215 lines
12 KiB
Markdown
215 lines
12 KiB
Markdown
**english** | [русский](https://github.com/svg/svgo/blob/master/README.ru.md)
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- - -
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<img src="https://svg.github.io/svgo-logo.svg" width="200" height="200" alt="logo"/>
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## SVGO [](https://npmjs.org/package/svgo) [](https://travis-ci.org/svg/svgo) [](https://coveralls.io/r/svg/svgo?branch=master)
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**SVG O**ptimizer is a Nodejs-based tool for optimizing SVG vector graphics files.
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## Why?
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SVG files, especially those exported from various editors, usually contain a lot of redundant and useless information. This can include editor metadata, comments, hidden elements, default or non-optimal values and other stuff that can be safely removed or converted without affecting the SVG rendering result.
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## What it can do
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SVGO has a plugin-based architecture, so almost every optimization is a separate plugin.
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Today we have:
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| Plugin | Description |
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| ------ | ----------- |
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| [cleanupAttrs](https://github.com/svg/svgo/blob/master/plugins/cleanupAttrs.js) | cleanup attributes from newlines, trailing, and repeating spaces |
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| [inlineStyles](https://github.com/svg/svgo/blob/master/plugins/inlineStyles.js) | move and merge styles from `<style>` elements to element `style` attributes |
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| [removeDoctype](https://github.com/svg/svgo/blob/master/plugins/removeDoctype.js) | remove doctype declaration |
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| [removeXMLProcInst](https://github.com/svg/svgo/blob/master/plugins/removeXMLProcInst.js) | remove XML processing instructions |
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| [removeComments](https://github.com/svg/svgo/blob/master/plugins/removeComments.js) | remove comments |
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| [removeMetadata](https://github.com/svg/svgo/blob/master/plugins/removeMetadata.js) | remove `<metadata>` |
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| [removeTitle](https://github.com/svg/svgo/blob/master/plugins/removeTitle.js) | remove `<title>` |
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| [removeDesc](https://github.com/svg/svgo/blob/master/plugins/removeDesc.js) | remove `<desc>` |
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| [removeUselessDefs](https://github.com/svg/svgo/blob/master/plugins/removeUselessDefs.js) | remove elements of `<defs>` without `id` |
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| [removeXMLNS](https://github.com/svg/svgo/blob/master/plugins/removeXMLNS.js) | removes `xmlns` attribute (for inline svg, disabled by default) |
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| [removeEditorsNSData](https://github.com/svg/svgo/blob/master/plugins/removeEditorsNSData.js) | remove editors namespaces, elements, and attributes |
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| [removeEmptyAttrs](https://github.com/svg/svgo/blob/master/plugins/removeEmptyAttrs.js) | remove empty attributes |
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| [removeHiddenElems](https://github.com/svg/svgo/blob/master/plugins/removeHiddenElems.js) | remove hidden elements |
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| [removeEmptyText](https://github.com/svg/svgo/blob/master/plugins/removeEmptyText.js) | remove empty Text elements |
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| [removeEmptyContainers](https://github.com/svg/svgo/blob/master/plugins/removeEmptyContainers.js) | remove empty Container elements |
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| [removeViewBox](https://github.com/svg/svgo/blob/master/plugins/removeViewBox.js) | remove `viewBox` attribute when possible |
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| [cleanupEnableBackground](https://github.com/svg/svgo/blob/master/plugins/cleanupEnableBackground.js) | remove or cleanup `enable-background` attribute when possible |
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| [minifyStyles](https://github.com/svg/svgo/blob/master/plugins/minifyStyles.js) | minify `<style>` elements content with [CSSO](https://github.com/css/csso) |
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| [convertStyleToAttrs](https://github.com/svg/svgo/blob/master/plugins/convertStyleToAttrs.js) | convert styles into attributes |
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| [convertColors](https://github.com/svg/svgo/blob/master/plugins/convertColors.js) | convert colors (from `rgb()` to `#rrggbb`, from `#rrggbb` to `#rgb`) |
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| [convertPathData](https://github.com/svg/svgo/blob/master/plugins/convertPathData.js) | convert Path data to relative or absolute (whichever is shorter), convert one segment to another, trim useless delimiters, smart rounding, and much more |
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| [convertTransform](https://github.com/svg/svgo/blob/master/plugins/convertTransform.js) | collapse multiple transforms into one, convert matrices to the short aliases, and much more |
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| [removeUnknownsAndDefaults](https://github.com/svg/svgo/blob/master/plugins/removeUnknownsAndDefaults.js) | remove unknown elements content and attributes, remove attrs with default values |
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| [removeNonInheritableGroupAttrs](https://github.com/svg/svgo/blob/master/plugins/removeNonInheritableGroupAttrs.js) | remove non-inheritable group's "presentation" attributes |
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| [removeUselessStrokeAndFill](https://github.com/svg/svgo/blob/master/plugins/removeUselessStrokeAndFill.js) | remove useless `stroke` and `fill` attrs |
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| [removeUnusedNS](https://github.com/svg/svgo/blob/master/plugins/removeUnusedNS.js) | remove unused namespaces declaration |
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| [prefixIds](https://github.com/svg/svgo/blob/master/plugins/prefixIds.js) | prefix IDs and classes with the SVG filename or an arbitrary string |
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| [cleanupIDs](https://github.com/svg/svgo/blob/master/plugins/cleanupIDs.js) | remove unused and minify used IDs |
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| [cleanupNumericValues](https://github.com/svg/svgo/blob/master/plugins/cleanupNumericValues.js) | round numeric values to the fixed precision, remove default `px` units |
