Question 1

What is The "this" Keyword?

Accepted Answer

The `this` keyword refers to the object that is executing the current function. Its value is determined by HOW a function is called, not where it's defined. There are 4 main rules that determine what `this` refers to.

Question 2

What are the key points about The "this" Keyword?

Accepted Answer

this is determined at call time, not definition time. Rule 1: new binding - this = new instance. Rule 2: Explicit binding (call/apply/bind) - this = specified object. Rule 3: Implicit binding (obj.method()) - this = object left of dot. Rule 4: Default binding - this = window (or undefined in strict mode). Arrow functions inherit this from enclosing scope

Question 3

What are common mistakes with The "this" Keyword?

Accepted Answer

Losing this when passing methods as callbacks. Using arrow functions as object methods. Forgetting that this in nested functions is different

Question 4

What are interview tips for The "this" Keyword?

Accepted Answer

Know all 4 binding rules in order of precedence. Explain why arrow functions are useful in callbacks. Be able to fix "this" issues with bind or arrow functions

JavaScript this Keyword — How this Works in Every Context

Key Concepts

Topics Covered

Practice Problems

Common Mistakes to Avoid

Interview Tips