vaultmd / isFlatFrontmatter

Function: isFlatFrontmatter()

isFlatFrontmatter(fm): boolean

Defined in: src/frontmatter/validate.ts:41

Return true when every value in fm is a scalar (string, a finite number, boolean, or null) or an array of such scalars. Nested objects, nested arrays, Dates, and non-finite numbers (NaN, Infinity) all disqualify the frontmatter as non-flat — those values cannot survive a serialize/parse round-trip through the YAML core schema.

Parameters

fm

Record<string, unknown>

Frontmatter map to validate.

Returns

boolean

true if all values are flat-scalar-safe; false otherwise.