feat(browser): introduce built-in locators (#6084)

Author: sheremet-va

docs/.vitepress/config.ts

@@ -185,6 +185,11 @@ export default ({ mode }: { mode: string }) => {
             link: '/guide/browser/interactivity-api',
             docFooterText: 'Interactivity API | Browser Mode',
           },
+          {
+            text: 'Locators',
+            link: '/guide/browser/locators',
+            docFooterText: 'Locators | Browser Mode',
+          },
           {
             text: 'Assertion API',
             link: '/guide/browser/assertion-api',

docs/config/index.md

@@ -1667,6 +1667,17 @@ Should Vitest UI be injected into the page. By default, injects UI iframe during
 
 Default iframe's viewport.
 
+#### browser.locators {#browser-locators}
+
+Options for built-in [browser locators](/guide/browser/locators).
+
+##### browser.locators.testIdAttribute
+
+- **Type:** `string`
+- **Default:** `data-testid`
+
+Attribute used to find elements with `getByTestId` locator.
+
 #### browser.screenshotDirectory {#browser-screenshotdirectory}
 
 - **Type:** `string`