Description
Check one Unicode scalar against the executing runtime Grapheme_Extend binary property.
Text positions can be measured in UTF-16 code units, Unicode code points, grapheme clusters, or modeled display columns. These coordinates are not interchangeable. Invisible markers and delimiter policies can also affect interpretation even when a string looks unchanged, so the chosen representation needs to stay explicit.
Check one Unicode scalar against the executing runtime Grapheme_Extend binary property.
When to use this tool
Use Unicode Grapheme Extend Property Token when you need the stated marker, coordinate, delimiter, or normalization operation under an explicit text representation.
How to use the tool and how it works
- Enter text. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read extend, scalar. Inspect extend before interpreting the associated values.
Require text to contain exactly one valid Unicode scalar and return its numeric scalar plus JavaScript's Grapheme_Extend property result.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| text | Text | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| extend | Runtime Grapheme_Extend property, not a whole-cluster flag. | Required. Boolean. |
| scalar | Scalar | Required. Safe integer. |
{
"input": {
"text": "́"
},
"output": {
"extend": true,
"scalar": 769
}
}Limitations and assumptions
- The property uses runtime Unicode data and differs from General_Category Mark. A true result alone does not identify a whole grapheme cluster or validate placement next to other characters.
- The field tables state structural bounds; the mechanics also specify cross-field constraints. Malformed inputs and unsupported domains cause errors. A successful false flag, empty branch value, or zero placeholder has the meaning stated above and is distinct from an input error.
Alternative or Complementary methods
Choose the coordinate system required by the consumer. Use a full parser, renderer, or segmentation method when a local marker or delimiter rule cannot determine the complete text behavior.
References
Similar or alternative tools
- Grapheme Boundary Side Token
Locate an offset relative to caller-supplied grapheme boundaries; no Unicode segmentation is inferred.
- Grapheme Cursor Mid Cluster Flag
Segment text using Intl.Segmenter with locale en and grapheme granularity.