Check if the character represented by a given Unicode code point is fullwidth
$ npm install is-fullwidth-code-point
const isFullwidthCodePoint = require('is-fullwidth-code-point');
isFullwidthCodePoint('谢'.codePointAt(0));
//=> true
isFullwidthCodePoint('a'.codePointAt(0));
//=> false
Type: number
The code point of a character.
MIT © Sindre Sorhus