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The backdrop-filter CSS property lets you apply graphical effects such as blurring or color shifting to the area behind an element.
The backface-visibility CSS property sets whether the back face of an element is visible when turned towards the user.
The background CSS shorthand property sets all background style properties at once, such as color, image, origin, size, and repeat method.
The background-attachment CSS property sets whether a background image's position is fixed within the viewport, or scrolls with its containing block.
The background-blend-mode CSS property sets how an element's background images should blend with each other and with the element's background color.
The background-clip CSS property sets whether an element's background extends underneath its border box, padding box, or content box.
The background-color CSS property sets the background color of an element.
The background-image CSS property sets one or more background images on an element.
The background-origin CSS property sets the background's origin: from the border start, inside the border, or inside the padding.
The background-position CSS property sets the initial position for each background image.
The background-position-x CSS property sets the initial horizontal position for each background image.
The background-position-y CSS property sets the initial vertical position for each background image.
The background-repeat CSS shorthand property sets how background images are repeated.
The background-size CSS property sets the size of the element's background image.
Flow control that slows upstream production when downstream processing cannot keep up.
Backward compatibility means a newer version continues to support the existing interfaces and stored data promised by the project.
Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by transforming it into a radix-64 representation.
base64_encode() — Encodes data with MIME base64.
Baseline identifies the availability of web platform features across popular browsers, including APIs, CSS properties, and JavaScript syntax.
A baseline is an imaginary line along the inline axis of a line box along which individual glyphs of text are aligned.
The baseline-shift CSS property repositions the dominant-baseline of a text element relative to the dominant-baseline of its parent text content element.
The baseline-source CSS property defines which baseline to use when inline-level boxes have multiple possible baselines, such as multi-line inline blocks or inline flex containers.
basename() — Returns trailing name component of path.
A BCP 47 language tag is a string of characters that precisely specifies a human language in terms of the basic language, but also optionally the writing system and dialect.
A web beacon is a small object, such as a 1 pixel gif, embedded in markup, used to communicate information back to the web server or to third-party servers.
before_last_bar(): Removes last item on a pipe-delimited string.
A beta release is a prerelease build distributed for testing before the intended stable release.
The back/forward cache, or bfcache, is a performance-enhancing feature available in modern browsers that enables instant back and forward navigation between previously-visited pages.
BiDi (BiDirectional) describes a document that contains both right-to-left (RTL) and left-to-right (LTR) text.
BigInt values represent integer values which are too high or too low to be represented by the number primitive.
The BigInt() function returns primitive values of type BigInt.
The BigInt.asIntN() static method truncates a BigInt value to the given number of least significant bits and returns that value as a signed integer.
The BigInt.asUintN() static method truncates a BigInt value to the given number of least significant bits and returns that value as an unsigned integer.
The toLocaleString() method of BigInt values returns a string with a language-sensitive representation of this BigInt.
The toString() method of BigInt values returns a string representing the specified BigInt value.
In programming, a binding is an association of an identifier with a value.
Bitwise flags are sets of variables, usually simple number values, which can be used to enable or disable specific usages or features of a method or other code structure.
Blink is an open-source browser rendering engine developed by Google as part of Chromium (and therefore part of Chrome as well).
The Blob() constructor returns a new Blob object.
The arrayBuffer() method of the Blob interface returns a Promise that resolves with the contents of the blob as binary data contained in an ArrayBuffer.
The bytes() method of the Blob interface returns a Promise that resolves with a Uint8Array containing the contents of the blob as an array of bytes.
The slice() method of the Blob interface creates and returns a new Blob object which contains data from a subset of the blob on which it's called.
The text() method of the Blob interface returns a Promise that resolves with a string containing the contents of the blob, interpreted as UTF-8.
A block on a webpage is an HTML element that appears on a new line, i.e., underneath the preceding element in a horizontal writing mode, and above the following element (commonly known as a block-level element).
In JavaScript, a block is a collection of related statements enclosed in braces ("{}").
In CSS, content that participates in block layout is called block-level content.
The block-size CSS property defines the size of an element's block along the block axis.
A block cipher mode of operation, usually just called a "mode" in context, specifies how a block cipher should be used to encrypt or decrypt messages that are longer than the block size.
block_has_support(): Checks whether the current block type supports the feature requested.
block_version(): Returns the current version of the block format that the content string is using.