Javascript boolean tricky question, Either You can explain why? or welcome to the confusion club.

Question

I don't know if it defines as a tricky but I asked few guys and they all had no idea why it is happening. here is the basic noob code.

var name = "";
var status = "";
var m = "asd";

console.log(Boolean(name)); // or status, both are false coz both empty string
console.log(Boolean(m)); // this is true coz a filled string.

console.log((name == status) == m); // So the way js works, as JS being asynchronous. it should be like this. console.log((true) == m) according to grouping operator, first they will be checked, and then now it's (true == m) and if you check what is m in boolean, u can see it's true by Boolean(m) func. so it should be (true == true) which should return the true value. But it is returning false HOW?
(name == status); // returns true. coz both are false.
// avoiding === so it doesn't make it more confusing

ps: I found this while practising with booleans and didn't get an explanation yet.

Answer 1

"If one of the operands is Boolean, convert the Boolean operand to 1 if it is true and +0 if it is false."

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality

console.log((name == status) == m);
console.log((true) == m);
console.log((1) == m);
console.log((1) == "asd");// false

Answer 2

ODLNT u cleared my doubt thank you so much.
I just put var m = 1;
And it finally returned true, I now understand it clearly than ever. Thanks.

Answer 3

and btw console.log(true == true == true); // returns true, in case anybody say, comparing 3 values will return false always.

btw, I just realized that when you compare objects it will always return false, and I read that almost everything in JS is an Object. is this the reason???

Answer 4

Dror Krief i just tried name == name == m // returns false.
name == name // it's true, but then m is also true. Then why it's not true == true // A BIG true?

Answer 5

You're welcome, I'm glad I was able to help.

Answer 6

very interesting

true == m // is true

what if you do something like

name == name == m

?