JavaScript Implementation of Port Detector
bash
$ npm i detect-port --save
```js const detect = require('detect-port');
/* * callback usage /
detect(port, (err, _port) => { if (err) { console.log(err); }
if (port == _port) {
console.log(port: ${port} was not occupied);
} else {
console.log(port: ${port} was occupied, try port: ${_port});
}
});
/* * for a yield syntax instead of callback function implement /
const co = require('co');
co(function *() { const _port = yield detect(port);
if (port == _port) {
console.log(port: ${port} was not occupied);
} else {
console.log(port: ${port} was occupied, try port: ${_port});
}
});
/* * use as a promise /
detect(port)
.then(_port => {
if (port == _port) {
console.log(port: ${port} was not occupied);
} else {
console.log(port: ${port} was occupied, try port: ${_port});
}
})
.catch(err => {
console.log(err);
});
```
shell
$ npm i detect-port -g
```shell
$ detect
$ detect 80
$ detect --help ```