The lr, lr-tb, rl, rl-tb, tb, and tb-rl keyword values for the writing-mode CSS property set the text direction for elements in SVG 1.1 documents.

Touch events touchstart, touchmove, touchend, and touchcancel fire when users interact with a touch-sensitive surface, such as a screen or drawing tablet. These events are similar to mouse events.

The DOM level 2 style specification defined interfaces to access and modify CSS styles, such as CSSValue and CSSPrimitiveValue, that were later excluded from the CSS object model.

The cross-fade() CSS function generates an image by mixing two images.

The with JavaScript statement adds a given object to the chain of scopes used to evaluate names.

The inverted-colors CSS media query sets styles based on whether the user has inverted all colors, such as with mobile accessibility settings.

The Notification() constructor shows a message to the user, typically using the notification system of the host operating system.

The filter() CSS function applies one or more graphic effects to a CSS image, such as a background image. You can use functions, such as blur() and drop-shadow(), alone or combined to produce different effects. For instance, background: filter(url(image.png), blur(2px)).

The MediaSource API is a custom data source for media elements commonly used for adaptive streaming. Also known as Media Source Extensions (MSE).

The rel="prefetch" attribute for the <link> HTML element is a hint to the browser that the user is likely to navigate to a resource, so the browser should preemptively fetch and cache the resource.

The __defineGetter__() and __defineSetter__() methods of objects bind a function to a property, which is called on setting or reading the property.

The setPosition() and setOrientation() methods of the AudioListener API set the virtual position and orientation of a person relative to sound sources, to spatialize audio in a Web Audio context.

The device-aspect-ratio, device-height, and device-width media features describe physical properties of the displaying output device.

The caller and arguments properties of a non-strict mode Function object are the function that called it and the arguments it was called with. Not to be confused with the arguments variable in a function body's local scope.

JavaScript built-in methods such as, String.bold() and String.italics(), wrap strings in (often historic) HTML.

The page-break-before, page-break-inside, and page-break-after CSS properties are aliases to the break-before, break-inside, and break-after properties.

The :first, :left, and :right pseudo-classes select pages based on their position in sequence after pagination.

The compile() method of RegExp objects recompiles an existing regular expression object using a new pattern and flags.

The RegExp object has several static properties to access the input and results of the most-recent regular expression match.

The WEBGL_compressed_texture_s3tc extension for WebGL 1.0 and 2.0 contexts adds S3TC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().

The wheel event fires when the user moves a mouse wheel or similar spatially rotating input device.

The widows and orphans CSS properties set the minimum lines included in a text fragment created by page, column, or region breaks.

The XSLTProcessor API transforms XML documents into new XML or HTML documents, using XSLT stylesheets. You can use XSLT to convert data between different XML schemas or to convert XML data into web pages or PDF documents. Also known as Extensible Stylesheet Language Transformations.

The __proto__ property of objects partially exposes the prototype of an object.

The callee property of the arguments variable in a non-strict function body's local scope is the function that arguments belongs to.

The beforeunload event is fired when the current window is about to be unloaded. Typically this is used to display a dialog to confirm if users really want to leave the page when there is unsaved data that would be lost.

The window.devicePixelRatio property is the ratio of the size of one CSS pixel to the vertical size of one physical pixel on the current display device.

The escape() and unescape() built-in Javascript methods encode and unencode strings using percent encoding, where certain characters are replaced by hexadecimal escape sequences.

The getYear() and setYear() methods of Date objects get and set the year as an offset to 1900.

The toGMTString() method of Date objects is an alias to the toUTCString() method.