# Parameters

Review Thulite Images module parameters for default decoding, fetch priority, loading, widths, sizes, processing, and LQIP behavior.

This reference guide describes the Images module parameters, which can be set in `config/_default/params.toml`.

## Example

```toml {title="config/_default/params.toml"}
# Images (@thulite/images)
[thulite_images]
  [thulite_images.defaults]
    decoding = "async" # sync, async, or auto (default)
    fetchpriority = "auto" # high, low, or auto (default)
    loading = "lazy" # eager or lazy (default)
    widths = [480, 576, 768, 1025, 1200, 1440] # [640, 768, 1024, 1366, 1600, 1920] for example
    sizes = "auto" # 100vw (default), 75vw, or auto for example
    process = "" # "fill 1600x900" or "fill 2100x900" for example
    lqip = "16x webp q20" # "16x webp q20" or "21x webp q20" for example
```

## thulite_images.defaults

Default rendering and processing parameters for generated images.

### decoding

The default [decoding](https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/decoding) hint applied to generated `img` elements. A string — valid values are `sync`, `async`, and `auto`. Default is `"async"`.

### fetchpriority

The default [fetch priority](https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/fetchPriority) hint applied to generated `img` elements. A string — valid values are `high`, `low`, and `auto`. Default is `"auto"`.

### loading

The default [loading](https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/loading) behavior applied to generated `img` elements. A string — valid values are `eager` and `lazy`. Default is `"lazy"`.

### widths

The responsive image widths used to build `srcset` candidates. An array of integers ordered from smallest to largest — default is `[480, 576, 768, 1025, 1200, 1440]`.

### sizes

The default value used for the `sizes` attribute on responsive images. A string — for example `"auto"` or `"75vw"`. Default is `"auto"`.

### process

The default Hugo image [processing](https://gohugo.io/content-management/image-processing/#processing) specification applied to the main generated image. A string — for example `"fill 1600x900"`. Default is `""`.

### lqip

The default Hugo [resize](https://gohugo.io/methods/resource/resize/) specification used to generate the low-quality image placeholder. A string — for example `"16x webp q20"`. Default is `"16x webp q20"`.