docs: function () {
  
      var categories = grunt.file.readJSON('config/grunt/available-animations.json'),
        category, files, file,
        dbCategoryList = [];
  
      // load template for comments
      animationTemplate = grunt.file.read(config.animationTemplateSrc);
  
      for ( category in categories ) {
        // examp: category = 'attention_seekers'
        if ( categories.hasOwnProperty(category) ) {
          files = categories[category];
          // specif animation
          for (file in files) {
            if ( files.hasOwnProperty(file) && files[file] ) {
              updateAnimation(category, file);
            }
          }
        }
      }
    }