Do TextBuffers support transparency? about terminal-kit HOT 3 CLOSED

function useTextBuffer(){
  // place a textbuffer in the middle of the destination 
  // screenbuffer and set its empty cells to be 
  // transparent for bg and char
  foreground = termkit.ScreenBuffer.create({
    dst:background,
    x:10,
    y:8,
    width:20,
    height:3
  })
  
  textbuffer = termkit.TextBuffer.create({
    dst:foreground,
    x:0,
    y:0,
    width:20,
    height:3
  })
  textbuffer.setEmptyCellAttr({
      bgTransparency:true, 
      charTransparency:true
  })

  // the message text should be visible, but the surrounding
  // rows and cols of the TextBuffer should(?) be transparent
  textbuffer.moveTo(2,1)
  textbuffer.insert('hello textbuffer', { bgColor: 'blue' } )
  
  textbuffer.draw()
}

function useScreenBuffer(){
  // place a child screenbuffer in the middle of the
  // parent screenbuffer and draw a similar message
  foreground = termkit.ScreenBuffer.create({
    dst:background,
    x:10,
    y:8,
    width:20,
    height:3
  })

  foreground.put({x:1, y:1}, 'hello screenbuffer')
}

var termkit = require( 'terminal-kit' ),
    term = termkit.terminal,
    textbuffer, foreground, background;

// set up the base ScreenBuffer and add one of our two
// child buffers to it then draw everything to the term
background = termkit.ScreenBuffer.create({
  dst:term,
  x:1, 
  y:1,
  width:40,
  height:20,
  noFill:true
})
background.fill({
  char:'·', 
  attr:{color:'white', bgColor:'brightBlue'}
})

useTextBuffer() // or useScreenBuffer()

term.clear()
foreground.draw({blending:true})
background.draw()