选择器
选择器可用于安装自定义选择器引擎。有关更多信息,请参阅扩展性。
方法
RegisterAsync
在 v1.9 之前添加必须在创建页面之前注册选择器。
用法
注册基于标签名称查询元素的选择器引擎的示例
using Microsoft.Playwright;
using var playwright = await Playwright.CreateAsync();
// Script that evaluates to a selector engine instance. The script is evaluated in the page context.
await playwright.Selectors.RegisterAsync("tag", new()
{
Script = @"{
// 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));
}
}"
});
await using var browser = await playwright.Chromium.LaunchAsync();
var page = await browser.NewPageAsync();
await page.SetContentAsync("<div><button>Click me</button></div>");
// Use the selector prefixed with its name.
var button = page.Locator("tag=button");
// Combine it with built-in locators.
await page.Locator("tag=div").GetByText("Click me").ClickAsync();
// Can use it in any methods supporting selectors.
int buttonCount = await page.Locator("tag=button").CountAsync();
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。 -
options
SelectorsRegisterOptions?
(可选)
返回值
SetTestIdAttribute
在以下版本中添加:v1.27定义要在Page.GetByTestId()中使用的自定义属性名称。默认情况下使用 data-testid
。
用法
Selectors.SetTestIdAttribute(attributeName);
参数