Why is == different than === here?

Question

Why does javascript treat "xy" == new String("xy") as true, but "xy" === new String("xy") as false?.

I have read https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Expressions_and_Operators, but am still confused

Check `typeof "xy"` and `typeof new String("xy")` and `===` also compares the type. — Tushar, Aug 23 '16 at 15:18
=== also compares the *types*, and they ain't the same, innit. — Bathsheba, Aug 23 '16 at 15:19
Please do not ask duplicate questions http://stackoverflow.com/questions/359494/which-equals-operator-vs-should-be-used-in-javascript-comparisons — Muntasir Alam, Aug 23 '16 at 15:20

score 4 · Answer 1 · edited Aug 23 '16 at 16:01

4

typeof "xy"

is "string"

typeof new String("xy")

is "object"

=== compares both value and type

== converts the types and then compares just the values

edited Aug 23 '16 at 16:01

Will

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answered Aug 23 '16 at 15:22

DigitalShotts

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Okay. Then how this answers the question. – Tushar Aug 23 '16 at 15:23
@Tushar sorry have ammended – DigitalShotts Aug 23 '16 at 15:25
1

_=== compares both value and type_ Can you please explain why `==` returns `true`? – Tushar Aug 23 '16 at 15:25

score 0 · Answer 2 · answered Aug 23 '16 at 15:26

0

the == operator just compares the values, === compares values and types. So type of "xy" is string and type of new String() is object. That's why you see the difference between those two comparisons

answered Aug 23 '16 at 15:26

Instance Noodle

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Why is == different than === here?

2 Answers2