Mithril: Multi-tenancy

multi_tenancy.js

//helpers
var target
function tenant(id, module) {
  return {
    controller: module.controller,
    view: function(ctrl) {
      return target == id ? module.view(ctrl) : {subtree: "retain"}
    }
  }
}
function local(id, callback) {
  return function(e) {
    target = id
    callback.call(this, e)
  }
}

//a module
var MyModule = {
  controller: function() {
    this.doStuff = function() {alert(1)}
  },
  view: function() {
    return m("button[type=button]", {
      onclick: local("MyModule", ctrl.doStuff)
    }, "redraw only MyModule")
  }
}

//init
m.module(element, tenant("MyModule", MyModule))