JSFiddle - React, Tailwind, and code Playground

CoffeeScript

class Child
  constructor: (@id) ->
    console.log "new child #{@id}"
  animations:
    start: ->
      console.log @, "#{@id} start animations"

class Parent
  constructor: ->
    @_childs = []
    _.each [1..10], (index) =>
      @_childs.push new Child(index)
  startAll: ->
    _.each @_childs, (child) ->
      child.animations.start()
        
      
parent = new Parent()
parent.startAll()