..
https://www.facebook.com/groups/webfrontend/permalink/707007852777286/
황건구님께서 지난 9월에 프론트엔드개발그룹에 올려주신 글이었는데
실제 코드가 있지만 눈에는 보이지 않는 코드였습니다.
출저 : http://www.tntluoma.com/sidebars/codes/
HTMLSpecial Characters
| Code | Name | Displays As: |
|---|---|---|
| 	 | Horizontal tab | non-printing |
| | Line feed | non-printing |
| | Carriage Return | non-printing |
| " or " | quotation mark = APL quote | " or " |
| & or & | ampersand | & or & |
|   | Space | non-printing |
| ! | Exclamation mark | ! |
| " or " | Quotation mark | " or " |
| # | Number sign | # |
| $ | Dollar sign | $ |
| % | Percent sign | % |
| & or & | Ampersand | & or & |
| ' | Apostrophe | ' |
| ( | Left parenthesis | ( |
| ) | Right parenthesis | ) |
| * | Asterisk | * |
| + | Plus sign | + |
| , | Comma | , |
| - | Hyphen | - |
| . | Period (fullstop) | . |
| / | Solidus (slash) | / |
| : | Colon | : |
| ; | Semi-colon | ; |
| < or < | Less than | < or < |
| = | Equals sign | = |
| > or > | Greater than | > or > |
| ? | Question mark | ? |
| @ | Commercial at | @ |
| [ | Left square bracket | [ |
| \ | Reverse solidus (backslash) | \ |
| ] | Right square bracket | ] |
| ^ | Caret | ^ |
| _ | Horizontal bar (underscore) | _ |
| ` | Acute accent | ` |
| { | Left curly brace | { |
| | | Vertical bar | | |
| } | Right curly brace | } |
| ~ | Tilde | ~ |
| ’ is non-standard! use ’ instead! | ||
| &endash; or – are non-standard! use – instead! | ||
| &emdash; or — are non-standard! use — instead! | ||
|   or | no-break space = non-breaking space | or |
| ¡ or ¡ | inverted exclamation mark | ¡ or ¡ |
| ¢ or ¢ | Cent sign | ¢ or ¢ |
| £ or £ | Pound sterling | £ or £ |
| ¤ or ¤ | General currency sign | ¤ or ¤ |
| ¥ or ¥ | yen sign = yuan sign | ¥ or ¥ |
| ¦ or ¦ | pipe or broken bar = broken vertical bar | ¦ or ¦ |
| § or § | Section sign | § or § |
| ¨ or ¨ | diaeresis = spacing diaeresis | ¨ or ¨ |
| © or © | copyright sign | © or © |
| ª or ª | feminine ordinal indicator | ª or ª |
| « or « | left-pointing double angle quotation mark = left pointing guillemet | « or « |
| ¬ or ¬ | not sign | ¬ or ¬ |
| ­ or ­ | soft hyphen = discretionary hyphen | or |
| ® or ® | registered sign = registered trade mark sign | ® or ® |
| ¯ or ¯ | macron = spacing macron = overline = APL overbar | ¯ or ¯ |
| ° or ° | degree sign | ° or ° |
| ± or ± | plus-minus sign = plus-or-minus sign | ± or ± |
| ² or ² | superscript two = superscript digit two = squared | ² or ² |
| ³ or ³ | superscript three = superscript digit three = cubed | ³ or ³ |
| ´ or ´ | acute accent = spacing acute | ´ or ´ |
| µ or µ | micro sign | µ or µ |
| ¶ or ¶ | pilcrow sign = paragraph sign | ¶ or ¶ |
| · or · | middle dot = Georgian comma = Greek middle dot | · or · |
| ¸ or ¸ | cedilla = spacing cedilla | ¸ or ¸ |
| ¹ or ¹ | superscript one = superscript digit one | ¹ or ¹ |
| º or º | masculine ordinal indicator | º or º |
| » or » | right-pointing double angle quotation mark = right pointing guillemet | » or » |
| ¼ or ¼ | vulgar fraction one quarter = fraction one quarter | ¼ or ¼ |
| ½ or ½ | vulgar fraction one half = fraction one half | ½ or ½ |
| ¾ or ¾ | vulgar fraction three quarters = fraction three quarters | ¾ or ¾ |
| ¿ or ¿ | inverted question mark = turned question mark | ¿ or ¿ |
| À or À | latin capital letter A with grave = latin capital letter A grave | À or À |
| Á or Á | latin capital letter A with acute | Á or Á |
|  or  | latin capital letter A with circumflex |  or  |
