playwright/docs/src/api/class-playwright.md

# class: Playwright

Playwright module provides a method to launch a browser instance.
The following is a typical example of using Playwright to drive automation:
```js
const { chromium, firefox, webkit } = require('playwright');

(async () => {
  const browser = await chromium.launch();  // Or 'firefox' or 'webkit'.
  const page = await browser.newPage();
  await page.goto('http://example.com');
  // other actions...
  await browser.close();
})();
```

By default, the `playwright` NPM package automatically downloads browser executables during installation. The `playwright-core` NPM package can be used to skip automatic downloads.

## property: Playwright.chromium
- type: <[BrowserType]>

This object can be used to launch or connect to Chromium, returning instances of [ChromiumBrowser].

## property: Playwright.devices
- type: <[Object]>

Returns a list of devices to be used with [`method: Browser.newContext`] or [`method: Browser.newPage`]. Actual list of devices can be found in [src/server/deviceDescriptors.ts](https://github.com/Microsoft/playwright/blob/master/src/server/deviceDescriptors.ts).

```js
const { webkit, devices } = require('playwright');
const iPhone = devices['iPhone 6'];

(async () => {
  const browser = await webkit.launch();
  const context = await browser.newContext({
    ...iPhone
  });
  const page = await context.newPage();
  await page.goto('http://example.com');
  // other actions...
  await browser.close();
})();
```

## property: Playwright.errors
* langs: js
- type: <[Object]>
  - `TimeoutError` <[function]> A class of [TimeoutError].

Playwright methods might throw errors if they are unable to fulfill a request. For example, [`method: Page.waitForSelector`]
might fail if the selector doesn't match any nodes during the given timeframe.

For certain types of errors Playwright uses specific error classes.
These classes are available via [`playwright.errors`](#playwrighterrors).

An example of handling a timeout error:
```js
try {
  await page.waitForSelector('.foo');
} catch (e) {
  if (e instanceof playwright.errors.TimeoutError) {
    // Do something if this is a timeout.
  }
}
```

## property: Playwright.firefox
- type: <[BrowserType]>

This object can be used to launch or connect to Firefox, returning instances of [FirefoxBrowser].

## property: Playwright.selectors
- type: <[Selectors]>

Selectors can be used to install custom selector engines. See [Working with selectors](./selectors.md#working-with-selectors) for more information.

## property: Playwright.webkit
- type: <[BrowserType]>

This object can be used to launch or connect to WebKit, returning instances of [WebKitBrowser].