There are numerous occasions where JavaScript behaves strangely.

I love the frameworks written on top of javascript but do not prefer to write code in javascript.

Please find below cases where javascript behave differently:

Scenario 1

As shown below, see addition and subtraction.

11+1 //12

'11'+1 //111

11-1 //10

'11'-1 //10 //What is hell? right?

Scenario 2

JavaScript is very loosely concerning data types.

let name="Sukhpinder";setTimeout(function(){ name="Singh"});

console.log(name); //Sukhpinder

Scenario 3

I was overwhelmed with the event loop because JS does not merely execute code from top to bottom, waiting when interrupted.

function add(a,b){ return a+b;}

//One parameter missing it wont work add(3); //Nan

//One parameter extra don't care add(1,2,3); //3

Scenario 4

Not only data types, everything is designed very loosely coupled in JavaScript.

0.1+0.2 //0.30000000000000004

2.3*100 //229.99999999999997

Scenario 5

Imprecise operations in Javascript, the same problem can be seen in other programming languages like Python.

console.log(!![]) //true

console.log([]==true) //false

Scenario 6

It does not know what to say about below, which is entirely illogical.

Array.prototype.push("Hello");

let empty=[];

console.log(empty[0]); //Hello

console.log(empty.length); //0

Overall, JavaScript is more accessible to write because for several reasons. On the other hand, JavaScript makes you feel insecure, as described in different scenarios above.

Thank you for reading and I hope you liked the article..!! Please share your thoughts in the comment section.