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