Minify PNG, JPG, GIF and SVG i
InstallMinify images using imagemin
npm install --save-dev grunt-contrib-imagemin Usage
const mozjpeg = require('imagemin-mozjpeg');
grunt.initConfig({
imagemin: {
static: {
options: {
optimizationLevel: 3,
svgoPlugins: [{removeViewBox: false}],
use: [mozjpeg()] // Example plugin usage
},
files: {
'dist/img.png': 'src/img.png',
'dist/img.jpg': 'src/img.jpg',
'dist/img.gif': 'src/img.gif'
}
},
dynamic: {
files: [{
expand: true,
cwd: 'src/',
src: ['**/*.{png,jpg,gif}'],
dest: 'dist/'
}]
}
}
});
grunt.loadNpmTasks('grunt-contrib-imagemin');
grunt.registerTask('default', ['imagemin']);
Options
optimizationLevel (png)
Type: number
Default: 3
Select optimization level between 0 and 7.
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.
Level and trials:
1 trial 8 trials 16 trials 24 trials 48 trials 120 trials 240 trials progressive (jpg) Type:boolean
Default: true
Lossless conversion to progressive.
interlaced (gif) Type:boolean
Default: true
Interlace gif for progressive rendering.
svgoPlugins (svg)Type: Array
Customize which SVGO plugins to use. More here.
use Type:Array
Default: [imagemin.gifsicle(), imagemin.jpegtran(), imagemin.optipng(), imagemin.svgo()]
Plugins to use with imagemin. It comes bundled with the following lossless optimizers:
gifsicle — Compress GIF images jpegtran — Compress JPEG images optipng — Compress PNG images svgo — Compress SVG imagesThese are bundled for convenience and most users will not need anything else.
concurrency Type:number
Default: os.cpus().length
Control the maximum number of image optimizations that may be performed in parallel.
LicenseMIT © Sindre Sorhus
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