The history Object — JS Technical Interview Questions & Answers

Navigating the browser's session history.

The history Object

  • The history Object (js) is a JS topic. In plain words you use it for { name, marks } in a student record. Don’t start with a slogan — start with that picture.
  • Smallest example: const { name } = student. Type it, run it, and say what you see. If you can do that from memory, you know The history Object (js).
  • From the example next to this theory: Navigating the browser's session history.
  • Trap: copying nested objects by accident (shallow copy). Fix that before you talk about advanced JS.
  • Viva: what is The history Object (js)? Then show const { name } = student. Then name the trap.

Technical Interview Tip: What is The history Object (js)? Show this: const { name } = student. Trap: copying nested objects by accident (shallow copy).

Code Examples for The history Object

The history Object — working example

// Browser BOM sketch (not available in Node/Piston):
// console.log(window.innerWidth, navigator.userAgent);
// location.assign("/prep"); history.back();

// Runnable stand-in:
const windowLike = { innerWidth: 1280, location: { href: "/home" }, history: [] };
windowLike.history.push(windowLike.location.href);
windowLike.location.href = "/prep";
console.log(windowLike.innerWidth, windowLike.location.href, windowLike.history);

The history Object — bOM APIs (window, navigator, location, history) talk to the browser chrome around the DOM.

How to Explain The history Object to an Interviewer

What is The history Object (js)?

Used for { name, marks } a student record Not just the heading

Give one small example of The history Object (js).

const { name } = student Navigating the browser's session history

What mistake do beginners make with The history Object (js)?

copying nested objects by accident (shallow copy) Show the fix

Where do you use The history Object (js)?

a student record { name, marks }