Вы должны использовать JSON условия:
https://codesandbox.io/s/angry-sinoussi-jswhr
import React from "react";
import ReactDOM from "react-dom";
import { Form } from "react-formio";
import "./styles.css";
import "bootstrap/dist/css/bootstrap.css";
const rootElement = document.getElementById("root");
ReactDOM.render(
<Form
src={{
_id: "5b8c14217f43cc293958e2bc",
type: "form",
tags: [],
owner: "553dbfc08d22d5cb1a7024f2",
components: [
{
label: "First Name",
placeholder: "Enter First Name",
key: "firstName",
type: "textfield",
input: true
},
{
label: "Last Name",
placeholder: "Enter Last Name",
key: "lastName",
type: "textfield",
input: true
},
{
label: "Password",
placeholder: "Enter password",
tableView: false,
key: "password",
type: "password",
input: true,
protected: true,
conditional: {
json: {
and: [
{
"!=": [
{
var: "data.firstName"
},
""
]
},
{
"!=": [
{
var: "data.lastName"
},
""
]
}
]
}
}
},
{
type: "button",
label: "Submit",
key: "submit",
disableOnInvalid: true,
input: true
}
]
}}
onSubmit={i => {
console.log(i);
}}
/>,
// <Form src="https://peb3z.sse.codesandbox.io/abc" onSubmit={(i)=>{console.log(i)}} />,
rootElement
);