# exif-wasm

Extracts Exif metadata from images using WebAssembly. Uses the Rust package [kamadak-exif](https://crates.io/crates/kamadak-exif) internally for parsing and extracting the Exif metadata.

Supported formats:
- JPEG
- PNG
- TIFF
- WebP
- HEIF (HEIC and AVIF)

## Installation

This package can be installed via:

```bash
npm install --save exif-wasm
```

## Usage

```typescript
import init, { get_exif } from 'exif-wasm';

// Initialize the Exif WebAssembly module
init()
    .then(() => console.debug('Exif WebAssembly module loaded'))
    .catch(error => console.error('Exif WebAssembly module failed to load with error:', error));

// Download the image & extract Exif metadata
fetch('image.jpg')
    .then(res => res.buffer())
    .then(bytes => new Uint8Array(bytes))
    .then(array => get_exif(array))
    .then(console.log);
```

The output will be in the format:

```javascript
let exif = {
    success: true,
    error_type: null,
    error_message: null,
    fields: [
        {
            tag: {
                id: 306,
                name: "File change date and time",
                default_value: null
            },
            value: "2022-12-31 12:00:00"
        },
        ...
    ]
}
```