Basic gulpfile for ts and less

gulpfile.js

let gulp = require('gulp');
let ts = require('gulp-typescript');
let less = require('gulp-less');
let path = require('path');
let watch = require('gulp-watch');

gulp.task('ts', function() {
    return gulp.src('src/**/*.ts')
        .pipe(ts({
            noImplicitAny: true
        }))
        .pipe(gulp.dest('dist'));
});

gulp.task('less', function() {
    return gulp.src('src/**/*.less')
        .pipe(less())
        .pipe(gulp.dest('dist'));
});

gulp.task('watch', function() {
    watch('src/**/*', function() {
        gulp.series('ts', 'less').call();
    });
});