davidwindham.com
forked from
npmx.dev/npmx.dev
[READ-ONLY]
a fast, modern browser for the npm registry
1export function parseBasicFrontmatter(fileContent: string): Record<string, unknown> {
2 const match = fileContent.match(/^---[ \t]*\n([\s\S]*?)\n---[ \t]*(?:\n|$)/)
3 if (!match?.[1]) return {}
4
5 return match[1].split('\n').reduce<Record<string, unknown>>((acc, line) => {
6 const idx = line.indexOf(':')
7 if (idx === -1) return acc
8
9 const key = line.slice(0, idx).trim()
10
11 // Remove surrounding quotes
12 let value = line
13 .slice(idx + 1)
14 .trim()
15 .replace(/^["']|["']$/g, '')
16
17 // Type coercion (handles 123, 45.6, boolean, arrays)
18 if (value === 'true') acc[key] = true
19 else if (value === 'false') acc[key] = false
20 else if (/^-?\d+$/.test(value)) acc[key] = parseInt(value, 10)
21 else if (/^-?\d+\.\d+$/.test(value)) acc[key] = parseFloat(value)
22 else if (value.startsWith('[') && value.endsWith(']')) {
23 acc[key] = value
24 .slice(1, -1)
25 .split(',')
26 .map(s => s.trim().replace(/^["']|["']$/g, ''))
27 } else acc[key] = value
28
29 return acc
30 }, {})
31}