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node_modules/gulp-imagemin/readme.md
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node_modules/gulp-imagemin/readme.md
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# gulp-imagemin [](https://travis-ci.org/sindresorhus/gulp-imagemin)
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# gulp-imagemin
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> Minify PNG, JPEG, GIF and SVG images with [imagemin](https://github.com/kevva/imagemin)
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*Issues with the output should be reported on the imagemin [issue tracker](https://github.com/kevva/imagemin/issues).*
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> Minify PNG, JPEG, GIF and SVG images with [`imagemin`](https://github.com/imagemin/imagemin)
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*Issues with the output should be reported on the [`imagemin` issue tracker](https://github.com/imagemin/imagemin/issues).*
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## Install
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$ npm install --save-dev gulp-imagemin
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```
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## Usage
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```js
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const gulp = require('gulp');
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const imagemin = require('gulp-imagemin');
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const pngquant = require('imagemin-pngquant');
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### Basic
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gulp.task('default', () => {
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return gulp.src('src/images/*')
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.pipe(imagemin({
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progressive: true,
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svgoPlugins: [{removeViewBox: false}],
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use: [pngquant()]
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}))
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.pipe(gulp.dest('dist/images'));
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});
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```js
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import gulp from 'gulp';
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import imagemin from 'gulp-imagemin';
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export default () => (
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gulp.src('src/images/*')
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.pipe(imagemin())
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.pipe(gulp.dest('dist/images'))
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);
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```
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### Custom plugin options
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```js
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// …
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.pipe(imagemin([
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imagemin.gifsicle({interlaced: true}),
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imagemin.mozjpeg({quality: 75, progressive: true}),
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imagemin.optipng({optimizationLevel: 5}),
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imagemin.svgo({
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plugins: [
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{removeViewBox: true},
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{cleanupIDs: false}
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]
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})
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]))
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// …
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```
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### Custom plugin options and custom `gulp-imagemin` options
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```js
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// …
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.pipe(imagemin([
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imagemin.svgo({
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plugins: [
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{
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removeViewBox: true
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}
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]
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})
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], {
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verbose: true
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}))
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// …
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```
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## API
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Comes bundled with the following **lossless** optimizers:
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Comes bundled with the following optimizers:
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- [gifsicle](https://github.com/kevva/imagemin-gifsicle) — *Compress GIF images*
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- [jpegtran](https://github.com/kevva/imagemin-jpegtran) — *Compress JPEG images*
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- [optipng](https://github.com/kevva/imagemin-optipng) — *Compress PNG images*
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- [svgo](https://github.com/kevva/imagemin-svgo) — *Compress SVG images*
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- [gifsicle](https://github.com/imagemin/imagemin-gifsicle) — *Compress GIF images, lossless*
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- [mozjpeg](https://github.com/imagemin/imagemin-mozjpeg) — *Compress JPEG images, lossy*
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- [optipng](https://github.com/imagemin/imagemin-optipng) — *Compress PNG images, lossless*
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- [svgo](https://github.com/imagemin/imagemin-svgo) — *Compress SVG images, lossless*
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### imagemin([options])
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These are bundled for convenience and most users will not need anything else.
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### imagemin(plugins?, options?)
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Unsupported files are ignored.
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#### plugins
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Type: `Array`\
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Default: `[imagemin.gifsicle(), imagemin.mozjpeg(), imagemin.optipng(), imagemin.svgo()]`
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[Plugins](https://www.npmjs.com/browse/keyword/imageminplugin) to use. This will completely overwrite all the default plugins. So, if you want to use custom plugins and you need some of defaults too, then you should pass default plugins as well. Note that the default plugins come with good defaults and should be sufficient in most cases. See the individual plugins for supported options.
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#### options
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Options are applied to the correct files.
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Type: `object`
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##### optimizationLevel *(png)*
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##### verbose
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Type: `number`
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Default: `3`
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Select an optimization level between `0` and `7`.
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> The optimization level 0 enables a set of optimization operations that require minimal effort. There will be no changes to image attributes like bit depth or color type, and no recompression of existing IDAT datastreams. The optimization level 1 enables a single IDAT compression trial. The trial chosen is what. OptiPNG thinks it’s probably the most effective. The optimization levels 2 and higher enable multiple IDAT compression trials; the higher the level, the more trials.
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Level and trials:
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1. 1 trial
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2. 8 trials
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3. 16 trials
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4. 24 trials
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5. 48 trials
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6. 120 trials
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7. 240 trials
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##### progressive *(jpg)*
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Type: `boolean`
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Type: `boolean`\
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Default: `false`
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Lossless conversion to progressive.
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Enabling this will log info on every image passed to `gulp-imagemin`:
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##### interlaced *(gif)*
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```
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gulp-imagemin: ✔ image1.png (already optimized)
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gulp-imagemin: ✔ image2.png (saved 91 B - 0.4%)
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```
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Type: `boolean`
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##### silent
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Type: `boolean`\
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Default: `false`
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Interlace gif for progressive rendering.
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Don't log the number of images that have been minified.
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##### multipass *(svg)*
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Type: `boolean`
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Default: `false`
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Optimize svg multiple times until it's fully optimized.
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##### svgoPlugins *(svg)*
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Type: `array`
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Default: `[]`
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Customize which SVGO plugins to use. [More here](https://github.com/sindresorhus/grunt-svgmin#available-optionsplugins).
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##### use
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Type: `array`
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Default: `null`
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Additional [plugins](https://www.npmjs.com/browse/keyword/imageminplugin) to use with imagemin.
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## License
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MIT © [Sindre Sorhus](http://sindresorhus.com)
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You can also enable this from the command-line with the `--silent` flag if the option is not already specified.
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