image-transmutation

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image-transmutation

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A script built with NodeJS that automatically converts and resizes your images based on the given arguments

image-transmutation 최신버젼 다운로드

최종 버전 다운로드 (.zip)

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# Image Transmutation 🧙💫

[![npm version](https://badge.fury.io/js/image-transmutation.svg)](https://raw.githubusercontent.com/matfantinel/image-transmutation/main/npmjs.com/package/image-transmutation)

This is a helper script built with NodeJS that automatically converts and resizes your images based on the given arguments. It uses [Sharp](https://github.com/lovell/sharp) to do the necessary conversions.

It is usable via command line, so you can add it to your package.json scripts after installing the NPM package.

I have written [a blog post about optimizing images](https://fantinel.dev/web-images-modern-formats/), which includes usage of this script, if you'd like to read more about use cases for it.

**Why transmutation?** Transmutation is the action of altering the properties of an object or being (or an image file). It is also a school of magic in many fantasy universes! 🎲

## Installation

Simply run 
```shell
npm install -D image-transmutation
```
to install it as a development dependency on your project.

### NodeJS version support

This package (v1.0.0) **requires NodeJS 18 or newer**. In case you need support for older NodeJS versions, you can use v0.1.3 by installing it with: `npm install -D image-transmutation@0.1.3`

## How to use

1. Once you install the NPM package, you can use it with the `image-transmutation` command.
2. I recommend adding it to your package.json scripts, like so:
```
"scripts": {
  "optimize-images": "image-transmutation --run --sourceFolder \"./source\" --targetFolder \"./target\" --inputFormats \"jpg\" --inputFormats \"jpeg\" --inputFormats \"png\" --outputFormats \"webp\" --outputFormats \"avif\" --widths 500 --widths 1000 --enlarge"
}
```
3. Run `npm run optimize-images` to execute the script.
4. You can add it to a "postbuild" script, so it runs automatically after your build process.

## Available arguments
```
  --help, -h        Displays this help text

--run, -r         Executes the script
    --sourceFolder      REQUIRED - The relative or absolute path to the folder where the images currently are.
    --targetFolder      REQUIRED - The relative or absolute path to the destination folder where the converted images will be saved at. Warning: all contents in the folder will be deleted prior to execution.
    --inputFormats      REQUIRED - The existing formats that the script will look for, like jpg and png.
    --outputFormats     REQUIRED - The formats the script will convert to.
    --widths            Optional - The widths to which the images will be resized to. If not declared, images will be kept at their original size. You can also declare "full" as one of the values to have a variant with the original width.
    --enlarge           Optional - Defines if images should be enlarged in case their original width is smaller than the target size defined on --widths.
    --clearTarget       Optional - Defines if the targetFolder should be cleared (all files deleted) before the optimization runs.
```

## Example command
This command runs using the folders built-in to this repository. It takes jpg, jpeg and png images and converts them into webp and avif, with widths of 500px and 1000px.

```
image-transmutation --run --sourceFolder "testing-room/source" --targetFolder "testing-room/target" --inputFormats "jpg" --inputFormats "jpeg" --inputFormats "png" --outputFormats "webp" --outputFormats "avif" --widths 500 --widths 1000 --enlarge
```

As a result:

```
/testing-room
  /source
    fluid.png
```

generates
```
/testing-room
  /target
    fluid-500w.avif
    fluid-500w.webp
    fluid-1000w.avif
    fluid-1000w.webp
```

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