Add catch usage in promise.js

const newPromise = new Promise((resolve, reject)=>{
    setTimeout(()=>{
        if(Math.random() > 0.5){
            resolve('changed')
        }
        else{
            reject('error')
        }
    }, 3000)
}).then((data)=>{
    console.log(data) 
}).catch((error)=>{
    console.log(error)
})