The JavaScript exception "missing } after property list" occurs when there is a mistake in the object initializer syntax somewhere. Might be in fact a missing curly bracket, but could also be a missing comma.

The JavaScript exception "missing variable name" is a common error. It is usually caused by omitting a variable name or a typographic error.

The keyTimes attribute represents a list of time values used to control the pacing of the animation.

The font-size-adjust attribute allows authors to specify an aspect value for an element that will preserve the x-height of the first choice font in a substitute font.

The in operator returns true if the specified property is in the specified object or its prototype chain.

The horiz-adv-x attribute indicates the horizontal advance after rendering a glyph in horizontal orientation.

The new operator lets developers create an instance of a user-defined object type or of one of the built-in object types that has a constructor function.

The height attribute defines the vertical length of an element in the user coordinate system.

The async function declaration creates a binding of a new async function to a given name. The await keyword is permitted within the function body, enabling asynchronous, promise-based behavior to be written in a cleaner style and avoiding the need to explicitly configure promise chains.

The elevation attribute specifies the direction angle for the light source from the XY plane towards the Z-axis, in degrees. Note that the positive Z-axis points towards the viewer of the content.