npm - Gulp v4 watch task - Stack Overflow

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Thu Oct 21 2021 11:37:32 GMT+0000 (Coordinated Universal Time)

const autoprefixer = require('autoprefixer');
const babel = require('gulp-babel');
const cssdeclarationsorter = require('css-declaration-sorter');
const cssnano = require('cssnano');
const gulp = require('gulp');
const postcss = require('gulp-postcss');
const rename = require('gulp-rename');
const sass = require('gulp-sass');
const uglify = require('gulp-uglify');

const paths = {
    'styles': {
        'base': 'src/styles/',
        'src': 'src/styles/main.scss',
        'dest': 'dist/styles/',
        'watch': 'src/styles/**/*.scss',
    },
    'scripts': {
        'base': 'src/scripts/',
        'src': 'src/scripts/**/*.js',
        'dest': 'dist/scripts/',
        'watch': 'src/scripts/**/*.js',
    },
};

const styles = function () {
    const plugins = [
        autoprefixer(),
        cssdeclarationsorter(),
        cssnano(),
    ];

    return gulp.src(
        paths.styles.src,
        {
            'base': paths.styles.base,
        }
    ).
        pipe(sass().on(
            'error',
            sass.logError
        )).
        pipe(postcss(plugins)).
        pipe(rename({
            'basename': 'styles',
            'suffix': '.min',
        })).
        pipe(gulp.dest(paths.styles.dest));
};

const scripts = function () {
    return gulp.src(
        paths.scripts.src,
        {
            'base': paths.scripts.base,
        }
    ).
        pipe(babel()).
        pipe(uglify()).
        pipe(rename({
            'suffix': '.min',
        })).
        pipe(gulp.dest(paths.scripts.dest));
};

const watch = function () {
    gulp.watch(
        paths.scripts.watch,
        scripts
    );
    gulp.watch(
        paths.styles.watch,
        styles
    );
};

const build = gulp.parallel(
    styles,
    scripts,
    gulp.series(watch)
);

exports.default = build;

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https://stackoverflow.com/questions/52095228/gulp-v4-watch-task

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