javascript - React form in Rails with validation -

i learn reactjs components , have problem validation have code:

# postform.js.cjsx  @postform = react.createclass   getinitialstate: ->     link: ''     errors: ''   valid: ->     @state.link    handlechange: (e) ->     name = e.target.name     @setstate "#{ name }": e.target.value    handlesubmit: (e) ->     e.preventdefault()     $.ajax       method: 'post'       url: "/posts/"       datatype: 'json'       data:         post: {             link: @state.link         }       success: (data) =>         alert('success')       error: (data) =>         errors = data         alert('error' + data)    render: ->     errors =             <div id="error_explanation">               <h2>errors prohibited product being saved:</h2>               <ul>aaa               </ul>             </div>     react.dom.form       classname: 'form-inline'       onsubmit: @handlesubmit       `[errors]`       react.dom.div         classname: 'well'         react.dom.div           classname: 'form-group'           react.dom.input             type: 'text'             classname: 'form-control'             placeholder: 'link'             name: 'link'             value: @state.link             onchange: @handlechange         react.dom.button           type: 'submit'           classname: 'btn btn-primary'           disabled: !@valid()           'send link' 

how can validate link field in view add bootstrap error-class , put info validation problem rails? payload on post, when invalid:

{"link":["is invalid"]} 

and question - how can improve speed writing reactjs forms, or other components simple_form in rails?