How to Create Sourcemaps with GruntJs Terser JS Minify - gruntjs

I'm using Terser for Gruntjs to minify js files.
I want to be able to create a sourcemap but I don't know how to translate the samples I see in the options section (https://www.npmjs.com/package/terser#source-map-options) into my gruntfile.js.
Here is the section where I am minifying and I added where I think the sourceMap options go:
grunt.initConfig({
terser: {
pages: {
options: {
mangle: {
properties: false
},
sourceMap: {
// source map options goes here I think but not certain what
}
},
files: [
{ expand: true,
src: '**/*.js',
dest: 'wwwroot/js',
cwd: 'wwwroot/js',
ext: '.min.js'
}
]
}
}
});
I cannot find a gruntjs example for this anywhere so any input or help would be great


I found the answer and have tested it. Note the sourceMap entry in the options below:
grunt.initConfig({
terser: {
pages: {
options: {
mangle: {
properties: false
},
sourceMap: true
},
files: [
{ expand: true,
src: '**/*.js',
dest: 'wwwroot/js',
cwd: 'wwwroot/js',
ext: '.min.js'
}
]
}
}
});

Related

How to use array variable properly in gruntfile.js

Trying to use a predefined array inside of a grunt file, thought using this.js_paths would work, but doesn't seem to work as I'm getting the error, "Cannot read property IndexOf of undefined" when it comes to trying to uglify the scripts. How can I link the js_paths variable to the files src property properly instead of copying the array into the files. Would like to define it separately at the top. Is this possible?
module.exports = function(grunt) {
// loadNpmTasks from package.json file for all devDependencies that start with grunt-
require("matchdep").filterDev("grunt-*", './package.json').forEach(grunt.loadNpmTasks);
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
js_paths: [
'inc/header1/js/*.js',
'!inc/header1/js/*.min.js',
'inc/header2/js/*.js',
'inc/header2/js/*.js',
'!inc/header2/js/*.min.js',
'js/*.js',
'!js/*.min.js'
],
uglify: {
options: {
mangle: true
},
build: {
files: [{
expand: true,
src: this.js_paths,
rename: function(dst, src) {
return src.replace('.js', '.min.js');
}
}]
}
},
watch: {
scripts: {
files: ['inc/header1/js/*.js', 'inc/header2/js/*.js', 'js/*.js'],
tasks: ['uglify'],
options: {
spawn: false,
}
}
}
});
grunt.registerTask('default', ['uglify', 'watch']);
};
Preferrably would like to use the same array js_paths in the watch files (since it's required there), if that makes sense? Still kinda new to using gruntfile.js

Utilize the Templates syntax. It's described in the docs as following:
Templates
Templates specified using <% %> delimiters will be automatically expanded when tasks read them from the config. Templates are expanded recursively until no more remain.
Essentially, change this.js_paths to '<%= js_paths %>' in your uglify task.
For instance:
// ...
uglify: {
options: {
mangle: true
},
build: {
files: [{
expand: true,
src: '<%= js_paths %>', // <-----
rename: function(dst, src) {
return src.replace('.js', '.min.js');
}
}]
}
},
// ...
Likewise for your watch task too.
For instance:
watch: {
scripts: {
files: '<%= js_paths %>', // <-----
tasks: ['uglify'],
options: {
spawn: false,
}
}
}

