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Diffstat (limited to 'node_modules/is-fullwidth-code-point/index.js')
-rw-r--r-- | node_modules/is-fullwidth-code-point/index.js | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/node_modules/is-fullwidth-code-point/index.js b/node_modules/is-fullwidth-code-point/index.js new file mode 100644 index 0000000..671f97f --- /dev/null +++ b/node_modules/is-fullwidth-code-point/index.js @@ -0,0 +1,50 @@ +/* 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; |