Function canonicalizeVarName

packages/extension/utils/css.ts:935–954

(value: string)

}

export function canonicalizeVarName(value: string): string | null {
  if (!value) return null
  const cleaned = stripFallback(preprocessCssValue(value)).trim()

  if (cleaned.startsWith('var(') && cleaned.endsWith(')')) {
    // stripFallback() guarantees we have no comma at top-level.
    let inner = cleaned.slice(4, -1).trim()
    if (inner.startsWith('--')) {
      inner = inner.slice(2).trim()
      return normalizeCustomPropertyName(inner)
    }
    return null
  }

  if (cleaned.startsWith('--')) {
    return normalizeCustomPropertyName(cleaned)
  }

  return null
}

export function toVarExpr(name: string): string {
  return `var(${normalizeCustomPropertyName(name)})`