Interview trick question JavaScript | Beginners | NodeJS | frontend | backend | global | window

In this video we try to understand one of the trick question that is usually asked by interviewers to check if we are paying attention to the code or not.
#Shorts

JavaScript | Window Object | Global Object | Nodejs

[AshutoshShelkeP]

The variable b is not explicitly declared with let, const, or var inside the fun function. Therefore, b becomes implicitly global.

[rishabhkaushik]

As a senior js dev sometimes i think wtf is wrong with javascript

[ldsmike]

But why is it declared globally? Documentation?

[mohitpardhi]

const fun = () =>{
let a = b = 1
a++
return a
}
console.log(typeof a)
console.log(typeof b)
VM124:6 undefined
VM124:7 undefined

[donaa]

Because of this I lost my dream company 😢