Glossary Index

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Showing 1–50 of 269 terms.
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269 terms
Fallback alignment
In CSS Box Alignment, a fallback alignment is specified in order to deal with cases where the requested alignment cannot be fulfilled.
Falsy
A falsy (sometimes written falsey) value is a value that is considered false when encountered in a Boolean context.
Favicon
A favicon (favorite icon) is a tiny icon included along with a website, which is displayed in places like the browser's address bar, page tabs and bookmarks menu.
Feature Flag
A feature flag selects whether a code path or capability is enabled for a particular environment or audience.
Federated identity
A federated identity system is one in which an identity provider (IdP) acts as an intermediary between users and relying parties, enabling a user to use a single set of credentials to authenticate with a number of different relying parties.
Fencing Token
An increasing ownership token that lets a protected resource reject operations from stale lock holders.
Fetch directive
CSP fetch directives are used in a Content-Security-Policy header and control locations from which certain resource types may be loaded.
Fetch metadata request header
A fetch metadata request header is an HTTP request header that provides additional information about the context from which the request originated.
fgetcsv()
fgetcsv() — Gets line from file pointer and parse for CSV fields.
field-sizing
The field-sizing CSS property enables you to control the sizing behavior of elements that are given a default preferred size, such as form control elements.
File()
The File() constructor creates a new File object instance.
File.lastModified
The lastModified read-only property of the File interface provides the last modified date of the file as the number of milliseconds since the Unix epoch (January 1, 1970 at midnight).
FileReader.readAsArrayBuffer()
The readAsArrayBuffer() method of the FileReader interface is used to start reading the contents of a specified Blob or File.
FileReader.readAsDataURL()
The readAsDataURL() method of the FileReader interface is used to read the contents of the specified Blob or File.
FileReader.readAsText()
The readAsText() method of the FileReader interface is used to read the contents of the specified Blob or File.
file_put_contents()
file_put_contents() — This function is identical to calling fopen, fwrite and fclose successively to write data to a file.
fill
The fill CSS property defines how SVG text content and the interior canvas of SVG shapes are filled or painted.
fill-opacity
The fill-opacity CSS property defines the opacity of the painting operation (color, gradient, pattern, etc.) applied to SVG shapes or text content elements to fill the element.
fill-rule
The fill-rule CSS property defines the rule used to determine which parts of the SVG shape's canvas are included inside a shape to be filled.
filter
The filter CSS property applies graphical effects like blur or color shift to an element.
filter_block_content()
filter_block_content(): Filters and sanitizes block content to remove non-allowable HTML from parsed block attribute values.
filter_block_kses()
filter_block_kses(): Filters and sanitizes a parsed block to remove non-allowable HTML from block attribute values.
filter_block_kses_value()
filter_block_kses_value(): Filters and sanitizes a parsed block attribute value to remove non-allowable HTML.
filter_default_metadata()
filter_default_metadata(): Filters into default_{$object_type}_metadata and adds in default value.
Fingerprinting
Fingerprinting is a practice in which websites identify a particular browser (and by extension, a particular user) by collecting and combining distinguishing features of the browser and underlying operating system.
Firewall
A firewall is a system that filters network traffic.
First-class function
A programming language is said to have First-class functions when functions in that language are treated like any other variable.
First Contentful Paint (FCP)
First Contentful Paint (FCP) is a measure of when the browser renders its first DOM content, providing user feedback that the page is loading.
First CPU idle
First CPU Idle measures when a page is minimally interactive, or when the window is quiet enough to handle user input.
First Meaningful Paint (FMP)
First Meaningful Paint (FMP) is the paint after which the biggest above-the-fold layout change has happened and web fonts have loaded.
First Paint (FP)
First Paint is the time between navigation and when the browser first renders pixels to the screen, rendering anything that is visually different from the default background color of the body.
Flex
flex is a value of the CSS display property.
flex-basis
The flex-basis CSS property sets the initial main size of a flex item.
flex-direction
The flex-direction CSS property sets how flex items are placed in the flex container defining the main axis and the direction (normal or reversed).
flex-flow
The flex-flow CSS shorthand property specifies the direction of a flex container, as well as its wrapping behavior.
flex-grow
The flex-grow CSS property sets the flex grow factor, which specifies how much of the flex container's positive free space, if any, should be assigned to the flex item's main size.
flex-shrink
The flex-shrink CSS property sets the flex shrink factor of a flex item.
flex-wrap
The flex-wrap CSS property sets whether flex items are forced onto one line or can wrap onto multiple lines.
Flexbox
Flexbox is the commonly-used name for the CSS flexible box layout module, a layout model for displaying items in a single dimension — as a row or as a column.
Flex container
A flexbox layout is defined using the flex or inline-flex values of the display property on the parent item.
Flex item
The direct children of a Flex Container (elements with display: flex or display: inline-flex set on them) become flex items.
float
The float CSS property places an element on the left or right side of its container, allowing text and inline elements to wrap around it.
flood-color
The flood-color CSS property defines the color of the current filter primitive subregion in feFlood and feDropShadow elements within a filter.
flood-opacity
The flood-opacity CSS property defines the opacity of the current filter primitive subregion in feFlood and feDropShadow elements within a filter.
Flow relative values
In CSS, flow relative values are directional keyword values relative to an element's block and inline axes.
FluentBoards
FluentBoards is a WordPress project management plugin that organizes work into boards, stages, and tasks.
FluentBoards Board
A board is a workspace for related tasks and the stages used to track them.