Method chaining with arguments - demonstrating a simple conversion pipeline utility

gistfile1.js

var Editor = function(){};

Editor.prototype.convert = {};

Editor.prototype.convert.from = function(type) {
  this.fromType = type;
  return this;
};

Editor.prototype.convert.to = function(type) {
  this.toType = type;
  this.parse(this.fromType, this.toType);
  return this;
};

Editor.prototype.convert.parse = function(from, to) {
  // Do some parsing
  return this;
};

var editor = new Editor();
editor.convert.from('html').to('markdown');

convert.from('html').to('markdown');