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Frontend: Handling custom data

Actions can result in custom data being returned by the server. Custom data can come either together with a form, or without. There are two ways to handle custom data. First, you can specify the custom_data_handler option, which should be a function accepting the data object. The function will be invoked after rendering the form with render (or calling the renderResponseFn):

function handleData(data) {
    $('#messages').html('Server response: ' + data);

var form = new Supler.Form(formContainer, {
  custom_data_handler: handleData,
  // other options

The second way is to get the custom data by hand, using Form.getCustomData(json) (where json is what you receive from the server), and if the result is not null, handling it as desired.