York Wang York Wang - 1 month ago 11
Node.js Question

sass variables not working in yeoman webapp

I scaffolded a webapp project using yeoman. After getting my sass folder structure setup I noticed that sass variables are not working. The following is my sass folder structure:

|-styles
|- sass
|-base
|-_base.scss
|-_colors.scss
|-_font.scss
|-_normalize.scss
|-_index.scss
|-layouts
|-modules
|-vendors
|- main.scss


I created an index.scss for each of the partial folder to @import all the partial files within.

@import 'normalize';
@import 'colors';
@import 'fonts';
@import 'base';


main.scss imports all the index.scss from each folder.

@import 'sass/base/index';


And when I try to use sass variable for a color value in the colors partial for example.

$main = '#B260C2';

h1 {
color: $main;
}


It just doesn't work. However, when I remove the sass variable and just write plain css, it works fine. I'm quite new to Yeoman and gulp, so I'm not too sure what i did wrong here. Below is the default gulp file setup that comes with the webapp generator.

// generated on 2016-10-30 using generator-webapp 2.2.0
const gulp = require('gulp');
const gulpLoadPlugins = require('gulp-load-plugins');
const browserSync = require('browser-sync');
const del = require('del');
const wiredep = require('wiredep').stream;
const runSequence = require('run-sequence');

const $ = gulpLoadPlugins();
const reload = browserSync.reload;

gulp.task('styles', () => {
return gulp.src('app/styles/*.scss')
.pipe($.plumber())
.pipe($.sourcemaps.init())
.pipe($.sass.sync({
outputStyle: 'expanded',
precision: 10,
includePaths: ['.']
}).on('error', $.sass.logError))
.pipe($.autoprefixer({browsers: ['> 1%', 'last 2 versions', 'Firefox ESR']}))
.pipe($.sourcemaps.write())
.pipe(gulp.dest('.tmp/styles'))
.pipe(reload({stream: true}));
});

gulp.task('scripts', () => {
return gulp.src('app/scripts/**/*.js')
.pipe($.plumber())
.pipe($.sourcemaps.init())
.pipe($.babel())
.pipe($.sourcemaps.write('.'))
.pipe(gulp.dest('.tmp/scripts'))
.pipe(reload({stream: true}));
});

function lint(files, options) {
return gulp.src(files)
.pipe(reload({stream: true, once: true}))
.pipe($.eslint(options))
.pipe($.eslint.format())
.pipe($.if(!browserSync.active, $.eslint.failAfterError()));
}

gulp.task('lint', () => {
return lint('app/scripts/**/*.js', {
fix: true
})
.pipe(gulp.dest('app/scripts'));
});
gulp.task('lint:test', () => {
return lint('test/spec/**/*.js', {
fix: true,
env: {
mocha: true
}
})
.pipe(gulp.dest('test/spec'));
});

gulp.task('html', ['styles', 'scripts'], () => {
return gulp.src('app/*.html')
.pipe($.useref({searchPath: ['.tmp', 'app', '.']}))
.pipe($.if('*.js', $.uglify()))
.pipe($.if('*.css', $.cssnano({safe: true, autoprefixer: false})))
.pipe($.if('*.html', $.htmlmin({collapseWhitespace: true})))
.pipe(gulp.dest('dist'));
});

gulp.task('images', () => {
return gulp.src('app/images/**/*')
.pipe($.cache($.imagemin()))
.pipe(gulp.dest('dist/images'));
});

gulp.task('fonts', () => {
return gulp.src(require('main-bower-files')('**/*.{eot,svg,ttf,woff,woff2}', function (err) {})
.concat('app/fonts/**/*'))
.pipe(gulp.dest('.tmp/fonts'))
.pipe(gulp.dest('dist/fonts'));
});

gulp.task('extras', () => {
return gulp.src([
'app/*',
'!app/*.html'
], {
dot: true
}).pipe(gulp.dest('dist'));
});

gulp.task('clean', del.bind(null, ['.tmp', 'dist']));

gulp.task('serve', () => {
runSequence(['clean', 'wiredep'], ['styles', 'scripts', 'fonts'], () => {
browserSync({
notify: false,
port: 9000,
server: {
baseDir: ['.tmp', 'app'],
routes: {
'/bower_components': 'bower_components'
}
}
});

gulp.watch([
'app/*.html',
'app/images/**/*',
'.tmp/fonts/**/*'
]).on('change', reload);

gulp.watch('app/styles/**/*.scss', ['styles']);
gulp.watch('app/scripts/**/*.js', ['scripts']);
gulp.watch('app/fonts/**/*', ['fonts']);
gulp.watch('bower.json', ['wiredep', 'fonts']);
});
});

gulp.task('serve:dist', () => {
browserSync({
notify: false,
port: 9000,
server: {
baseDir: ['dist']
}
});
});

gulp.task('serve:test', ['scripts'], () => {
browserSync({
notify: false,
port: 9000,
ui: false,
server: {
baseDir: 'test',
routes: {
'/scripts': '.tmp/scripts',
'/bower_components': 'bower_components'
}
}
});

gulp.watch('app/scripts/**/*.js', ['scripts']);
gulp.watch(['test/spec/**/*.js', 'test/index.html']).on('change', reload);
gulp.watch('test/spec/**/*.js', ['lint:test']);
});

// inject bower components
gulp.task('wiredep', () => {
gulp.src('app/styles/*.scss')
.pipe(wiredep({
ignorePath: /^(\.\.\/)+/
}))
.pipe(gulp.dest('app/styles'));

gulp.src('app/*.html')
.pipe(wiredep({
ignorePath: /^(\.\.\/)*\.\./
}))
.pipe(gulp.dest('app'));
});

gulp.task('build', ['lint', 'html', 'images', 'fonts', 'extras'], () => {
return gulp.src('dist/**/*').pipe($.size({title: 'build', gzip: true}));
});

gulp.task('default', () => {
runSequence(['clean', 'wiredep'], 'build');
});

Answer

You declare sass variable as such:

$var: value;

Not with the = sign as you pasted in your question.

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