How do I modify browser arguments during a test without closing the browser or leaving the current page using Playwright?

Answer

Sure, you can modify browser arguments mid-test with Playwright without closing the browser or leaving the current page. Here's how:

First, create an instance of the Browser class from the playwright package. This class represents a single browser instance and provides methods for launching new browser contexts.

const { chromium } = require('playwright');
const browser = await chromium.launch();
const context = await browser.newContext({
  args: ['--no-sandbox', '--disable-setuid-sandbox'],
});

In the above example, we've launched a new context with two arguments (--no-sandbox and --disable-setuid-sandbox).

If you want to change these arguments mid-test, create a new context with updated arguments and then create a new page within that context.

const updatedContext = await browser.newContext({
  args: ['--disable-gpu', '--lang=en-US'],
});
const page = await updatedContext.newPage();
await page.goto('https://ray.run');

In this example, we've created another instance of BrowserContext called updatedContext, passing different set of command-line arguments (--disable-gpu, --lang=en-US). Then, we create a new page within this updated context using newPage() method.

Remember, changing browser arguments mid-test may affect the behavior of the browser and the loaded web pages. Some arguments may require a browser restart to take effect, while others can be modified dynamically. So, consider which arguments can be safely changed during runtime and test accordingly.