Measure <th headers>

[tunetheweb]

We only measured <td header> usage, but this can also be used on <th> (and arguably makes more sense there!)

Test websites:

• https://adrianroselli.com/demos/support-for-headers-attribute/index.html

[github-actions]

Super-linter summary

Language	Validation result
EDITORCONFIG	Pass ✅
JAVASCRIPT_ES	Fail ❌
YAML	Pass ✅

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JAVASCRIPT_ES

/github/workspace/dist/a11y.js
  46:1  error  Parsing error: 'return' outside of function

✖ 1 problem (1 error, 0 warnings)

[github-actions]

https://almanac.httparchive.org/en/2022/

WPT result details

Changed custom metrics values:

{
  "_a11y": {
    "tables": {
      "total": 0,
      "total_with_caption": 0,
      "total_with_presentational": 0,
      "total_with_figcaption": 0
    },
    "file_extension_alts": {
      "total_elements_with_alt": 5,
      "total_elements_with_non_empty_alt": 0,
      "total_with_file_extension": 0,
      "file_extensions": {}
    },
    "title_and_alt": {
      "total_alt": 5,
      "total_title": 5,
      "total_both": 0,
      "total_alt_same_as_title": 0
    },
    "th_with_scope_attribute": {
      "total_th": 0,
      "total_with_scope": 0,
      "scopes": {}
    },
    "td_with_headers_attribute": {
      "total_tds": 0,
      "total_with_headers": 0
    },
    "th_with_headers_attribute": {
      "total_ths": 0,
      "total_with_headers": 0
    },
    "total_anchors_with_role_button": 0,
    "total_role_tab_with_selected_and_controls": 0,
    "placeholder_but_no_label": {
      "total_placeholder": 4,
      "total_no_label": 0
    },
    "divs_or_spans_as_button_or_link": {
      "total_role_button": 0,
      "total_role_link": 0,
      "total_either": 0
    },
    "screen_reader_classes": false,
    "form_control_a11y_tree": {
      "__error": {
        "stack": "TypeError: Cannot read properties of undefined (reading 'value')\n    at addControlToStats (<anonymous>:208:28)\n    at <anonymous>:252:1\n    at captureAndLogError (<anonymous>:30:8)\n    at wptCustomMetric (<anonymous>:201:25)\n    at <anonymous>:324:7",
        "message": "Cannot read properties of undefined (reading 'value')"
      }
    },
    "fieldset_radio_checkbox": {
      "total_radio": 0,
      "total_checkbox": 0,
      "total_radio_in_fieldset": 0,
      "total_checkbox_in_fieldset": 0,
      "fieldsets": []
    },
    "required_form_controls": []
  }
}

https://adrianroselli.com/demos/support-for-headers-attribute/index.html

WPT result details

Changed custom metrics values:

{
  "_a11y": {
    "tables": {
      "total": 2,
      "total_with_caption": 2,
      "total_with_presentational": 0,
      "total_with_figcaption": 0
    },
    "file_extension_alts": {
      "total_elements_with_alt": 0,
      "total_elements_with_non_empty_alt": 0,
      "total_with_file_extension": 0,
      "file_extensions": {}
    },
    "title_and_alt": {
      "total_alt": 0,
      "total_title": 0,
      "total_both": 0,
      "total_alt_same_as_title": 0
    },
    "th_with_scope_attribute": {
      "total_th": 44,
      "total_with_scope": 8,
      "scopes": {
        "col": 4,
        "row": 4
      }
    },
    "td_with_headers_attribute": {
      "total_tds": 196,
      "total_with_headers": 98
    },
    "th_with_headers_attribute": {
      "total_ths": 44,
      "total_with_headers": 12
    },
    "total_anchors_with_role_button": 0,
    "total_role_tab_with_selected_and_controls": 0,
    "placeholder_but_no_label": {
      "total_placeholder": 0,
      "total_no_label": 0
    },
    "divs_or_spans_as_button_or_link": {
      "total_role_button": 0,
      "total_role_link": 0,
      "total_either": 0
    },
    "screen_reader_classes": false,
    "form_control_a11y_tree": [],
    "fieldset_radio_checkbox": {
      "total_radio": 0,
      "total_checkbox": 0,
      "total_radio_in_fieldset": 0,
      "total_checkbox_in_fieldset": 0,
      "fieldsets": []
    },
    "required_form_controls": []
  }
}