JSTF table

Defines justification rules — glyph and language-level adjustments for justified text layout.

Scope

• Format family: Shared SFNT
• Table tag in JSON: JSTF

Specs

• (No explicit spec URL found in implementation source)
• OpenType table registry: https://learn.microsoft.com/en-us/typography/opentype/spec/otff#font-tables

JSON Skeleton

This skeleton reflects fields currently parsed/written by Font Flux JS for this table.

{
  "tables": {
    "JSTF": {
      "majorVersion": 0,
      "minorVersion": 0,
      "scripts": null,
      "_checksum": 0
    }
  }
}

Top-level Fields

• majorVersion - number (0..65535)
• minorVersion - number (0..65535)
• scripts - implementation-defined

Additional Nested Keys Seen In Implementation

• tag
• offset
• table

Notes

• Preserve _checksum for stable round-tripping.
• If a table is only partially understood, prefer keeping unknown bytes in _raw instead of dropping data.
• Validate with .validate() after edits.