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:
const { selectors, firefox } = require('@playwright/test'); // Or 'chromium' or 'webkit'.
(async () => {
// Must be a function that evaluates to a selector engine instance.
const createTagNameEngine = () => ({
// Returns the first element matching given selector in the root's subtree.
query(root, selector) {
return root.querySelector(selector);
},
// Returns all elements matching given selector in the root's subtree.
queryAll(root, selector) {
return Array.from(root.querySelectorAll(selector));
}
});
// Register the engine. Selectors will be prefixed with "tag=".
await selectors.register('tag', createTagNameEngine);
const browser = await firefox.launch();
const page = await browser.newPage();
await page.setContent(`<div><button>Click me</button></div>`);
// Use the selector prefixed with its name.
const button = page.locator('tag=button');
// We can combine it with built-in locators.
await page.locator('tag=div').getByText('Click me').click();
// Can use it in any methods supporting selectors.
const buttonCount = await page.locator('tag=button').count();
await browser.close();
})();
参数
-
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。 -
scriptfunction | string | Object#-
pathstring (optional)JavaScript 文件的路径。如果
path是相对路径,则相对于当前工作目录解析。可选。 -
contentstring (optional)原始脚本内容。可选。
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。
-
-
optionsObject (optional)
返回
setTestIdAttribute
Added in: v1.27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