gulpfile.js

const fs = require("fs");
const path = require("path");
const gulp = require("gulp");
const glob = require('glob');
const source = require('vinyl-source-stream');
const rename = require('gulp-rename');
const es = require('event-stream')
const shell = require("gulp-shell");
const replace = require('gulp-replace');
const merge = require('merge-stream');
const browserify = require('browserify');
const tsify = require('tsify');
const watchify = require('watchify');
const exorcist = require('exorcist')
const ts = require('gulp-typescript');
const sass = require('gulp-sass')(require('sass'));
let minify = true;
let watch = false;
let bfi = null;
const destination = "./dist";
const mapfile = path.join(__dirname, destination, 'bundle.js.map')


gulp.task("copyfiles1", function () {
    console.log("copyfiles1")
    const f1 = gulp.src('src/**/*.html').pipe(gulp.dest(destination));
    const f2 = gulp.src('src/**/*.png').pipe(gulp.dest(destination));
    const f3 = gulp.src('src/manifest.json').pipe(gulp.dest(destination));

    const copyspurce = gulp.src('src/**/*.ts').pipe(gulp.dest(destination));
    return merge(f1, f2, f3, copyspurce);
});
gulp.task("setwatch", async function () {
    minify = false;
    watch = true;
});
gulp.task("dowatch", function () {
    console.log("watch")
    return gulp.watch([].concat('src/**/*.ts').concat('src/**/*.html').concat('src/**/*.png').concat('src/manifest.json'), gulp.series("browserify", "copyfiles1"));
});

gulp.task('browserify', function (done) {
    glob('./src/**/*.ts', function (err, files) {
        if (err) done(err);
        var tasks = files.map(function (entry) {
            return browserify({ entries: [entry], basedir: '.', debug: true })
                .plugin(tsify, { noImplicitAny: false })
                .bundle()
                .pipe(source(entry))
                .pipe(rename({
                    extname: '.js', dirname: ""
                }))
                .pipe(gulp.dest(destination));
        });
        es.merge(tasks).on('end', done);
    })
    // .pipe(rename(function (path) {
    //     console.log(path);
    //     return path;
    // }))

});

gulp.task("default", gulp.series("setwatch", "browserify", "copyfiles1", "dowatch"));