Custom metrics struct

Appears in: pages table
As custom_metrics

Schema

Field name	Type	Description
`a11y`	String	Accessibility.
`ads`	String	Advertising technology and usage.
`almanac`	String	Metrics defined in the early versions of Web Almanac crawls.
`aurora`	String	Project Aurora.
`avg_dom_depth`	Integer	The average DOM depth of a page.
`cms`	String	Content Management Systems.
`Colordepth`	String	Color depth of a screen.
`cookies`	String	Cookie usage.
`crawl_links`	String	The links found during a crawl.
`css`	String	CSS usage.
`css-variables`	String	Use of CSS variables.
`doctype`	String	Document type declaration.
`document_height`	Integer	Height of the document.
`document_width`	Integer	Width of the document.
`Dpi`	Integer	Dots per inch (DPI) of a screen.
`event-names`	String	Event names used in JavaScript.
`fugu-apis`	String	Usage of Fugu APIs.
`generated-content`	String	Client-side generated content.
`has_shadow_root`	String	Presence of shadow DOM roots.
`Images`	String	Images usage.
`img-loading-attr`	String	Image loading attributes.
`initiators`	String	Resource initiators.
`inline_style_bytes`	Integer	Size of inline styles.
`javascript`	String	JavaScript usage.
`lib-detector-version`	String	Libraries detector version.
`localstorage_size`	Integer	Size of local storage.
`markup`	String	HTML markup.
`media`	String	Media elements.
`meta_viewport`	String	Meta viewport tag.
`num_iframes`	Integer	Number of iframes on a page.
`num_scripts`	Integer	Number of script tags.
`num_scripts_async`	Integer	Number of asynchronous scripts.
`num_scripts_sync`	Integer	Number of synchronous scripts.
`observers`	String	Metrics related to the usage of observer APIs.
`performance`	String	Web performance.
`privacy-sandbox`	String	Privacy Sandbox initiative usage.
`privacy`	String	Privacy settings and policies.
`pwa`	String	Progressive Web Apps.
`quirks_mode`	String	Usage of quirks mode in browsers.
`Resolution`	Integer	Resolution of a screen.
`responsive_images`	String	Responsive image techniques.
`robots_meta`	String	Robots meta tag.
`robots_txt`	String	robots.txt file.
`sass`	String	Usage of Sass.
`security`	String	Security features.
`sessionstorage_size`	Integer	Size of session storage.
`structured-data`	String	Structured data.
`third-parties`	String	Third-party resources.
`usertiming`	String	User Timing API.
`valid-head`	String	Validity of the head element.
`well-known`	String	well-known URIs.
`wpt_bodies`	String	Metrics derived from WebPageTest bodies object.

`a11y`

Accessibility.

`ads`

Advertising technology and usage.

See the ads custom metric for more information.

`almanac`

Metrics defined in the early versions of Web Almanac crawls.

`aurora`

Project Aurora.

`avg_dom_depth`

The average DOM depth of a page.

`cms`

Content Management Systems.

`Colordepth`

Color depth of a screen.

`cookies`

Cookie usage.

`crawl_links`

The links found during a crawl.

`css`

CSS usage.

`css-variables`

Use of CSS variables.

`doctype`

Document type declaration.

`document_height`

Height of the document.

`document_width`

Width of the document.

`Dpi`

Dots per inch (DPI) of a screen.

`event-names`

Event names used in JavaScript.

`fugu-apis`

Usage of Fugu APIs.

`generated-content`

Client-side generated content.

`has_shadow_root`

Presence of shadow DOM roots.

`Images`

Images usage.

`img-loading-attr`

Image loading attributes.

`initiators`

Resource initiators.

`inline_style_bytes`

Size of inline styles.

`javascript`

JavaScript usage.

`lib-detector-version`

Libraries detector version.

`localstorage_size`

Size of local storage.

`markup`

HTML markup.

`media`

Media elements.

`meta_viewport`

Meta viewport tag.

`num_iframes`

Number of iframes on a page.

`num_scripts`

Number of script tags.

`num_scripts_async`

Number of asynchronous scripts.

`num_scripts_sync`

Number of synchronous scripts.

`observers`

Metrics related to the usage of observer APIs.

`performance`

Web performance.

See the performance custom metric for more information.

`privacy-sandbox`

Privacy Sandbox initiative usage.

`privacy`

Privacy settings and policies.

See the privacy custom metric for more information.

`pwa`

Progressive Web Apps.

`quirks_mode`

Usage of quirks mode in browsers.

`Resolution`

Resolution of a screen.

`responsive_images`

Responsive image techniques.

`robots_meta`

Robots meta tag.

`robots_txt`

robots.txt file.

`sass`

Usage of Sass.

`security`

Security features.

`sessionstorage_size`

Size of session storage.

`structured-data`

Structured data.

`third-parties`

Third-party resources.

`usertiming`

User Timing API.

`valid-head`

Validity of the head element.

`well-known`

well-known URIs.

`wpt_bodies`

Metrics derived from WebPageTest bodies object.