Using Playwright for Web Interaction: Installation, Element Selection, Click Handling, and Assertions

Before using Playwright, make sure the library is installed; you can do this with the command pip install playwright .

A basic script imports Playwright, launches a Chromium browser, opens a new page, navigates to a target URL, locates a button and an input field using await page.waitForSelector(...) , performs a click and fills the input, asserts the input value, and finally closes the browser.

Adjust the selectors to match the actual structure and attributes of the web page you are testing.

To ensure an element exists before clicking, Playwright offers several methods: button = await page.waitForSelector("button[id='submit']") waits for the element to appear; await page.expect("button[id='submit']").toHaveClass("my-button-class") asserts a specific class; and await page.waitFor.{condition}(function) can wait for custom conditions such as visibility or clickability.

The custom class name my-button-class is defined in your page’s CSS and can be used in assertions to verify that the button has the expected styling or state.

When handling click events, first locate the element with await page.waitForSelector("button[id='submit']") , then invoke await button.click() . You may add await page.waitForTimeout(2000) to pause and observe the result before closing the browser with await browser.close() .