# addAlt is most simple magick.
# Please your imagine.
addAlt = (html,callback)->
  # this.$ is jQuery 2.1.0 (current version)
  this.$('img:not([alt])').attr 'alt',''
  return callback null
  
  # if task is error then call this.
  # in that case then block the task.
  return callback 'errortype'

grunt.initConfig
  htmlmagick:
    imgfix:
      options:
        use:[addAlt] # subscribe the addAlt magick
      files:[
        'test/after/index.html':['test/before/index.html']
        'test/after/aboutme.html':['test/before/aboutme.html']
        'test/after/contact.html':['test/before/contact.html']
      ]