How to do reload in express Node.js using Gulp?

Question

Node.js

var express = require("express");
var app = express();
app.get("/", function(request, response){
    response.send("<h2>Привет Express!</h2>");
});
app.listen(3000);

Let's say I'm running the server on express on port 3000
How do I properly configure gulp so that it listens for changes in pug, scss? After all, it also runs on some port.

Answer 1

Example, change for yourself.

...
const exec = require('child_process').exec;
...
const paths = {
    allSrcJs: 'src/**/*.js',
    libDir: 'lib',
};
gulp.task('main', gulp.series('build', (callback) => {
    exec(`node ${paths.libDir}`, (error, stdout) => {
        console.log(stdout);
        return callback(error);
    });
}));

gulp.task('watch', () => {
    gulp.watch(paths.allSrcJs, ['main']);
});