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- This serves as a forward proxy on WebElement, allowing calls to be scheduled without directly on this instance before the underlying WebElement has been fulfilled.
www.selenium.dev/selenium/docs/api/javascript/WebElementPromise.html
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Mar 4, 2015 · What Is A Promise? WebdriverJS uses Promises for all of its interactions with a browser. In this context, a Promise is “an object that represents a value, or the eventual computation of a value”.
- Callbacks
- Promises
- When Javascript Breaks Promises
- So What’s The Takeaway Here?
Synchronous code is easy to understand because it executes in the order it is written. A good comparison on this point is often made using the synchronous and asynchronous file APIs in Node.js, so I’ll do the same thing here. What follows is a script that writes to a file and reads back the contents synchronously. Each of console lines will print i...
Promises address this problem by giving you a way to organize callbacks into discrete steps that are easier to read and maintain. Promises can be combined to orchestrate asynchronous tasks and structure code in various ways. This is a lot easier to show in operation so I’m going to do so in the context of WebDriverJS. WebDriverJS returns Promises f...
So it all sounds great, right? WebDriverJS (along with other libraries) incorporate promises that let you structure code and some of those libraries (again, like WebDriverJS) provide mechanisms, like promise managers, to make the coding of such mechanics largely transparent. Except — that’s not always a good thing. Let’s consider another example he...
What all of this means is that you have to be aware of what JavaScript libraries you are using, whether they are promise-aware, and some of the issues with how those promises are dealt with by the library. This is a very different challenge than you will have likely faced in most other programming languages where you were using WebDriver to drive a...
May 3, 2018 · According to the webdriver documentation, the sleep method returns a promise which is resolved when the time is reached. You can handle the asynchronous part with this code : .then(_element => {. element = _element.
May 3, 2018 · What is a Promise? A Promise is an asynchronous operation. It’s called a “Promise” because we are promised a result at a future time[1]. All interactions with asynchronous websites return a...
Oct 7, 2024 · The Promise object represents the eventual completion (or failure) of an asynchronous operation and its resulting value. To learn about the way promises work and how you can use them, we advise you to read Using promises first.
Jul 9, 2024 · A page object is an object-oriented class that serves as an interface to a page of your AUT. The tests then use the methods of this page object class whenever they need to interact with the UI of that page.
Oct 31, 2017 · The WebDriverJS library uses a promise manager to ease the pain of working with a purely asynchronous API. Rather than writing a long chain of promises, the promise manager allows you to write code as if WebDriverJS had a synchronous, blocking API (like all of the other Selenium language bindings). For instance, instead of.
