htmx.defineExtension('json-enc', {
  onEvent: function(name, evt) {
    if (name === 'htmx:configRequest') {
      evt.detail.headers['Content-Type'] = 'application/json'
    }
  },

  encodeParameters: function(xhr, parameters, elt) {
    xhr.overrideMimeType('text/json')
    return (JSON.stringify(parameters))
  }
})