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- /* eslint-disable yoda */
- 'use strict';
-
- const isFullwidthCodePoint = codePoint => {
- if (Number.isNaN(codePoint)) {
- return false;
- }
-
- // Code points are derived from:
- // http://www.unix.org/Public/UNIDATA/EastAsianWidth.txt
- if (
- codePoint >= 0x1100 && (
- codePoint <= 0x115F || // Hangul Jamo
- codePoint === 0x2329 || // LEFT-POINTING ANGLE BRACKET
- codePoint === 0x232A || // RIGHT-POINTING ANGLE BRACKET
- // CJK Radicals Supplement .. Enclosed CJK Letters and Months
- (0x2E80 <= codePoint && codePoint <= 0x3247 && codePoint !== 0x303F) ||
- // Enclosed CJK Letters and Months .. CJK Unified Ideographs Extension A
- (0x3250 <= codePoint && codePoint <= 0x4DBF) ||
- // CJK Unified Ideographs .. Yi Radicals
- (0x4E00 <= codePoint && codePoint <= 0xA4C6) ||
- // Hangul Jamo Extended-A
- (0xA960 <= codePoint && codePoint <= 0xA97C) ||
- // Hangul Syllables
- (0xAC00 <= codePoint && codePoint <= 0xD7A3) ||
- // CJK Compatibility Ideographs
- (0xF900 <= codePoint && codePoint <= 0xFAFF) ||
- // Vertical Forms
- (0xFE10 <= codePoint && codePoint <= 0xFE19) ||
- // CJK Compatibility Forms .. Small Form Variants
- (0xFE30 <= codePoint && codePoint <= 0xFE6B) ||
- // Halfwidth and Fullwidth Forms
- (0xFF01 <= codePoint && codePoint <= 0xFF60) ||
- (0xFFE0 <= codePoint && codePoint <= 0xFFE6) ||
- // Kana Supplement
- (0x1B000 <= codePoint && codePoint <= 0x1B001) ||
- // Enclosed Ideographic Supplement
- (0x1F200 <= codePoint && codePoint <= 0x1F251) ||
- // CJK Unified Ideographs Extension B .. Tertiary Ideographic Plane
- (0x20000 <= codePoint && codePoint <= 0x3FFFD)
- )
- ) {
- return true;
- }
-
- return false;
- };
-
- module.exports = isFullwidthCodePoint;
- module.exports.default = isFullwidthCodePoint;
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