Gulp开始但什么都不做

Question

我正在使用下划线和sass来创建主题，而我正在使用gulp作为任务运行。

问题是，在完成任务后没有任何反应。我试图执行一项任务，但再一次没有任何事情。为了确保我也执行了js任务javascript

这里是代码：

 var themename = 'mytheme';

    var gulp = require('gulp'),
        // Prepare and optimize code etc
        autoprefixer = require('autoprefixer'),
        browserSync = require('browser-sync').create(),
        image = require('gulp-image'),
        jshint = require('gulp-jshint'),
        postcss = require('gulp-postcss'),
        sass = require('gulp-sass'),
        sourcemaps = require('gulp-sourcemaps'),

        // Only work with new or updated files
        newer = require('gulp-newer'),

        // Name of working theme folder
        root = '../' + themename + '/',
        scss = root + 'sass/',
        js = root + 'js/',
        img = root + 'images/',
        languages = root + 'languages/';


    // CSS via Sass and Autoprefixer
    gulp.task('css', function() {
        return gulp.src(scss + '{style.scss,rtl.scss}')
        .pipe(sourcemaps.init())
        .pipe(sass({
            outputStyle: 'expanded', 
            indentType: 'tab',
            indentWidth: '1'
        }).on('error', sass.logError))
        .pipe(postcss([
            autoprefixer('last 2 versions', '> 1%')
        ]))
        .pipe(sourcemaps.write(scss + 'maps'))
        .pipe(gulp.dest(root));
    });

    // Optimize images through gulp-image
    gulp.task('images', function() {
        return gulp.src(img + 'RAW/**/*.{jpg,JPG,png}')
        .pipe(newer(img))
        .pipe(image())
        .pipe(gulp.dest(img));
    });

    // JavaScript
    gulp.task('javascript', function() {
        return gulp.src([js + '*.js'])
        .pipe(jshint())
        .pipe(jshint.reporter('default'))
        .pipe(gulp.dest(js));
    });


    // Watch everything
    gulp.task('watch', function() {
        browserSync.init({ 
            open: 'external',
            proxy: 'localhost/mysite',
            port: 8080
        });
        gulp.watch([root + '**/*.css', root + '**/*.scss' ], ['css']);
        gulp.watch(js + '**/*.js', ['javascript']);
        gulp.watch(img + 'RAW/**/*.{jpg,JPG,png}', ['images']);
        gulp.watch(root + '**/*').on('change', browserSync.reload);
    });


    // Default task (runs at initiation: gulp --verbose)
    gulp.task('default', ['watch']);