| à or à | latin capital letter A with tilde | à or à |
| Ä or Ä | latin capital letter A with diaeresis | Ä or Ä |
| Å or Å | latin capital letter A with ring above = latin capital letter A ring | Å or Å |
| Æ or Æ | latin capital letter AE = latin capital ligature AE | Æ or Æ |
| Ç or Ç | latin capital letter C with cedilla | Ç or Ç |
| È or È | latin capital letter E with grave | È or È |
| É or É | latin capital letter E with acute | É or É |
| Ê or Ê | latin capital letter E with circumflex | Ê or Ê |
| Ë or Ë | latin capital letter E with diaeresis | Ë or Ë |
| Ì or Ì | latin capital letter I with grave | Ì or Ì |
| Í or Í | latin capital letter I with acute | Í or Í |
| Î or Î | latin capital letter I with circumflex | Î or Î |
| Ï or Ï | latin capital letter I with diaeresis | Ï or Ï |
| Ð or Ð | latin capital letter ETH | Ð or Ð |
| Ñ or Ñ | latin capital letter N with tilde | Ñ or Ñ |
| Ò or Ò | latin capital letter O with grave | Ò or Ò |
| Ó or Ó | latin capital letter O with acute | Ó or Ó |
| Ô or Ô | latin capital letter O with circumflex | Ô or Ô |
| Õ or Õ | latin capital letter O with tilde | Õ or Õ |
| Ö or Ö | latin capital letter O with diaeresis | Ö or Ö |
| × or × | multiplication sign | × or × |
| Ø or Ø | latin capital letter O with stroke = latin capital letter O slash | Ø or Ø |
| Ù or Ù | latin capital letter U with grave | Ù or Ù |
| Ú or Ú | latin capital letter U with acute | Ú or Ú |
| Û or Û | latin capital letter U with circumflex | Û or Û |
| Ü or Ü | latin capital letter U with diaeresis | Ü or Ü |
| Ý or Ý | latin capital letter Y with acute | Ý or Ý |
| Þ or Þ | latin capital letter THORN | Þ or Þ |
| ß or ß | Small sharp s, German (sz ligature) | ß or ß |
| ß or ß | latin small letter sharp s = ess-zed | ß or ß |
| à or à | latin small letter a with grave = latin small letter a grave | à or à |
| á or á | latin small letter a with acute | á or á |
| â or â | latin small letter a with circumflex | â or â |
| ã or ã | latin small letter a with tilde | ã or ã |
| ä or ä | latin small letter a with diaeresis | ä or ä |
| å or å | latin small letter a with ring above = latin small letter a ring | å or å |
| æ or æ | latin small letter ae = latin small ligature ae | æ or æ |
| ç or ç | latin small letter c with cedilla | ç or ç |
| è or è | latin small letter e with grave | è or è |
| é or é | latin small letter e with acute | é or é |
| ê or ê | latin small letter e with circumflex | ê or ê |
| ë or ë | latin small letter e with diaeresis | ë or ë |
| ì or ì | latin small letter i with grave | ì or ì |
| í or í | latin small letter i with acute | í or í |
| î or î | latin small letter i with circumflex | î or î |
| ï or ï | latin small letter i with diaeresis | ï or ï |
| ð or ð | latin small letter eth | ð or ð |
| ñ or ñ | latin small letter n with tilde | ñ or ñ |
| ò or ò | latin small letter o with grave | ò or ò |
| ó or ó | latin small letter o with acute | ó or ó |
| ô or ô | latin small letter o with circumflex | ô or ô |
| õ or õ | latin small letter o with tilde | õ or õ |
| ö or ö | latin small letter o with diaeresis | ö or ö |
| ÷ or ÷ | division sign | ÷ or ÷ |
| ø or ø | latin small letter o with stroke, = latin small letter o slash | ø or ø |
| ù or ù | latin small letter u with grave | ù or ù |
| ú or ú | latin small letter u with acute | ú or ú |
| û or û | latin small letter u with circumflex | û or û |
| ü or ü | latin small letter u with diaeresis | ü or ü |
| ý or ý | latin small letter y with acute | ý or ý |