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| [cleanupListOfValues](https://github.com/svg/svgo/blob/master/plugins/cleanupListOfValues.js) | round numeric values in attributes that take a list of numbers (like `viewBox` or `enable-background`) |
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| [moveElemsAttrsToGroup](https://github.com/svg/svgo/blob/master/plugins/moveElemsAttrsToGroup.js) | move elements' attributes to their enclosing group |
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| [moveGroupAttrsToElems](https://github.com/svg/svgo/blob/master/plugins/moveGroupAttrsToElems.js) | move some group attributes to the contained elements |
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| [collapseGroups](https://github.com/svg/svgo/blob/master/plugins/collapseGroups.js) | collapse useless groups |
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| [removeRasterImages](https://github.com/svg/svgo/blob/master/plugins/removeRasterImages.js) | remove raster images (disabled by default) |
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| [mergePaths](https://github.com/svg/svgo/blob/master/plugins/mergePaths.js) | merge multiple Paths into one |
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| [convertShapeToPath](https://github.com/svg/svgo/blob/master/plugins/convertShapeToPath.js) | convert some basic shapes to `<path>` |
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| [convertEllipseToCircle](https://github.com/svg/svgo/blob/master/plugins/convertEllipseToCircle.js) | convert non-eccentric `<ellipse>` to `<circle>` |
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| [sortAttrs](https://github.com/svg/svgo/blob/master/plugins/sortAttrs.js) | sort element attributes for epic readability (disabled by default) |
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| [sortDefsChildren](https://github.com/svg/svgo/blob/master/plugins/sortDefsChildren.js) | sort children of `<defs>` in order to improve compression |
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| [removeDimensions](https://github.com/svg/svgo/blob/master/plugins/removeDimensions.js) | remove `width`/`height` and add `viewBox` if it's missing (opposite to removeViewBox, disable it first) (disabled by default) |
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| [removeAttrs](https://github.com/svg/svgo/blob/master/plugins/removeAttrs.js) | remove attributes by pattern (disabled by default) |
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| [removeAttributesBySelector](https://github.com/svg/svgo/blob/master/plugins/removeAttributesBySelector.js) | removes attributes of elements that match a css selector (disabled by default) |
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| [removeElementsByAttr](https://github.com/svg/svgo/blob/master/plugins/removeElementsByAttr.js) | remove arbitrary elements by ID or className (disabled by default) |
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| [addClassesToSVGElement](https://github.com/svg/svgo/blob/master/plugins/addClassesToSVGElement.js) | add classnames to an outer `<svg>` element (disabled by default) |
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| [addAttributesToSVGElement](https://github.com/svg/svgo/blob/master/plugins/addAttributesToSVGElement.js) | adds attributes to an outer `<svg>` element (disabled by default) |
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| [removeOffCanvasPaths](https://github.com/svg/svgo/blob/master/plugins/removeOffCanvasPaths.js) | removes elements that are drawn outside of the viewbox (disabled by default) |
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| [removeStyleElement](https://github.com/svg/svgo/blob/master/plugins/removeStyleElement.js) | remove `<style>` elements (disabled by default) |
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| [removeScriptElement](https://github.com/svg/svgo/blob/master/plugins/removeScriptElement.js) | remove `<script>` elements (disabled by default) |
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| [reusePaths](https://github.com/svg/svgo/blob/master/plugins/reusePaths.js) | Find duplicated <path> elements and replace them with <use> links (disabled by default) |
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Want to know how it works and how to write your own plugin? [Of course you want to](https://github.com/svg/svgo/blob/master/docs/how-it-works/en.md). ([동작방법](https://github.com/svg/svgo/blob/master/docs/how-it-works/ko.md))
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## Installation
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```sh
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$ [sudo] npm install -g svgo
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```
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## Usage
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### <abbr title="Command Line Interface">CLI</abbr>
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```
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Usage:
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svgo [OPTIONS] [ARGS]
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Options:
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-h, --help : Help
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-v, --version : Version
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-i INPUT, --input=INPUT : Input file, "-" for STDIN
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-s STRING, --string=STRING : Input SVG data string
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-f FOLDER, --folder=FOLDER : Input folder, optimize and rewrite all *.svg files
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-o OUTPUT, --output=OUTPUT : Output file or folder (by default the same as the input), "-" for STDOUT
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-p PRECISION, --precision=PRECISION : Set number of digits in the fractional part, overrides plugins params
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--config=CONFIG : Config file or JSON string to extend or replace default
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--disable=PLUGIN : Disable plugin by name, "--disable=PLUGIN1,PLUGIN2" for multiple plugins
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--enable=PLUGIN : Enable plugin by name, "--enable=PLUGIN3,PLUGIN4" for multiple plugins
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--datauri=DATAURI : Output as Data URI string (base64, URI encoded or unencoded)
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--multipass : Pass over SVGs multiple times to ensure all optimizations are applied
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--pretty : Make SVG pretty printed
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--indent=INDENT : Indent number when pretty printing SVGs
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-r, --recursive : Use with '-f'. Optimizes *.svg files in folders recursively.
