The Yeelight WiFi Lib docs are located here.
Using npm:
$ npm i --save yeelight-wifi
In Node.js:
const YeelightSearch = require('yeelight-wifi');
const yeelightSearch = new YeelightSearch();
yeelightSearch.on('found', (lightBulb) => {
lightBulb.toggle()
.then(() => {
console.log('toggled');
})
.catch((err) => {
console.log(`received some error: ${err}`);
});
});