colgroup span Count Calculator
Counts colgroup columns from normalized positive spans (at most 1000 each). When col children exist their spans determine the count and a group span attribute is nonconforming.
Description
Colgroup describes columns through its own span or through child col spans.
Colgroup describes columns through its own span or through child col spans. When children exist, their spans control the count.1
Counts colgroup columns from normalized positive spans (at most 1000 each). When col children exist their spans determine the count and a group span attribute is nonconforming.
When to use colgroup span Count Calculator
Use this for the following task: Counts colgroup columns from normalized positive spans (at most 1000 each). When col children exist their spans determine the count and a group span attribute is nonconforming.
Prepare the parsed attribute values, element states or ordered local lists requested below. Keep attribute presence separate from value.
How to use colgroup span Count Calculator and understand its results
- Prepare the parsed attribute values, element states or ordered local lists requested below. Keep attribute presence separate from value.
- Enter hasGroupSpan, groupSpan, childSpans using the field table, then run the tool.
- Read columnCount, groupSpanAllowed. Interpret flags, units, ordering and placeholder values using the rules below.
- Review any reported issue or failed check, correct the supplied values when appropriate, and verify the result in its intended context.
| Input field | Meaning | Value type and bounds | Requirement |
|---|---|---|---|
| hasGroupSpan | Has Group Span | boolean | Required |
| groupSpan | Group Span | integer; minimum 1; maximum 1000 | Required |
| childSpans | Child Spans | list of integer; minimum entries 0; maximum entries 10000; each entry: integer; minimum 1; maximum 1000 | Required |
Supply normalized positive spans. Sum child spans when nonempty and mark groupSpanAllowed false; otherwise apply the presence flag and default.2
columnCount = sum(childSpans), otherwise groupSpan if present, otherwise 1 This summarizes the declared operation. Units, indexing, inclusivity and exceptional cases are explained in the surrounding text.
| Output field | Meaning | Value type |
|---|---|---|
| columnCount | Column Count | integer |
| groupSpanAllowed | Group Span Allowed | boolean |
{
"input": {
"hasGroupSpan": false,
"groupSpan": 1,
"childSpans": [
2,
3
]
},
"output": {
"columnCount": 5,
"groupSpanAllowed": false
}
}Limitations and assumptions
Spans are limited to 1000 each. The tool does not parse tables or resolve actual cell positions.
This evaluates supplied local information; it does not fetch a page or run a browser. Malformed requests produce input errors. A successfully evaluated request can still contain false flags, empty result lists or a result outside the supplied threshold; those outcomes have the meanings stated above.
Alternative or Complementary methods
Choose td colspan/rowspan Grid Coverage Validator for this operation: Checks explicit cell rectangles within one bounded table row group using zero-based starts and normalized colspan/rowspan. Rowspan 0 reaches the group end. At most 10,000 grid slots and 1000 cells are allowed; this does not derive cell positions from HTML. For a complementary task, use caption vs summary Deprecated Lookup for this operation: Classifies a table caption element versus the obsolete summary attribute for current authoring conformance. This reports syntax status and caption semantics only.
Further background: HTML / accessibility reference: colgroup span Count Calculator.
References
Similar or alternative tools
- td colspan/rowspan Grid Coverage Validator
Checks explicit cell rectangles within one bounded table row group using zero-based starts and normalized colspan/rowspan. Rowspan 0 reaches the group end. At most 10,000 grid slots and 1000 cells are allowed; this does not derive cell positions from HTML.
- caption vs summary Deprecated Lookup
Classifies a table caption element versus the obsolete summary attribute for current authoring conformance. This reports syntax status and caption semantics only.