| þ or þ | latin small letter thorn | þ or þ |
| ÿ or ÿ | Small y, dieresis or umlaut mark | ÿ or ÿ |
| Πor Π| latin capital ligature OE | Πor Π|
| œ or œ | latin small ligature oe | œ or œ |
| Š or Š | latin capital letter S with caron | Š or Š |
| š or š | latin small letter s with caron | š or š |
| Ÿ or Ÿ | latin capital letter Y with diaeresis | Ÿ or Ÿ |
| ƒ or ƒ | latin small f with hook = function = florin | ƒ or ƒ |
| ˆ or ˆ | modifier letter circumflex accent | ˆ or ˆ |
| ˜ or ˜ | small tilde | ˜ or ˜ |
| Α or Α | greek capital letter alpha | Α or Α |
| Β or Β | greek capital letter beta | Β or Β |
| Γ or Γ | greek capital letter gamma | Γ or Γ |
| Δ or Δ | greek capital letter delta | Δ or Δ |
| Ε or Ε | greek capital letter epsilon | Ε or Ε |
| Ζ or Ζ | greek capital letter zeta | Ζ or Ζ |
| Η or Η | greek capital letter eta | Η or Η |
| Θ or Θ | greek capital letter theta | Θ or Θ |
| Ι or Ι | greek capital letter iota | Ι or Ι |
| Κ or Κ | greek capital letter kappa | Κ or Κ |
| Λ or Λ | greek capital letter lambda | Λ or Λ |
| Μ or Μ | greek capital letter mu | Μ or Μ |
| Ν or Ν | greek capital letter nu | Ν or Ν |
| Ξ or Ξ | greek capital letter xi | Ξ |
| Ο or Ο | greek capital letter omicron | Ο or Ο |
| Π or Π | greek capital letter pi | Π or Π |
| Ρ or Ρ | greek capital letter rho | Ρ or Ρ |
| Σ or Σ | greek capital letter sigma | Σ or Σ |
| Τ or Τ | greek capital letter tau | Τ or Τ |
| Υ or Υ | greek capital letter upsilon | Υ or Υ |
| Φ or Φ | greek capital letter phi | Φ or Φ |
| Χ or Χ | greek capital letter chi | Χ or Χ |
| Ψ or Ψ | greek capital letter psi | Ψ or Ψ |
| Ω or Ω | greek capital letter omega | Ω or Ω |
| α or α | greek small letter alpha | α or α |
| β or β | greek small letter beta | β or β |
| γ or γ | greek small letter gamma | γ or γ |
| δ or δ | greek small letter delta | δ or δ |
| ε or ε | greek small letter epsilon | ε or ε |
| ζ or ζ | greek small letter zeta | ζ or ζ |
| η or η | greek small letter eta | η or η |
| θ or θ | greek small letter theta | θ or θ |
| ι or ι | greek small letter iota | ι or ι |
| κ or κ | greek small letter kappa | κ or κ |
| λ or λ | greek small letter lambda | λ or λ |
| μ or μ | greek small letter mu | μ or μ |
| ν or ν | greek small letter nu | ν or ν |
| ξ or ξ | greek small letter xi | ξ |
| ο or ο | greek small letter omicron | ο or ο |
| π or π | greek small letter pi | π or π |
| ρ or ρ | greek small letter rho | ρ or ρ |
| ς or ς | greek small letter final sigma | ς or ς |
| σ or σ | greek small letter sigma | σ or σ |
| τ or τ | greek small letter tau | τ or τ |
| υ or υ | greek small letter upsilon | υ or υ |
| φ or φ | greek small letter phi | φ or φ |
| χ or χ | greek small letter chi | χ or χ |
| ψ or ψ | greek small letter psi | ψ or ψ |
| ω or ω | greek small letter omega | ω or ω |
| ϑ or ϑ | greek small letter theta symbol | ϑ or ϑ |
| ϒ or ϒ | greek upsilon with hook symbol | ϒ or ϒ |
| ϖ or ϖ | greek pi symbol | ϖ or ϖ |
|   or   | en space | or |
|   or   | em space | or |
|   or   | thin space | or |
| ‌ or ‌ | zero width non-joiner | or |
| ‍ or ‍ | zero width joiner | or |
| ‎ or ‎ | left-to-right mark | or |
| ‏ or ‏ | right-to-left mark | or |
| – or – | en dash | – or – |
| — or — | em dash | — or — |
| ‘ or ‘ | left single quotation mark | ‘ or ‘ |
| ’ or ’ | right single quotation mark | ’ or ’ |
| ‚ or ‚ | single low-9 quotation mark | ‚ or ‚ |
| “ or “ | left double quotation mark | “ or “ |
