获取javascript对象中的最后一项

const obj = { a: 1, b: 2, c: 3 };
const keys = Object.keys(obj);
const lastKey = keys[keys.length - 1];
const lastValue = obj[lastKey];
console.log(lastValue);

const obj = { a: 1, b: 2, c: 3 };
const entries = Object.entries(obj);
const lastEntry = entries[entries.length - 1];
const lastValue = lastEntry[1];
console.log(lastValue);

const obj = { a: 1, b: 2, c: 3 };
let lastValue;
for (const key in obj) {
  lastValue = obj[key];
}
console.log(lastValue);