This section summarizes the categories checked by the extension and maps them to WCAG 2.1 AA.
Image¶
| No. | Rule ID | Description | WCAG |
|---|---|---|---|
| 1a | image-missing-alt | Ensure the presence of alt text in images which are embedded in markdown. | WCAG 1.1.1 |
Heading¶
| No. | Rule ID | Description | WCAG |
|---|---|---|---|
| 2a | heading-missing-h1 | Ensure the presence of H1 tag in a notebook | WCAG 2.4.2 |
| 2b | heading-multiple-h1 | Ensure there is only one H1 tag in a notebook | WCAG 2.4.6 |
| 2c | heading-duplicate-h2 | Ensure no two H2 headings share the same content | WCAG 2.4.6 |
| 2d | heading-duplicate-h1-h2 | Ensure no two H1 and H2 headings share the same content | WCAG 2.4.6 |
| 2e | heading-wrong-order | Ensure the order of heading is accurate | WCAG 2.4.6 |
| 2f | heading-empty | Ensure the heading content is non-empty | WCAG 2.4.6 |
Table¶
| No. | Rule ID | Description | WCAG |
|---|---|---|---|
| 3a | table-missing-header | Ensure row and column headers are present in a table | WCAG 1.3.1 |
| 3b | table-missing-caption | Ensure caption was added for a table | WCAG 1.3.1 |
| 3c | table-missing-scope | Ensure presence of scope attribute for rows and columns | WCAG 1.3.1 |
Color¶
| No. | Rule ID | Description | WCAG |
|---|---|---|---|
| 4a | color-insufficient-cc-normal | Ensure normal text in images have a contrast ratio of 4.5:1 and text contrast in general | WCAG 1.4.3 |
| 4b | color-insufficient-cc-large | Ensure large text in images have a contrast ratio of 3:1 | WCAG 1.4.3 |
Links¶
| No. | Rule ID | Description | WCAG |
|---|---|---|---|
| 4a | link-discernible-text | Ensure that the purpose of each link can be determined from the link text alone or from the link text together with its programmatically determined link context | WCAG 2.4.4 |