Answers for "javascript count object keys"

js countKeys

let count = Object.keys(myobj).length

js count keys in object

Object.keys(obj).length

js obj getting count of properties

let count = 0;
for (let k in myobj) if (myobj.hasOwnProperty(k)) count++;

check many keys in objects

const neededKeys = ['oldPassword', 'name', 'newPassword'];

const obj = {
    "name": "[email protected]",
    "oldPassword": "1234",
    "newPassword": "12345"
}

console.log(neededKeys.every(key => Object.keys(obj).includes(key)));