file-type-lint

4.0.0 verified Fri May 01 auth: no javascript maintenance

Lint file types based on content rather than extension. Works with images, audio, video, archives, and many other formats. The latest stable version is 4.0.0 (released May 2020), which uses file-type v14.3.0 internally and requires Node.js >= 10.13.0. Unlike simple extension checks, it reads the file's content to verify its actual type. Current release cadence is low, with no updates since 2020.

Common errors

error Error: Cannot find module 'file-type-lint' ↓

cause Package not installed or not in node_modules.

fix

Run npm install file-type-lint --save-dev

error TypeError: fileTypeLint is not a function ↓

cause Using ES import syntax on a CJS module.

fix

Use require('file-type-lint') instead of import.

Warnings

breaking Minimum Node.js version is now 10.13.0 ↓

fix Upgrade Node.js to 10.13.0 or later.

gotcha Package is CommonJS only; cannot import with ES import syntax. ↓

fix Use require('file-type-lint') instead of import.

deprecated No active development; last release 2020 ↓

fix Consider using file-type directly or other modern alternatives.

Install

npm install file-type-lint

yarn add file-type-lint

pnpm add file-type-lint

Imports

default

wrong

import fileTypeLint from 'file-type-lint'

correct

const fileTypeLint = require('file-type-lint')

The package is CJS-only, no ESM or named export.

cli
wrong
```
file-type-lint
```
correct
```
npx file-type-lint .
```
CLI command requires at least a glob or directory as argument.

Quickstart

Shows the Node.js API usage to lint all files in the current directory by content type.

const fileTypeLint = require('file-type-lint');

fileTypeLint({ files: '**/*' })
  .then(result => {
    if (result.errored) {
      console.error('Errors found:', result.errors);
    } else {
      console.log('All files match their content types.');
    }
  })
  .catch(error => {
    console.error('Linting failed:', error);
  });