how to config grunt.js to minify files separately
JavascriptCompressionGruntjsJavascript Problem Overview
there are some js files in static/js/
1. a.js
2. b.js
3. c.js
how to config grunt.js to get below files:
1. a.min.js
2. b.min.js
3. c.min.js
as far, I have to type specific file name:
min: {
dist: {
src: 'js/**/*.js',
dest: 'js/min/xxx.min.js'
}
}
Javascript Solutions
Solution 1 - Javascript
Had the same problem and found a solution that would automatically minify all my scripts separately:
uglify: {
build: {
files: [{
expand: true,
src: '**/*.js',
dest: 'build/scripts',
cwd: 'app/scripts'
}]
}
}
Solution 2 - Javascript
In grunt 0.4 you can specify multiple dest/src pairs like this:
uglify: {
dist: {
files: {
'dist/main.js': 'src/main.js',
'dist/widget.js': 'src/widget.js'
}
}
}
Solution 3 - Javascript
Or you can use expandMapping, like this:
min: {
files: grunt.file.expandMapping(['path/*.js', 'path2/*.js'], 'destination/', {
rename: function(destBase, destPath) {
return destBase+destPath.replace('.js', '.min.js');
}
})
}
And the output:
path/test.js => destination/path/test.min.js
path2/foo.js => destination/path2/foo.min.js
Solution 4 - Javascript
This below gruntjs works for me for creating minified files for all the js files under a dir
module.exports = function(grunt) {
// Project configuration.
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
uglify: {
build: {
files: [{
expand: true,
src: '**/*.js',
dest: 'build/scripts',
cwd: 'public_html/app',
ext: '.min.js'
}]
}
}
});
// Load the plugin that provides the "uglify" task.
grunt.loadNpmTasks('grunt-contrib-uglify');
// Default task(s).
grunt.registerTask('default', ['uglify']);
};
Solution 5 - Javascript
From the grunt docs for min:
> This task is a multi task, meaning that grunt will automatically > iterate over all min targets if a target is not specified.
So you can do this:
min: {
min_a: {
src: 'a.js',
dest: 'a.min.js'
},
min_b: {
src: 'b.js',
dest: 'b.min.js'
},
min_c: {
src: 'c.js',
dest: 'c.min.js'
}
There's nothing special about the name 'dist' for these tasks.
Solution 6 - Javascript
Use the ext option to name the files .min.js instead of .js
uglify: {
build: {
files: [{
expand: true,
src: '**/*.js',
dest: 'build/scripts',
cwd: 'app/scripts',
ext: '.min.js'
}]
}
}
Solution 7 - Javascript
For explicitly export some files into separate output files (in this case all.min.js and all.jquery.js) use:
uglify: {
js: {
files : {
'js/all.min.js' : [
'js/modernizr.js',
'js/vendor/modernizr-2.6.2-respond-1.1.0.min.js',
'js/bootstrap.min.js',
'js/main.js',
'js/ZeroClipboard.min.js',
'js/bootstrap-datepicker/bootstrap-datepicker.js'
],
'js/all.jquery.js' : [
'js/vendor/jquery-1.9.1.js',
'js/vendor/jquery-migrate-1.2.1.js',
'js/vendor/jquery-ui.js'
]
}
},
options: {
banner: '\n/*! <%= pkg.name %> <%= grunt.template.today("dd-mm-yyyy") %> */\n',
preserveComments: 'some',
report: 'min'
}
},
Solution 8 - Javascript
I like to keep the original files and also create uglified ones:
uglify: {
dist: {
files: [{
expand: true,
src: '**/*.js',
dest: 'destdir',
cwd: 'srcdir',
rename: function(dest, src) { return dest + '/' + src.replace('.js', '.min.js'); }
}]
}
},
Solution 9 - Javascript
You also can use copy and grunt-mindirect.
copy: {
dist: {
src: 'a.js',
dest: 'a.min.js'
}
},
minidirect: {
all: 'js/min/*.min.js'
}
This should work.
Solution 10 - Javascript
I guess it only matters for watch tasks.
In grunt 0.4 you can do this
var filesA = 'a.js', filesB = 'b.js', filesC = 'c.js';
...
min: {
min_a: {
src: filesA,
dest: 'a.min.js'
},
min_b: {
src: filesB,
dest: 'b.min.js'
},
min_c: {
src: filesC,
dest: 'c.min.js'
}
watch: {
min_a: {
files: filesA,
tasks: ['min:min_a']
},
min_b: {
files: filesB,
tasks: ['min:min_b']
},
min_c: {
files: filesC,
tasks: ['min:min_c']
}
}
After that just start grunt watch and all will be fine automagically.
Solution 11 - Javascript
In an intention to help others who come to this page in future -
I came across a video which explains on how to minify JS files using Grunt JS here: https://www.youtube.com/watch?v=Gkv7pA0PMJQ
The source code is made available here: http://www.techcbt.com/Post/359/Grunt-JS/how-to-minify-uglify-javascript-files-using-grunt-js
Just in case, if the above links are not working:
- You can minify all javascript files and combine/concat into one file using the following script:
module.exports = function(grunt){
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
uglify:{
t1:{
files:{
'dest/all.min.js': ['src/app.js', 'src/one.js', 'src/t/two.js']
}
}
}
});
};
- If you would like to have source maps also generated, you can enable "sourceMap" option as follows:
module.exports = function(grunt){
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
uglify:{
t1:{
options : {
sourceMap : true,
},
files:{
'dest/all.min.js': ['src/app.js', 'src/one.js', 'src/t/two.js']
}
}
}
});
};
- In order to retain entire folder structure while minifying JS files, you can use the following script:
module.exports = function(grunt){
grunt.loadNpmTasks('grunt-contrib-uglify');
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
uglify:{
t1:{
files: [{
cwd: 'src/',
src: '**/*.js',
dest: 'dest/',
expand: true,
flatten: false,
ext: '.min.js'
}]
}
}
});
};