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Playwright 库

Playwright 模块提供了启动浏览器实例的方法。以下是使用 Playwright 驱动自动化的典型示例：

¥Playwright module provides a method to launch a browser instance. The following is a typical example of using Playwright to drive automation:

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();
})();

属性​

¥Properties

chromium​

Added before v1.9 playwright.chromium

该对象可用于启动或连接到 Chromium，返回 Browser 的实例。

¥This object can be used to launch or connect to Chromium, returning instances of Browser.

用法

¥Usage

playwright.chromium

类型

¥Type

devices​

Added before v1.9 playwright.devices

返回与 browser.newContext() 或 browser.newPage() 一起使用的设备字典。

¥Returns a dictionary of devices to be used with browser.newContext() or browser.newPage().

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();
})();

用法

¥Usage

playwright.devices

类型

¥Type

errors​

Added before v1.9 playwright.errors

如果 Playwright 方法无法满足请求，则可能会引发错误。例如，如果选择器在给定时间范围内未匹配任何节点，则 locator.waitFor() 可能会失败。

¥Playwright methods might throw errors if they are unable to fulfill a request. For example, locator.waitFor() might fail if the selector doesn't match any nodes during the given timeframe.

对于某些类型的错误，Playwright 使用特定的错误类别。这些类可通过 playwright.errors 获得。

¥For certain types of errors Playwright uses specific error classes. These classes are available via playwright.errors.

处理超时错误的示例：

¥An example of handling a timeout error:

try {
  await page.locator('.foo').waitFor();
} catch (e) {
  if (e instanceof playwright.errors.TimeoutError) {
    // Do something if this is a timeout.
  }
}

用法

¥Usage

playwright.errors

类型

¥Type

某 TimeoutError 班。

¥A class of TimeoutError.

firefox​

Added before v1.9 playwright.firefox

该对象可用于启动或连接到 Firefox，返回 Browser 的实例。

¥This object can be used to launch or connect to Firefox, returning instances of Browser.

用法

¥Usage

playwright.firefox

类型

¥Type

request​

Added in: v1.16 playwright.request

公开可用于 Web API 测试的 API。

¥Exposes API that can be used for the Web API testing.

用法

¥Usage

playwright.request

类型

¥Type

selectors​

Added before v1.9 playwright.selectors

选择器可用于安装自定义选择器引擎。请参阅 extensibility 了解更多信息。

¥Selectors can be used to install custom selector engines. See extensibility for more information.

用法

¥Usage

playwright.selectors

类型

¥Type

webkit​

Added before v1.9 playwright.webkit

该对象可用于启动或连接到 WebKit，返回 Browser 的实例。

¥This object can be used to launch or connect to WebKit, returning instances of Browser.

用法

¥Usage

playwright.webkit

类型

¥Type