javascript - NoSuchElementError : Unable to locate element - Selenium webdriver using Javascript 错误

Question

因此，由于无数小时的研究，我知道了这个问题。唯一的问题是没有人像我一样基于他们的代码和/或不清楚在我的代码中插入的位置/内容。我知道您需要执行 try/catch 语句和/或执行 wait.until 语句。我都试过了都没有成功，非常感谢任何帮助。提前致谢!

require('chromedriver');
const selenium = require("selenium-webdriver");
const By = selenium.By;
const until = selenium.until;

const driver = new selenium.Builder().forBrowser("chrome").build();

driver.get("https://qa.chaplinq.org/LinQ/Account/SignIn");

const locators = {
    loginForm: By.id("login-form"),
    loginField: By.css("input#UserName"),
    loginPass: By.css("#login-form input[name='Password']"),
    signIn: By.css("form#login-form > footer > button"),
    createAcc: By.css("a#createAccountBtn"),
    applyfirstName: By.css("input#FirstName"),
    applylastName: By.css("input#LastName"),

function createAcc() {
    driver.findElement(locators.createAcc).click();

};

function firstName(text) {
    driver.findElement(locators.applyfirstName).sendKeys(text);
};

createAcc();
firstName("kevin");

[ERROR] node : (node:1896) UnhandledPromiseRejectionWarning: 
NoSuchElementError: no such element: Unable to 
[ERROR] locate element: {"method":"css 
selector","selector":"input#FirstName"}
[ERROR] At line:1 char:1
[ERROR] + node index.js
[ERROR] + ~~~~~~~~~~~~~
[ERROR]     + CategoryInfo          : NotSpecified: ((node:1896) 
Unh...put#FirstName"}:String) [], RemoteExcepti 
[ERROR]    on
[ERROR]     + FullyQualifiedErrorId : NativeCommandError
[ERROR]  
[ERROR]   (Session info: chrome=69.0.3497.100)
[ERROR]   (Driver info: chromedriver=2.42.591088 
(7b2b2dca23cca0862f674758c9a3933e685c27d5),platform=Windows NT 
[ERROR] 10.0.17763 x86_64)
[ERROR]     at Object.checkLegacyResponse 
(C:\users\kevin.yu\node_modules\selenium-webdriver\lib\error.js:585:15)
[ERROR]     at parseHttpResponse (C:\users\kevin.yu\node_modules\selenium- 
webdriver\lib\http.js:533:13)
[ERROR]     at Executor.execute (C:\users\kevin.yu\node_modules\selenium- 
webdriver\lib\http.js:468:26)
[ERROR]     at process._tickCallback (internal/process/next_tick.js:68:7)
[ERROR] 
[ERROR] (node:1896) UnhandledPromiseRejectionWarning: Unhandled promise 
rejection. This error originated either 
[ERROR] by throwing inside of an async function without a catch block, or by 
rejecting a promise which was not 
[ERROR] handled with .catch(). (rejection id: 1)
[ERROR] 
[ERROR] (node:1896) [DEP0018] DeprecationWarning: Unhandled promise 
rejections are deprecated. In the future, 
[ERROR] promise rejections that are not handled will terminate the Node.js 
process with a non-zero exit code.
[ERROR] 

Answer 1

“NoSuchElementError”表明该元素(还)不存在于 HTML 文档中。当某些元素动态出现/消失时，可能会发生这种情况。当您的 Selenium 脚本运行速度快于元素加载速度时，该元素尚不可见，将抛出此错误。

在您的情况下，元素 input#FirstName 是否仅在单击 input#FirstName 后出现？

如果是这样，请考虑添加 pause或 wait介于 createAcc() 和 firstName() 之间的函数