CODEWITHSUNDEEP
javascriptunicode
julesbou
julesbou

Reputation: 5780

Comparing two letters returns false, but their unicode character is the same

(What kind of sorcery is this?)

I have two characters which looks the same, but when doing a comparison they are different:

console.log("i" === "i︆") // false

Then I compared their code which tell me it's the same, which is even stranger:

console.log("i".charCodeAt(0), "i︆".charCodeAt(0)) // 105 105

But finally I found the problem, the length of both characters is not the same:

console.log("i".length, "i︆".length) // 1 2

I'm wondering:

Upvotes: 1

Views: 322

Answers (2)

Nish
Nish

Reputation: 1012

The second character has an invisible character with code 65030 which belongs to "VARIATION SELECTOR" block of the Unicode standard. When I copied your example, I got the same but when you type it, it will give TRUE. Result with the copy paste:

console.log("i".charCodeAt(0),"i".charCodeAt(1),"i︆".charCodeAt(0),"i︆".charCodeAt(1),"i︆".charCodeAt(2))
105 NaN 105 65030 NaN

Upvotes: 1

Nathan
Nathan

Reputation: 499

The second one has an invisble character (65030) at position 1.

 console.log("i︆".charCodeAt(0), "i︆".charCodeAt(1))

Which means they're not 'strictly' equal.

Upvotes: 2

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