text: module.exports = {
      // render method: 'canvas' or 'image'
      render: 'image',
  
      // minimum version: 1..40
      minversion: 1,
  
      // error correction level: 'L', 'M', 'Q' or 'H'
      eclevel: 'L',
  
      // size in pixel
      size: 200,
  
      // pixel-ratio, null for devicePixelRatio
      ratio: null,
  
      // code color
      fill: '#333',
  
      // background color
      back: '#fff',
  
      // content
      text: 'no text',
  
      // roundend corners in pc: 0..100
      rounded: 0,
  
      // quiet zone in modules
      quiet: 0,
  
      // modes: 'plain', 'label' or 'image'
      mode: 'plain',
  
      // label/image size and pos in pc: 0..100
      msize: 30,
      mposx: 50,
      mposy: 50,
  
      // label
      label: 'no label',
      fontname: 'sans',
      fontcolor: '#333',
  
      // image element
      image: null
  };
  