Returns the alpha value (i.e. the opacity) for this @component, on a scale from 0 (fully transparent) to 1.0 (fully opaque).
An alpha value from 0 to 1.0, inclusive.
1.12
See Implementation
Returns the alpha value (i.e. the opacity) for this @component, on a scale from 0 (fully transparent) to 1.0 (fully opaque).