ReactJS: How to use boolean values in radio buttons?

Use the checked attribute of input for radio buttons. That attribute uses booleans.

Currently the solution is to convert the passed attributes from string values to boolean before saving.

var str2bool = (value) => {
   if (value && typeof value === "string") {
        if (value.toLowerCase() === "true") return true;
        if (value.toLowerCase() === "false") return false;
   }
   return value;
}

And calling the conversion:

onRadioChange: function(e) {
    console.log(str2bool(e.target.value));
    // Here we can send the data to further processing (Action/Store/Rest)
}

This way the data is ready to be send through actions to Rest or Stores and it works directly with the radio buttons.