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-q, --quiet : Only output error messages, not regular status messages
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--show-plugins : Show available plugins and exit
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Arguments:
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INPUT : Alias to --input
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```
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* with files:
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```sh
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$ svgo test.svg
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```
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or:
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```sh
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$ svgo *.svg
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```
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```sh
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$ svgo test.svg -o test.min.svg
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```
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```sh
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$ svgo test.svg other.svg third.svg
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```
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```sh
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$ svgo test.svg other.svg third.svg -o test.min.svg -o other.min.svg -o third.min.svg
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```
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* with STDIN / STDOUT:
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```sh
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$ cat test.svg | svgo -i - -o - > test.min.svg
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```
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* with folder
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```sh
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$ svgo -f ../path/to/folder/with/svg/files
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```
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or:
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```sh
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$ svgo -f ../path/to/folder/with/svg/files -o ../path/to/folder/with/svg/output
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```
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```sh
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$ svgo *.svg -o ../path/to/folder/with/svg/output
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```
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* with strings:
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```sh
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$ svgo -s '<svg version="1.1">test</svg>' -o test.min.svg
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```
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or even with Data URI base64:
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```sh
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$ svgo -s 'data:image/svg+xml;base64,...' -o test.min.svg
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```
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* with SVGZ:
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from `.svgz` to `.svg`:
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```sh
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$ gunzip -c test.svgz | svgo -i - -o test.min.svg
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```
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from `.svg` to `.svgz`:
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```sh
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$ svgo test.svg -o - | gzip -cfq9 > test.svgz
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```
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### Other Ways to Use SVGO
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* as a web app – [SVGOMG](https://jakearchibald.github.io/svgomg/)
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* as a Nodejs module – [examples](https://github.com/svg/svgo/tree/master/examples)
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* as a Grunt task – [grunt-svgmin](https://github.com/sindresorhus/grunt-svgmin)
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* as a Gulp task – [gulp-svgmin](https://github.com/ben-eb/gulp-svgmin)
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* as a Mimosa module – [mimosa-minify-svg](https://github.com/dbashford/mimosa-minify-svg)
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* as an OSX Folder Action – [svgo-osx-folder-action](https://github.com/svg/svgo-osx-folder-action)
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* as a webpack loader – [image-webpack-loader](https://github.com/tcoopman/image-webpack-loader)
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* as a Telegram Bot – [svgo_bot](https://github.com/maksugr/svgo_bot)
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* as a PostCSS plugin – [postcss-svgo](https://github.com/ben-eb/postcss-svgo)
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* as an Inkscape plugin – [inkscape-svgo](https://github.com/konsumer/inkscape-svgo)
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* as a Sketch plugin - [svgo-compressor](https://github.com/BohemianCoding/svgo-compressor)
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* as macOS app - [Image Shrinker](https://image-shrinker.com)
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* as a Rollup plugin - [rollup-plugin-svgo](https://github.com/porsager/rollup-plugin-svgo)
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## Backers
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| [<img src="https://sheetjs.com/sketch128.png" width="80">](https://sheetjs.com/) | [<img src="https://rawgithub.com/fontello/fontello/master/fontello-image.svg" width="80">](http://fontello.com/) |
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|:-:|:-:|
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| [SheetJS LLC](https://sheetjs.com/) | [Fontello](http://fontello.com/) |
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## Donations
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- PayPal: https://www.paypal.me/deepsweet
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## License and Copyright
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This software is released under the terms of the [MIT license](https://github.com/svg/svgo/blob/master/LICENSE).
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Logo by [Yegor Bolshakov](http://xizzzy.ru/).
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