How to wait for a condition with protractor and JavaScript?

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Protractor is a popular end-to-end testing framework for Angular applications that uses JavaScript and the Jasmine testing framework. To wait for a condition in Protractor, you can use the ExpectedConditions class, which provides a set of built-in conditions that can be used to wait for various elements and states in your application.

Here’s an example of how to wait for a condition using Protractor and JavaScript:

// Get a reference to the element that we want to wait for
const element = element(by.css('#my-element'));

// Wait for the element to be visible
const EC = protractor.ExpectedConditions;
const isElementVisible = EC.visibilityOf(element);
browser.wait(isElementVisible, 5000, 'Element taking too long to appear').then(() => {
  // Perform some action after the element is visible
  console.log('Element is visible');
});

In this example, we use the element() method to get a reference to an element on the page. We then use the ExpectedConditions.visibilityOf() method to create a condition that waits for the element to be visible.

We can then use the browser.wait() method to wait for the condition to be met. The browser.wait() method takes three arguments: the condition to wait for, the maximum amount of time to wait (in milliseconds), and an optional error message to display if the condition is not met within the specified time.

After the condition is met, the then() method is called, and we can perform some action (in this case, we log a message to the console).

With this code, we can wait for a condition to be met before executing further code, which can be useful in situations where we need to ensure that certain elements or states are present before performing certain actions in our tests.

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