0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 1 year has passed since last update.

【React】文字数を正確にカウントする

Last updated at Posted at 2023-10-16

ev.currentTarget.value.lengthのように文字数をカウントすると絵文字や「𩸽」などの文字を正確にカウントできません。

以下のように記述するとtextareaに入力された文字数を正確にカウントできます。


export default function TextArea() {
  return (
    <textarea
      onChange={(ev) => {
        const segmenterJa = new Intl.Segmenter('ja-JP', { granularity: 'grapheme' })
        const segments = segmenterJa.segment(ev.currentTarget.value)
        console.log(Array.from(segments).length)
      }}
    />
  )
}


0
0
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?