The SVGTextContentElement is inherited by various text-related interfaces such as SVGTextElement SVGTSpanElement SVGTRefElement SVGAltGlyphElement and SVGTextPathElement. For the methods on this interface that refer to an index to a character or a number of characters these references are to be interpreted as an index to a UTF-16 code unit or a number of UTF-16 code units respectively. This is for consistency with DOM Level 2 Core where methods on the CharacterData interface use UTF-16 code units as indexes and counts within the character data.Thus for example if the text content of a text element is a single non-BMP character such as U10000 then invoking getNumberOfChars on that element will return 2 since there are two UTF-16 code unitsthe surrogate pair used to represent that one character.... Can be set, to replace the contents of the element...its contents. Can be set, to replace the element with nodes parsed...