Could not find an option named "sourcemap" - Grunt watch

Grunt is running and detecting the change but the compilation is not happening due to the error "Could not find an option named "sourcemap"
Ruby was not installed since it was required before, I installed it.
Updated all the node packages inside the package.json file. SCSS/CSS files are in the correct path as fas as I know, not sure what could be the issue.
ui = {
'grunt' :
{
'js_files' :
[
'web/webroot/_ui/responsive/theme-blue/razer/js/jquery-ui-1.11.2.custom.min.js'
]
}
}
//'use strict';
module.exports = function (grunt) {
// Project configuration.
grunt.initConfig({
pkg: grunt.file.readJSON('package.json'),
//Compile Sass
sass: {
options: {
sourcemap: 'none'
},
compile: {
files: {
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.css': 'web/webroot/_ui/responsive/theme-blue/razer/sass/main.scss',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.home.css': 'web/webroot/_ui/responsive/theme-blue/razer/sass/main.home.scss',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.branding.css': 'web/webroot/_ui/responsive/theme-blue/razer/sass/main.branding.scss',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.whitepdp.css': 'web/webroot/_ui/responsive/theme-blue/razer/sass/main.whitepdp.scss'
}
}
},
//Minify css
cssmin: {
target: {
files: [
{
src: [
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.carousel.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.theme.default.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/simplebar.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/styles.css'
],
dest: 'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/mainmin.css'
},
{
src: [
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.home.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.carousel.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.theme.default.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/simplebar.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/styles.css'
],
dest: 'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/mainmin.home.css'
},
{
src: [
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.branding.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.carousel.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.theme.default.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/simplebar.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/styles.css'
],
dest: 'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/mainmin.branding.css'
},
{
src: [
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/main.whitepdp.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.carousel.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/owl.theme.default.min.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/simplebar.css',
'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/styles.css'
],
dest: 'web/webroot/_ui/responsive/theme-blue/razer/stylesheets/mainmin.whitepdp.css'
}
]
}
},
imagemin: { // Task
dynamic: { // Another target
files: [{
expand: true, // Enable dynamic expansion
cwd: 'web/webroot/_ui/responsive/theme-blue/razer/images/', // Src matches are relative to this path
src: ['**/*.{png,jpg,gif}'], // Actual patterns to match
dest: 'web/webroot/_ui/responsive/theme-blue/razer/images/' // Destination path prefix
}]
}
},
//Uglify js
uglify: {
build: {
files: [{
src: ui.grunt.js_files,
dest: 'web/webroot/_ui/responsive/theme-blue/razer/js/combined.js'
}],
files: [{
src: [
'web/webroot/_ui/responsive/common/js/jquery-2.1.1.min.js'
],
dest: 'web/webroot/_ui/responsive/theme-blue/razer/js/combined_lib.js'
}],
files: [{
src: [
'web/webroot/_ui/responsive/common/js/jquery-2.1.1.min.js'
],
dest: 'web/webroot/_ui/responsive/theme-blue/razer/js/combined_lib.js'
}]
},
debug: {
options: {
beautify: false,
mangle: false,
compress: true
},
files: [{
src: ui.grunt.js_files,
dest: 'web/webroot/_ui/responsive/theme-blue/razer/js/combined.js'
}]
}
},
watch: {
css: {
files: ['**/*.scss', '**/*.css'],
tasks: ['sass', 'cssmin']
},
build: {
files: ['web/webroot/_ui/responsive/theme-blue/razer/js/*.js', 'web/webroot/_ui/responsive/common/js/*.js', 'web/webroot/_ui/responsive/theme-blue/razer/js/plugin/*.js'], // which files to watch
tasks: ['uglify:build'],
options: {
nospawn: true
}
},
debug: {
files: ['web/webroot/_ui/responsive/theme-blue/razer/js/*.js', 'web/webroot/_ui/responsive/common/js/*.js'], // which files to watch
tasks: ['uglify:debug'],
options: {
nospawn: true
}
}
}
});
// Plugins
grunt.loadNpmTasks('grunt-contrib-watch');
grunt.loadNpmTasks('grunt-contrib-sass');
grunt.loadNpmTasks('grunt-contrib-cssmin');
grunt.loadNpmTasks('grunt-contrib-uglify');
//grunt.loadNpmTasks('grunt-contrib-imagemin');
grunt.registerTask('build', ['watch']);
grunt.registerTask('default', ['sass', 'cssmin', 'uglify']);
grunt.registerTask('debug', ['uglify:debug', 'watch:debug']);
grunt.registerTask('lib', ['uglify:lib']);
};

I am experiencing the same issue. I recently switched machines and upgraded to OS Catalina (not sure if this is related to the error).
A (temporary) solution that worked for me is to edit Gruntfile.js and remove the 'sourcemap' option:
before:
options: {
style: 'compressed',
sourcemap: true
},
after:
options: {
style: 'compressed'
},

most likely you have an old sass engine
just do gem install sass or sudo gem install sass

Invoking grunt concat two times with different options

I have different options to concat JS files and CSS files.
How can I configure grunt to run such a configuration ?
This doesn't work :
concat: {
js: { // Custom options for JS
options: {
separator: '\n',
sourceMap: true,
banner: '...',
},
core: {
src: ['src/core/*.js', 'src/core/**/*.js'],
dest: 'assets/xxxx.js'
}
},
css: { // Default options for CSS
core: {
src: ['src/core/*.css', 'src/core/**/*.css'],
dest: 'assets/xxxx.css'
}
}
}