| ” or ” | right double quotation mark | ” or ” |
| „ or „ | double low-9 quotation mark | „ or „ |
| † or † | dagger | † or † |
| ‡ or ‡ | double dagger | ‡ or ‡ |
| • or • | bullet = black small circle | • or • |
| … or … | horizontal ellipsis = three dot leader | … or … |
| ‰ or ‰ | per mille sign | ‰ or ‰ |
| ′ or ′ | prime = minutes = feet | ′ or ′ |
| ″ or ″ | double prime = seconds = inches | ″ or ″ |
| ‹ or ‹ | single left-pointing angle quotation mark | ‹ or ‹ |
| › or › | single right-pointing angle quotation mark | › or › |
| ‾ or ‾ | overline = spacing overscore | ‾ or ‾ |
| ⁄ or ⁄ | fraction slash | ⁄ or ⁄ |
| € or € | euro sign | € or € |
| ℑ or ℑ | blackletter capital I = imaginary part | ℑ or ℑ |
| ℘ or ℘ | script capital P = power set = Weierstrass p | ℘ or ℘ |
| ℜ or ℜ | blackletter capital R = real part symbol | ℜ or ℜ |
| ™ or ™ | trade mark sign | ™ or ™ |
| ℵ or ℵ | alef symbol = first transfinite cardinal | ℵ or ℵ |
| ← or ← | leftwards arrow | ← or ← |
| ↑ or ↑ | upwards arrow | ↑ or ↑ |
| → or → | rightwards arrow | → or → |
| ↓ or ↓ | downwards arrow | ↓ or ↓ |
| ↔ or ↔ | left right arrow | ↔ or ↔ |
| ↵ or ↵ | downwards arrow with corner leftwards = carriage return | ↵ or ↵ |
| ⇐ or ⇐ | leftwards double arrow | ⇐ or ⇐ |
| ⇑ or ⇑ | upwards double arrow | ⇑ or ⇑ |
| ⇒ or ⇒ | rightwards double arrow | ⇒ or ⇒ |
| ⇓ or ⇓ | downwards double arrow | ⇓ or ⇓ |
| ⇔ or ⇔ | left right double arrow | ⇔ or ⇔ |
| ∀ or ∀ | for all | ∀ or ∀ |
| ∂ or ∂ | partial differential | ∂ or ∂ |
| ∃ or ∃ | there exists | ∃ or ∃ |
| ∅ or ∅ | empty set = null set = diameter | ∅ or ∅ |
| ∇ or ∇ | nabla = backward difference | ∇ or ∇ |
| ∈ or ∈ | element of | ∈ or ∈ |
| ∉ or ∉ | not an element of | ∉ or ∉ |
| ∋ or ∋ | contains as member | ∋ or ∋ |
| ∏ or ∏ | n-ary product = product sign | ∏ or ∏ |
| ∑ or ∑ | n-ary sumation | ∑ or ∑ |
| − or − | minus sign | − or − |
| ∗ or ∗ | asterisk operator | ∗ or ∗ |
| √ or √ | square root = radical sign | √ or √ |
| ∝ or ∝ | proportional to | ∝ or ∝ |
| ∞ or ∞ | infinity | ∞ or ∞ |
| ∠ or ∠ | angle | ∠ or ∠ |
| ∧ or ∧ | logical and = wedge | ∧ or ∧ |
| ∨ or ∨ | logical or = vee | ∨ or ∨ |
| ∩ or ∩ | intersection = cap | ∩ or ∩ |
| ∪ or ∪ | union = cup | ∪ or ∪ |
| ∫ or ∫ | integral | ∫ or ∫ |
| ∴ or ∴ | therefore | ∴ or ∴ |
| ∼ or ∼ | tilde operator = varies with = similar to | ∼ or ∼ |
| ≅ or ≅ | approximately equal to | ≅ or ≅ |
| ≈ or ≈ | almost equal to = asymptotic to | ≈ or ≈ |
| ≠ or ≠ | not equal to | ≠ or ≠ |
| ≡ or ≡ | identical to | ≡ or ≡ |
| ≤ or ≤ | less-than or equal to | ≤ or ≤ |
| ≥ or ≥ | greater-than or equal to | ≥ or ≥ |
| ⊂ or ⊂ | subset of | ⊂ or ⊂ |
| ⊃ or ⊃ | superset of | ⊃ or ⊃ |
| ⊄ or ⊄ | not a subset of | ⊄ or ⊄ |
| ⊆ or ⊆ | subset of or equal to | ⊆ or ⊆ |
| ⊇ or ⊇ | superset of or equal to | ⊇ or ⊇ |
| ⊕ or ⊕ | circled plus = direct sum | ⊕ or ⊕ |
| ⊗ or ⊗ | circled times = vector product | ⊗ or ⊗ |
| ⊥ or ⊥ | up tack = orthogonal to = perpendicular | ⊥ or ⊥ |
| ⋅ or ⋅ | dot operator | ⋅ or ⋅ |
| ⌈ or ⌈ | left ceiling = apl upstile | ⌈ or ⌈ |
| ⌉ or ⌉ | right ceiling | ⌉ or ⌉ |
| ⌊ or ⌊ | left floor = apl downstile | ⌊ or ⌊ |
| ⌋ or ⌋ | right floor | ⌋ or ⌋ |
| 〈 or ⟨ | left-pointing angle bracket = bra | 〈 or 〈 |
| 〉 or ⟩ | right-pointing angle bracket = ket | 〉 or 〉 |
| ◊ or ◊ | lozenge | ◊ or ◊ |
| ♠ or ♠ | black spade suit | ♠ or ♠ |
| ♣ or ♣ | black club suit = shamrock | ♣ or ♣ |
| ♥ or ♥ | black heart suit = valentine | ♥ or ♥ |
| ♦ or ♦ | black diamond suit | ♦ or ♦ |
