Tool Accessibility Guidelines (ATAG) are a layered rule-set that influence how designers and developers create a more accessible internet.

A callback function is passed as an argument to another function and executed upon completing the latter’s task.

A hit is a request to a web server from a browser for a specific resource.

A backlink, also referred to as an inbound link, is a hyperlink from one website to another website.

Third-party applications that you've given access to your personal and/or website data.

A section in the Style panel that houses CSS properties related to how typography is displayed such as font, font size and height, and align.

Color gamut describes the full range of colors a device can reproduce on its display.

A content network is a collection of websites where advertisers can pay to display digital ads.

A dropdown, or dropdown menu, is a pre-built navigation element you can add to almost any part of a website.

A typography element used for displaying multi-sentence text content.

An HTML input field, represented by the syntax <input>, is a web page element where users input data, like text and numbers.

A content management system (CMS) is a tool for creating and managing a website and its content.

A Facebook button is a clickable element on a website that allows users to connect to or share content on the social media platform.

Top margin is a CSS property that defines the space between the top edge of an element and its surroundings, such as other elements, the browser window, or the edge of a container.