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The Presentation API lets a user agent (such as a Web browser) effectively display web content through large presentation devices such as projectors and network-connected televisions. Supported types of multimedia devices include both displays which are wired using HDMI, DVI, or the like, or wireless, using DLNA, Chromecast, AirPlay, or Miracast.

The readable read-only property of the TextDecoderStream interface returns a ReadableStream that emits decoded strings.

The readable read-only property of the TextEncoderStream interface returns a ReadableStream that emits encoded binary data as Uint8Array chunks.

The writable read-only property of the TextEncoderStream interface returns a WritableStream that accepts strings to be encoded into binary data.

The lang global attribute helps define the language of an element: the language that non-editable elements are written in, or the language that the editable elements should be written in by the user. The attribute contains a single BCP 47 language tag.

The font-synthesis shorthand CSS property lets you specify whether or not the browser may synthesize the bold, italic, small-caps, and/or subscript and superscript typefaces when they are missing in the specified font-family.

The text-combine-upright CSS property sets the combination of characters into the space of a single character. If the combined text is wider than 1em, the user agent must fit the contents within 1em. The resulting composition is treated as a single upright glyph for layout and decoration. This property only has an effect in vertical writing modes.