CODEWITHSUNDEEP
javascriptunicodechinese-locale
vdegenne
vdegenne

Reputation: 13290

What is proper way to test if the input is Korean or Chinese using JavaScript?

My application was relying on this function to test if a string is Korean or not :

const isKoreanWord = (input) => {
  const match = input.match(/[\u3131-\uD79D]/g);
  return match ? match.length === input.length : false;
}

isKoreanWord('만두'); // true
isKoreanWord('mandu'); // false

until I started to include Chinese support and now this function is incoherent :

isKoreanWord('幹嘛'); // true

I believe this is caused by the fact that Korean characters and Chinese ones are intermingled into the same Unicode range.

How should I correct this function to make it returns true if the input contains only Korean characters ?

Upvotes: 7

Views: 5097

Answers (3)

brc-dd
brc-dd

Reputation: 13014

In modern browsers, you can use unicode character classes directly:

const RE = /\p{sc=Hangul}/u

console.log(RE.test('만두')) // true
console.log(RE.test('mandu')) // false
console.log(RE.test('幹嘛')) // false

Upvotes: 1

mesqueeb
mesqueeb

Reputation: 6324

a shorter version that matches korean characters

const regexKorean = /[\u1100-\u11FF\u3130-\u318F\uA960-\uA97F\uAC00-\uD7AF\uD7B0-\uD7FF]/g

Upvotes: 2

Magnum
Magnum

Reputation: 2395

Here is the unicode range you need for Hangul (Taken from their wikipedia page). 

U+AC00–U+D7AF
U+1100–U+11FF
U+3130–U+318F
U+A960–U+A97F
U+D7B0–U+D7FF

So your regex .match should look like this:

const match = input.match(/[\uac00-\ud7af]|[\u1100-\u11ff]|[\u3130-\u318f]|[\ua960-\ua97f]|[\ud7b0-\ud7ff]/g);

Upvotes: 16

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