1. DomName('WebGL2RenderingContext.compressedTexImage3D')
  2. DocsEditable()
  3. Experimental()
void compressedTexImage3D(int target, int level, int internalformat, int width, int height, int depth, int border, TypedData data)

Source 

@DomName('WebGL2RenderingContext.compressedTexImage3D')
@DocsEditable()
@Experimental() // untriaged
void compressedTexImage3D(int target, int level, int internalformat, int width, int height, int depth, int border, TypedData data) => _blink.BlinkWebGL2RenderingContext.instance.compressedTexImage3D_Callback_8_(this, target, level, internalformat, width, height, depth, border, data);