C:\Users\Administrator>npm install -g gulp
.....
C:\Users\Administrator>gulp -v
[07:50:45] CLI version 3.9.1

dedao_vue_gulp
├─images
├─index.html
├─gulpfile.js
├─stylus
│  ├─common.styl

D:workspace>dedao_vue_gulp>npm init -y
...
D:workspace>dedao_vue_gulp>yarn add gulp
...
D:workspace>dedao_vue_gulp>yarn add gulp-stylus
...
D:workspace>dedao_vue_gulp>yarn add gulp-browser-sync
...

dedao_vue_gulp
├─index.html
├─gulpfile.js
├─images
├─node_modules
├─package.json
├─yarn.lock
├─stylus
│  ├─common.styl

var gulp = require('gulp');
var browserSync = require('browser-sync').create();
var reload = browserSync.reload;
var stylus = require('gulp-stylus');
var stylusPath = './stylus/*.styl';

gulp.task('stylus',function(){
    return gulp.src(stylusPath)
           .pipe(stylus())
           .pipe(gulp.dest('dist/css'))
           .pipe(browserSync.stream())
})

gulp.task('watch',function(){
    browserSync.init({
        server:{
            baseDir:'./'
        }
    });

    var temlateFiles = [
        '*.html'
    ];
    gulp.watch(temlateFiles).on('change',reload);
    gulp.watch(stylusPath,['stylus']);
})

[07:19:36] Using gulpfile D:\workspace\dedao_vue_gulp\gulpfile.js
[07:19:36] Starting 'watch'...
[07:19:36] Finished 'watch' after 166 ms
[Browsersync] Access URLs:
 --------------------------------------
       Local: http://localhost:3000
    External: http://192.168.1.101:3000
 --------------------------------------
          UI: http://localhost:3001
 UI External: http://192.168.1.101:3001
 --------------------------------------
[Browsersync] Serving files from: ./