# imagemin-zopfli [![Build Status](https://travis-ci.org/imagemin/imagemin-zopfli.svg?branch=master)](https://travis-ci.org/imagemin/imagemin-zopfli)

> [Zopfli](https://en.wikipedia.org/wiki/Zopfli) imagemin plugin


## Install

```
$ npm install --save imagemin-zopfli
```


## Usage

```js
const imagemin = require('imagemin');
const imageminZopfli = require('imagemin-zopfli');

imagemin(['images/*.png'], 'build/images', {
	use: [
		imageminZopfli({more: true})
	]
}).then(() => {
	console.log('Images optimized');
});
```


## API

### imageminZopfli([options])(buffer)

#### options

Type: `Object`

##### 8bit

Type: `boolean`<br>
Default: `false`

Convert 16-bit per channel image to 8-bit per channel.

##### transparent

Type: `boolean`<br>
Default: `false`

Allow altering hidden colors of fully transparent pixels.

##### iterations

Type: `integer`<br>
Default: `15`

Number of iterations for images smaller than 200 KiB.

##### more

Type: `boolean`<br>
Default: `false`

Compress more using more iterations (depending on file size).

#### buffer

Type: `Buffer`

Buffer to optimize.


## License

MIT © [imagemin](https://github.com/imagemin)


imagemin-zopfli

1000ch

shinnn

kevva

sindresorhus

nothingismagick

xhmikosr

bradbaris

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What is an ambiguous license classifier?

Ambiguous License Classifier

Source files are encoded using a non-standard text encoding.

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Bad text encoding

Package version is not a valid semantic version (semver).

What is bad semver?

Bad semver

Package has dependencies with an invalid semantic version. This could be a sign of beta, low quality, or unmaintained dependencies.

What is bad dependency semver?

Bad dependency semver

Source files contain bidirectional unicode control characters. This could indicate a Trojan source supply chain attack. See: trojansource.codes for more information.

What are bidirectional unicode control characters?

Bidirectional unicode control characters

This package has multiple bin scripts with the same name. This can cause non-deterministic behavior when installing or could be a sign of a supply chain attack.

What is bin script confusion?

Bin script confusion

This Chrome extension includes content scripts that execute JavaScript on specified websites.

What are Chrome extension content scripts?

Chrome Extension Content Script

This Chrome extension requests host permissions to access specific websites or domains.

What are Chrome extension host permissions?

Chrome Extension Host Permission

This Chrome extension requests permissions to access browser APIs, user data, or system features.

What are Chrome extension permissions?

Chrome Extension Permission

This Chrome extension requests wildcard host permissions that grant broad access to websites.

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Chrome Extension Wildcard Host Permission

Semantic versions published out of chronological order.

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Chronological version anomaly

Project maintainer's SSH key has been compromised.

What is a compromised SSH key?

Compromised SSH key

(Experimental) Copyleft license information was found.

What do I need to know about license files?

Copyleft License

Contains a Critical Common Vulnerability and Exposure (CVE).

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Title

Critical CVE

Contains a high severity Common Vulnerability and Exposure (CVE).

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High CVE

Uses debug, reflection and dynamic code execution features.

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Debug access

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Deprecated

(Experimental) Contains a known deprecated SPDX license exception.

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Deprecated SPDX exception

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Deprecated license

Package name is similar to other popular packages and may not be the package you want.

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Possible typosquat attack

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Dynamic require

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Empty package

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Environment variable access

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Name

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File dependency

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Filesystem access

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What are wildcard dependencies?

Wildcard dependency

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Git dependency

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GitHub dependency

AI has identified unusual behaviors that may pose a security risk.

What is an AI-detected potential code anomaly?

AI-detected potential code anomaly

AI has identified this package as a potential typosquat of a more popular package. This suggests that the package may be intentionally mimicking another package's name, description, or other metadata.

What is AI-detected potential typosquatting?

AI-detected possible typosquat

AI has identified this package as malware. This is a strong signal that the package may be malicious.

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AI-detected potential malware

AI has determined that this package may contain potential security issues or vulnerabilities.

What are AI-detected potential security risks?

AI-detected potential security risk

Contains native code (e.g., compiled binaries or shared libraries). Including native code can obscure malicious behavior.

Why is native code a concern?

Native code

Contains high entropy strings. This could be a sign of encrypted data, leaked secrets or obfuscated code.

What are high entropy strings?

High entropy strings

Contains unicode homoglyphs which can be used in supply chain confusion attacks.

What are unicode homoglyphs?

Unicode homoglyphs

Contains a dependency which resolves to a remote HTTP URL which could be used to inject untrusted code and reduce overall package reliability.

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HTTP dependency

Install scripts are run when the package is installed. The majority of malware in npm is hidden in install scripts.

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Install scripts

Package has an invalid manifest file and can cause installation problems if you try to use it.

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Invalid manifest file

Source files contain invisible characters. This could indicate source obfuscation or a supply chain attack.

What are invisible characters?

Invisible chars

(Experimental) Package license has recently changed.

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License change

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License exception

This package is not allowed per your license policy. Review the package's license to ensure compliance.

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License Policy Violation

Contains long string literals, which may be a sign of obfuscated or packed code.

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Long strings

Package has recently undergone a major refactor. It may be unstable or indicate significant internal changes. Use caution when updating to versions that include significant changes.

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Major refactor

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Known malware

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Manifest confusion

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Medium CVE

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Low CVE

This package contains minified code. This may be harmless in some cases where minified code is included in packaged libraries, however packages on npm should not minify code.

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Minified code

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Misc. License Issues

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Non-existent author

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Missing dependency

(Experimental) Package does not have a license and consumption legal status is unknown.

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Missing license

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(Experimental) Package contains multiple licenses.

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Mixed license

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Modified license exception

(Experimental) Package contains a modified version of an SPDX license. Please read carefully before using this code.

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Modified license

What is network access?

Network access

A new npm collaborator published a version of the package for the first time. New collaborators are usually benign additions to a project, but do indicate a change to the security surface area of a package.

imagemin-zopfli

imagemin-zopfli

Install

Usage

API

imageminZopfli([options])(buffer)

options

8bit

transparent

iterations

more

buffer

License

Keywords

Related posts

imagemin-zopfli

Install

Usage

API

imageminZopfli([options])(buffer)

options

8bit

transparent

iterations

more

buffer

License

Keywords

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