BrowserSync + Gulp.js: Simple webServer + liveReload + watching CSS, HTML and SASS files

gulpfile.js

/**
 * This example:
 *  Uses the built-in BrowserSync server for HTML files
 *  Watches & compiles SASS files
 *  Watches & injects CSS files
 * 
 * More details: http://www.browsersync.io/docs/gulp/
 * 
 * Install:
 * npm install browser-sync gulp gulp-sass --save-dev
 * 
 * Then run it with:
 * gulp
 */
var browserSync = require('browser-sync');
var reload      = browserSync.reload;
var gulp        = require('gulp');
var sass        = require('gulp-sass');

// Browser-sync task, only cares about compiled CSS
gulp.task('browser-sync', function() {
    browserSync({
        server: {
            baseDir: "./"
        }
    });
});


// Sass task, will run when any SCSS files change & BrowserSync
// will auto-update browsers
gulp.task('sass', function () {
    return gulp.src('scss/**/*.scss')
        .pipe(sass())
        .pipe(gulp.dest('css'))
        .pipe(reload({stream:true}));
});

// Reload all Browsers
gulp.task('bs-reload', function () {
    browserSync.reload();
});

// Default task to be run with `gulp`
// This default task will run BrowserSync & then use Gulp to watch files.
// When a file is changed, an event is emitted to BrowserSync with the filepath.
gulp.task('default', ['browser-sync'], function () {
    gulp.watch('css/*.css', function (file) {
        if (file.type === "changed") {
            reload(file.path);
        }
    });
    gulp.watch("*.html", ['bs-reload']);
});

Hi jbutko,

Is there a way to reload whenever a scss file changes?

Now "gulp" is watching for css and html changes, but I have to write "gulp sass" in order to css been compiled. So "gulp" realizes, and the browser reloads itself.

I've tried some other solutions I've seen on the net, and also I've modified your gulpfile.
My better result worked fine, until the third change on the same scss file, that throws an error message:

events.js:112
throw er; // Unhandled 'error' event
^
Error: src\scss\components_index.scss
Error: File to import not found or unreadable: navbar.

Thanks,

you should use arrow functions and const

this should be updated for gulp 4

gulp.task('default', gulp.series('browser-sync', function() {
gulp.watch('css/.css', function (file) {
if (file.type === "changed") {
reload(file.path);
}
});
gulp.watch(".html", ['bs-reload']);
}));