es6 features in javascript interview questions

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sure! in this tutorial, we'll cover some of the key features introduced in es6 (ecmascript 2015) that are often discussed in javascript interviews. we will go through each feature, explain it, and provide code examples.

1. `let` and `const`
es6 introduced two new ways to declare variables: `let` and `const`.

`let` allows you to declare block-scoped variables.
`const` is used to declare block-scoped constants, which means you cannot reassign a `const` variable.



2. arrow functions
arrow functions provide a shorter syntax for writing functions. they also lexically bind the `this` value, which is useful in many cases.



3. template literals
template literals allow you to embed expressions inside string literals, using backticks (`` ` ``).



4. destructuring assignment
destructuring allows unpacking values from arrays or properties from objects into distinct variables.



5. default parameters
you can set default values for function parameters, which makes your functions more flexible.



6. spread and rest operators
the spread operator (`...`) allows an iterable (like an array) to be expanded in places where zero or more arguments or elements are expected. the rest operator collects multiple elements into an array.



7. classes
es6 introduced classes to javascript, which provide a clearer and more concise syntax for creating objects and handling inheritance.



8. modules
es6 introduced a module system, allowing you to export and import code between different files.

*in `module.js`:*


*in `main.js`:*


conclusion
these are some of the most important es6 features that you may encounter in javascript interviews. understanding these concepts will help you not only in interviews but also in writing cleaner and more efficient javascript code. make sure to practice using these features and be prepared to explain how they improve code readability and maintainability.

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