[JavaScript]Object.keys()

Object.keys()

const obj = {
  name: '田中 太郎',
  age: 30,
  area: 'Tokyo'
}

const result = Object.keys(obj);
 
console.log(result);

結果

["name", "age", "area"]

Object.keys(obj).forEach(function(data) {
 
  console.log(data);
 
})

結果

name
age
area