prefer-numeric-literals-over-parseint-radix

Replaces parseInt() and Number.parseInt() calls that parse static base-2, base-8, or base-16 strings with equivalent 0b, 0o, and 0x numeric literals when the result is semantically safe.

What It Rewrites

js
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parseInt("1010", 2)
// becomes
0b1010

Number.parseInt("755", 8)
// becomes
0o755

parseInt("   -ff   ", 16)
// becomes
(-0xff)

Safety Rules

• Only rewrites calls with exactly 2 arguments.
• Only rewrites string literals or template literals with no expressions.
• Only rewrites radix literals that evaluate to 2, 8, or 16.
• Requires the trimmed payload to be entirely valid digits for that radix.
• Preserves hex digit casing from the source string.
• Skips shadowed parseInt bindings and shadowed Number.parseInt receivers.
• Skips partial parses, prefixed payloads like "0xFF", and negative-zero inputs such as "-0".

Target Files

• *.js, *.cjs, *.mjs
• *.ts, *.cts, *.mts
• *.jsx, *.tsx

Usage

bash
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pnpm dlx codemod@latest workflow run -w . -t /path/to/project

Development

bash
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pnpm test
pnpm run validate
pnpm run check-types

License

MIT