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Selectors

选择器可用于安装自定义选择器引擎。有关更多信息，请参阅可扩展性。

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

方法​

🌐 Methods

register​

Added before v1.9 selectors.register

创建页面之前必须注册选择器。

🌐 Selectors must be registered before creating the page.

用法

注册根据标签名称查询元素的选择器引擎的示例：

🌐 An example of registering selector engine that queries elements based on a tag name:

// Script that evaluates to a selector engine instance. The script is evaluated in the page context.
String createTagNameEngine = "{\n" +
  "  // Returns the first element matching given selector in the root's subtree.\n" +
  "  query(root, selector) {\n" +
  "    return root.querySelector(selector);\n" +
  "  },\n" +
  "  // Returns all elements matching given selector in the root's subtree.\n" +
  "  queryAll(root, selector) {\n" +
  "    return Array.from(root.querySelectorAll(selector));\n" +
  "  }\n" +
  "}";
// Register the engine. Selectors will be prefixed with "tag=".
playwright.selectors().register("tag", createTagNameEngine);
Browser browser = playwright.firefox().launch();
Page page = browser.newPage();
page.setContent("<div><button>Click me</button></div>");
// Use the selector prefixed with its name.
Locator button = page.locator("tag=button");
// Combine it with built-in locators.
page.locator("tag=div").getByText("Click me").click();
// Can use it in any methods supporting selectors.
int buttonCount = (int) page.locator("tag=button").count();
browser.close();

参数

  • name String#

    在选择器中用作前缀的名称，例如 {name: 'foo'} 启用 foo=myselectorbody 选择器。只能包含 [a-zA-Z0-9_] 字符。

  • script String | Path#

    脚本会被计算为选择器引擎实例。该脚本在页面上下文中执行。

  • options Selectors.RegisterOptions (optional)

    • setContentScript boolean (optional)#

      是否在隔离的 JavaScript 环境中运行此选择器引擎。此环境可以访问相同的 DOM，但无法访问框架脚本中的任何 JavaScript 对象。默认为 false。请注意，当此引擎与其他已注册引擎一起使用时，作为内容脚本运行并不保证。

返回

setTestIdAttribute​

Added in: v1.27 selectors.setTestIdAttribute

定义要在 Page.getByTestId() 中使用的自定义属性名称。默认使用 data-testid。

🌐 Defines custom attribute name to be used in Page.getByTestId(). data-testid is used by default.

用法

Selectors.setTestIdAttribute(attributeName);

参数

  • attributeName String#

    测试 id 属性名称。