Careerpedia Front end Developer Interview Questions and Answers

The 'this' operator refers to the object that is currently executing the code.

• The value of 'this' depends on how a function is called.

• In a method, 'this' refers to the object that owns the method.

• In a regular function, 'this' refers to the global object (window in a browser).

• In an event handler, 'this' refers to the element that received the event.

• The value of 'this' can be explicitly set using call(), apply(), or bind

The == operator checks for equality, while the === operator checks for both equality and type.

• The == operator performs type coercion, meaning it converts the operands to a common type before comparison.

• The === operator does not perform type coercion and requires both the value and type to be the same for equality.

• For example, 1 == '1' returns true because the operands are coerced to the same type, but 1 === '1' returns

Navigation serves the purpose of helping users move around a website or application.

• Allows users to easily access different sections of the website

• Helps users understand the structure and hierarchy of the website

• Improves user experience by providing clear and concise directions

• Can include various types of navigation such as menus, breadcrumbs, and search bars

let is block-scoped while var is function-scoped.

• let variables are only accessible within the block they are declared in

• var variables are accessible within the entire function they are declared in

• let variables can be reassigned but not redeclared

• var variables can be both reassigned and redeclared

• let variables are a safer option for avoiding variable hoisting issues