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JavaScript API

k6/browser

FrameLocator

getByAltText(altText[, options])

Open source

getByAltText(altText[, options])

Returns a locator for elements with the specified alt text. This method is useful for locating images and other elements that have an alt attribute, making your tests more accessible and user-focused.

Parameter	Type	Default	Description
`altText`	string \| RegExp	-	Required. The alt text to search for. Can be a string for exact match or a RegExp for pattern matching.
`options`	object	`null`
`options.exact`	boolean	`false`	Whether to match the alt text exactly with case sensitivity. When `true`, performs a case-sensitive match.

Returns

Type	Description
Locator	A locator object that can be used to interact with elements matching the specified alt text.

Examples

Basic alt text matching

Find and click an image by its alt text:

import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  const page = await browser.newPage();

  try {
    await page.setContent(`
      <iframe id="my_frame" src="https://quickpizza.grafana.com" width="50%" height="50%"></iframe>
    `);

    const logo = page.locator('#my_frame').contentFrame().getByAltText('LOGO');
    await logo.waitFor();

    await logo.click();
    await page.waitForLoadState();
  } finally {
    await page.close();
  }
}

Exact alt text matching

Use exact matching for precise alt text:

import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  const page = await browser.newPage();

  try {
    await page.setContent(`
      <iframe id="my_frame" src="https://quickpizza.grafana.com" width="50%" height="50%"></iframe>
    `);

    const logo = page.locator('#my_frame').contentFrame().getByAltText('logo', { exact: true });
    await logo.waitFor();

    await logo.click();
    await page.waitForLoadState();
  } finally {
    await page.close();
  }
}

Using regular expressions

Find images using pattern matching:

import { browser } from 'k6/browser';

export const options = {
  scenarios: {
    ui: {
      executor: 'shared-iterations',
      options: {
        browser: {
          type: 'chromium',
        },
      },
    },
  },
};

export default async function () {
  const page = await browser.newPage();

  try {
    await page.setContent(`
      <iframe id="my_frame" src="https://quickpizza.grafana.com" width="50%" height="50%"></iframe>
    `);

    const logo = page.locator('#my_frame').contentFrame().getByAltText(/logo/s);
    await logo.waitFor();

    await logo.click();
    await page.waitForLoadState();
  } finally {
    await page.close();
  }
}

Common use cases

Image testing:
- Testing image alt text for accessibility compliance
- Interacting with clickable images/banners
Accessibility testing:
- Ensuring all images have meaningful alt text
- Testing screen reader compatibility
- Validating WCAG compliance
UI interaction:
- Clicking on logo images to navigate home
- Selecting images in galleries or carousels
- Interacting with image-based buttons

Best practices

Use descriptive alt text: When creating tests, ensure your application uses meaningful alt text that describes the image content or function.
Prefer exact matches: Use exact: true when you need precise matching to avoid false positives.
Accessibility-first: Using getByAltText() encourages better accessibility practices by ensuring images have proper alt attributes.
Regular expressions for patterns: Use RegExp for flexible matching when dealing with dynamic or numbered content.
Combine with assertions: Always verify that the located elements behave as expected using assertions.