当Angular不可用时，如何等待直到在Protractor中可见元素？

尝试使用底层驱动程序的预期条件：

var config = require("../helpers/config.js");var until = require('selenium-webdriver').until;var login = function() {    var driver = browser.driver;    driver.get(config.dsp.url);    driver.findElement(by.name("userName")).sendKeys(config.dsp.user);    driver.findElement(by.name("password")).sendKeys(config.dsp.password);    driver.findElement(by.name("submit")).click();    return driver.wait(until.elementLocated(by.css(".sample-class-name")), 10000)      .then(e => driver.wait(until.elementIsVisible(e)), 10000);}module.exports = login;