trying to click remove when input is enabled: https://the-internet.herokuapp.com/dynamic_controls

const { expect } = require("chai"); 
const {Builder,By} = require("selenium-webdriver");
describe("Dynamic controls",function(){
it("Remove/add checkbox",async function(){
    const driver = new Builder().forBrowser("firefox").build();
    await driver.get("https://the-internet.herokuapp.com/dynamic_controls");
    await driver.findElement(By.css("#input-example>button")).click();
    await driver.wait(driver.until.elementIsEnabled(By.CSS('#input-example > input[type=text]')), 30000);        
    await driver.findElement(By.css("#checkbox-example>button")).click();
});

});

I get an error: TypeError: Cannot read property 'elementIsEnabled' of undefined

If I try:

await driver.wait(until.elementIsEnabled(By.CSS('#input-example > input[type=text]')), 30000);

Have other error: ReferenceError: until is not defined