SOURCE

const node = {
  loc: {
    start: {
      line: 1,
      column: 5
    }
  }
};
let { loc, loc: { start }, loc: { start: { line }} } = node;
const format =(obj)=>{
    return JSON.stringify(obj)
}
console.log(format(loc))
console.log(format(line))
console.log(format(start))