This is ugly, but it works :
grunt.loadNpmTasks('grunt-contrib-concat');
grunt.renameTask('concat', 'concatCss');
grunt.loadNpmTasks('grunt-contrib-concat');
// The task is then loaded two times, under 'concat' and 'concatCss' names.
...
concat: {
options: {
separator: '\n',
sourceMap: true,
banner: '...',
},
core: {
src: ['src/core/*.js', 'src/core/**/*.js'],
dest: 'assets/xxxx.js'
},
concatCss: { // Default options for CSS
core: {
src: ['src/core/*.css', 'src/core/**/*.css'],
dest: 'assets/xxxx.css'
}
}

Grunt watch less on changed file only

I want to have a gruntfile with 2 tasks: less (compiles all less files) and watch (listens to changes and re-compiles the changed file).
I have the following Gruntfile.js:
module.exports = function(grunt) {
var files = [
{
expand: true,
cwd: 'media/less',
src: ['*.less'],
dest: 'media/css/',
ext: '.css'
},
{
expand: true,
cwd: 'media/less/vendor',
src: ['*.less'],
dest: 'media/css/vendor/',
ext: '.css'
},
{
expand: true,
cwd: 'media/admin/less',
src: ['*.less'],
dest: 'media/admin/css/',
ext: '.css'
}
];
grunt.initConfig({
less: {
development: {
options: {
compress: false,
yuicompress: true,
optimization: 2
},
files: files
},
production: {
options: {
compress: true,
yuicompress: true,
optimization: 2
},
files: files
}
},
watch: {
styles: {
files: ['media/**/*.less'],
tasks: ['less:development'],
options: {
nospawn: true
}
}
}
});
grunt.loadNpmTasks('grunt-contrib-less');
grunt.loadNpmTasks('grunt-contrib-watch');
grunt.registerTask('default', ['less:development']);
};
The less task runs correctly without any problems. The watch task however listens to changes, but re-compiles all files when one is changed. I suspect it's something to do with how I set up my less task, because I want my less file list to be dynamic and not to add each file manually.
As per this answer grunt should already support this, but I'm unsure how.

Ended up using the watch event and overriding the files property of the less task. Here's my final code:
module.exports = function(grunt) {
var files = [
{
expand: true,
cwd: 'media/less',
src: ['*.less'],
dest: 'media/css/',
ext: '.css',
extDot: 'last'
},
{
expand: true,
cwd: 'media/less/vendor',
src: ['*.less'],
dest: 'media/css/vendor/',
ext: '.css',
extDot: 'last'
},
{
expand: true,
cwd: 'media/admin/less',
src: ['*.less'],
dest: 'media/admin/css/',
ext: '.css',
extDot: 'last'
}
];
grunt.initConfig({
less: {
development: {
options: {
compress: false,
yuicompress: true,
optimization: 2
},
files: files
},
production: {
options: {
compress: true,
yuicompress: true,
optimization: 2
},
files: files
}
},
watch: {
styles: {
files: ['media/**/*.less'],
tasks: ['less:development'],
options: {
nospawn: true
}
}
}
});
grunt.event.on('watch', function(action, filepath){
// ignore include files, TODO: have naming convention
// if an include file has been changed, all files will be re-compiled
if(filepath.indexOf('.inc.') > -1)
return true;
// might not be the most efficient way to do this
var srcDir = filepath.split('/');
var filename = srcDir[srcDir.length - 1];
delete srcDir[srcDir.length - 1];
srcDir = srcDir.join('/');
var destDir = srcDir.replace(/less/g, 'css');
grunt.config('less.development.files', [{
src: filename,
dest: destDir,
expand: true,
cwd: srcDir,
ext: '.css',
extDot: 'last'
}]);
});
grunt.loadNpmTasks('grunt-contrib-less');
grunt.loadNpmTasks('grunt-contrib-watch');
grunt.registerTask('default', ['less:development']);
};

I'm unsure what you mean with the current title of your question Grunt watch less on changed file only. Do you mean that is a problem? That's the expected behavior of a watch task, it will watch the files specified for changes and run the tasks you specified - in this case the LESS compilation.
I did some changes to your file. Some of it was simplified, some was changed keeping flexibility and expandability of the script in mind.
First install underscore as a dependency, by running:
npm install underscore --save-dev
Then do the following changes to your Gruntfile.js:
module.exports = function(grunt) {
var _ = require('underscore');
var files = {
app : {
'<%= path.styles.css %>/styles.css' : '<%= path.styles.less %>/*.less'
},
vendor : {
'<%= path.styles.css %>/styles-vendor.css' : '<%= path.styles.vendor %>/*.less'
},
admin : {
'<%= path.styles.css %>/styles-admin.css' : '<%= path.styles.admin %>/*.less'
}
}
function all() {
'use strict';
var allfiles = {},
i = {};
for (i in files) {
_.extend(allfiles, files[i]);
}
return allfiles;
}
grunt.initConfig({
path : {
media : 'media',
styles : {
css: 'media/css',
less: 'media/less',
admin: 'media/admin/less',
vendor: '<%= path.styles.less %>/vendor'
}
},
less: {
development: {
options: {
compress: false,
yuicompress: true,
optimization: 2
},
files: (all())
},
production: {
options: {
compress: true,
yuicompress: true,
optimization: 2
},
files: (all())
}
},
watch: {
styles: {
files: ['<%= path.media %>/**/*.less'],
tasks: ['less:development'],
options: {
nospawn: true
}
}
}
});
grunt.loadNpmTasks('grunt-contrib-less');
grunt.loadNpmTasks('grunt-contrib-watch');
// run several tasks as default (handy for complex projects)
grunt.registerTask('dist', [ // run with 'grunt dist'
'less:production'
]);
grunt.registerTask('dev', [ // default, will run with 'grunt' only
'less:development'
]);
grunt.registerTask('default', 'dev');
};
If what you want is to actually compile the sets of files separately (files.app, files.vendor & files.admin), you might need to split the task some more, like so:
less: {
app: {
options: {
compress: false,
yuicompress: true,
optimization: 2
},
files: files.app
},
vendor: {
options: {
compress: true,
yuicompress: true,
optimization: 2
},
files: files.vendor
},
admin: {
options: {
compress: true,
yuicompress: true,
optimization: 2
},
files: files.admin
},
development: {
options: {
compress: false,
yuicompress: true,
optimization: 2
},
files: (all())
},
production: {
options: {
compress: true,
yuicompress: true,
optimization: 2
},
files: (all())
}
},
watch: {
all: {
files: ['<%= path.media %>/**/*.less'],
tasks: ['less:development'],
options: {
nospawn: true
}
},
app : {
files: ['<%= path.styles.less %>/*.less'],
tasks: ['less:app'],
options: {
nospawn: true
}
},
vendor : {
files: ['<%= path.styles.vendor %>/*.less'],
tasks: ['less:vendor'],
options: {
nospawn: true
}
},
admin : {
files: ['<%= path.styles.admin %>/*.less'],
tasks: ['less:admin'],
options: {
nospawn: true
}
}
}
Then you could then run either of these:
grunt watch:app
grunt watch:vendor
grunt watch:admin
You can always to choose to run the tasks directly, once:
grunt less:app
grunt less:vendor
grunt less:admin
Hope this helps! Please note that I haven't tested this.

How to compile 2 separate LESS files with grunt-recess

I want to compile 2 separate files with grunt recess:
recess: {
dist: {
options: {
compile: true
},
files: {
'path/css/custom.css': ['path/less/custom.less'],
'path/css/animate.css': ['path/less/antimate.less'],
},
},
},
Only the first file is compiling before grunt exits. Where am I going wrong?

You should try this
recess: {
dist: {
options: {
compile: true
},
files: [
{src: ['path/less/custom.less'], dest: 'path/css/custom.css'},
{src: ['path/less/antimate.less'], dest: 'path/css/animate.css'}
],
}
},
Or you can enable dynamic expansion to compile every .less in your folder:
recess: {
dist: {
options: {
compile: true
},
files: [
{
expand: true, // Enable dynamic expansion.
cwd: 'path/to/less', // Src matches are relative to this path.
src: ['*.less'], // Actual pattern(s) to match.
dest: 'path/to/css/', // Destination path prefix.
ext: '.css', // Dest filepaths will have this extension.
},
],
},
},
See http://gruntjs.com/configuring-tasks for more reference.

like this:
recess: {
dist: {
options: {
compile: true
},
files: {
'dist/combined.css': [
'src/main.css',
'src/component.css'
]
}
}
}

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