我知道我迟到了，但你也可以用普通的CSS来完成这个:

HTML:

(它可以是任何HTML元素，如果你正在使用一个内联元素，例如<span>，确保你使它成为一个block/内联块元素display:block;或显示:inline-block):

<div class=“up”></div>

and

<div class=“down”></div>

CSS:

.up {
   height:0;
   width:0;
   border-top:100px solid black;
   border-left:100px solid transparent;
   transform:rotate(-45deg);   
  }

.down {
   height:0;
   width:0;
   border-bottom:100px solid black;
   border-right:100px solid transparent;
   transform:rotate(-45deg); 
  }

您还可以使用:before和:after伪元素来完成它，这实际上是一种更好的方法，因为您可以避免创建额外的标记。但这取决于你想如何完成它。

--

这是CodePen中的一个演示，有许多箭头的可能性。

选项1:unicode列排序箭头

I found this one very handy for a single character column sorter.

(放大后看起来不错)

&#x21D5; = ⇕

注意事项(使用Unicode符号时) Unicode支持因所选择的符号、浏览器和 字体族。如果你发现你选择的符号不工作在某些 浏览器然后尝试使用不同的字体族。微软建议 “Segoe UI符号”然而，这将是明智的包括字体 你的网站，因为没有多少人在他们的电脑上。

在其他浏览器中打开此页，查看哪些符号使用默认字体呈现。

---

更多的unicode箭头。

使用它们:

把它们从纸上抄下来。 使用每行上面的代码，在与该行位置相关的分号前面插入相应的十六进制数。

最后一位数字

 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F

---

& # x219;

←↑→↓↔↖↘↘←↚↛↜↝↞↟

___

&#x21A;

↡↢↣↤↥↦↧↨系↪↫↬↭↮↯

___

&#x21B;

↰↱↲↳↴(↶↷↸↺↻↼↽↾↿

___

& # x21C;

⇀⇁⇂⇃⇄⇅⇆⇇⇈⇉⇊⇋⇌⇍⇎⇏

___

& # x21D;

⇐弟弟弟弟弟弟

___

&#x21E;

⇠⇡⇢⇣⇤⇥⇦⇨⇪⇫⇬⇭⇮⇯

___

&#x21F;

⇰⇳⇴⇵⇶⇷⇸⇹⇺⇻⇼⇽⇾⇿

___

其他HTML unicode符号

其他有用的Unicode图标/符号的选定列表。

U+2302  ⌂   HOUSE
U+2303  ⌃   UP ARROWHEAD
U+2304  ⌄   DOWN ARROWHEAD
U+2305  ⌅   PROJECTIVE
U+2306  ⌆   PERSPECTIVE
U+2307  ⌇   WAVY LINE
U+2315  ⌕   TELEPHONE RECORDER
U+2316  ⌖   POSITION INDICATOR
U+2317  ⌗   VIEWDATA SQUARE
U+2318  ⌘   PLACE OF INTEREST SIGN
U+231A  ⌚   WATCH
U+231B  ⌛   HOURGLASS
U+2326  ⌦   ERASE TO THE RIGHT
U+2327  ⌧   X IN A RECTANGLE BOX
U+2328  ⌨   KEYBOARD
U+2329  〈   LEFT-POINTING ANGLE BRACKET
U+232A  〉   RIGHT-POINTING ANGLE BRACKET
U+232B  ⌫   ERASE TO THE LEFT
U+23E9  ⏩   BLACK RIGHT-POINTING DOUBLE TRIANGLE
U+23EA  ⏪   BLACK LEFT-POINTING DOUBLE TRIANGLE
U+23EB  ⏫   BLACK UP-POINTING DOUBLE TRIANGLE
U+23EC  ⏬   BLACK DOWN-POINTING DOUBLE TRIANGLE
U+23ED  ⏭   BLACK RIGHT-POINTING DOUBLE TRIANGLE WITH VERTICAL BAR
U+23EE  ⏮   BLACK LEFT-POINTING DOUBLE TRIANGLE WITH VERTICAL BAR
U+23EF  ⏯   BLACK RIGHT-POINTING TRIANGLE WITH DOUBLE VERTICAL BAR
U+23F0  ⏰   ALARM CLOCK
U+23F1  ⏱   STOPWATCH
U+23F2  ⏲   TIMER CLOCK
U+23F3  ⏳   HOURGLASS WITH FLOWING SAND
U+2600  ☀   BLACK SUN WITH RAYS
U+2601  ☁   CLOUD
U+2602  ☂   UMBRELLA
U+2603  ☃   SNOWMAN
U+2604  ☄   COMET
U+2605  ★   BLACK STAR
U+2606  ☆   WHITE STAR
U+2607  ☇   LIGHTNING
U+2608  ☈   THUNDERSTORM
U+2609  ☉   SUN
U+260A  ☊   ASCENDING NODE
U+260B  ☋   DESCENDING NODE
U+260C  ☌   CONJUNCTION
U+260D  ☍   OPPOSITION
U+260E  ☎   BLACK TELEPHONE
U+260F  ☏   WHITE TELEPHONE
U+2610  ☐   BALLOT BOX
U+2611  ☑   BALLOT BOX WITH CHECK
U+2612  ☒   BALLOT BOX WITH X
U+2613  ☓   SALTIRE
U+2614  ☔   UMBRELLA WITH RAINDROPS
U+2615  ☕   HOT BEVERAGE
U+2616  ☖   WHITE SHOGI PIECE
U+2617  ☗   BLACK SHOGI PIECE
U+2618  ☘   SHAMROCK
U+2619  ☙   REVERSED ROTATED FLORAL HEART BULLET
U+261A  ☚   BLACK LEFT-POINTING INDEX
U+261B  ☛   BLACK RIGHT-POINTING INDEX
U+261C  ☜   WHITE LEFT POINTING INDEX
U+261D  ☝   WHITE UP POINTING INDEX
U+261E  ☞   WHITE RIGHT POINTING INDEX
U+261F  ☟   WHITE DOWN POINTING INDEX
U+2620  ☠   SKULL AND CROSSBONES
U+2621  ☡   CAUTION SIGN
U+2622  ☢   RADIOACTIVE SIGN
U+2623  ☣   BIOHAZARD SIGN
U+262A  ☪   STAR AND CRESCENT
U+262B  ☫   FARSI SYMBOL
U+262C  ☬   ADI SHAKTI
U+262D  ☭   HAMMER AND SICKLE
U+262E  ☮   PEACE SYMBOL
U+262F  ☯   YIN YANG
U+2638  ☸   WHEEL OF DHARMA
U+2639  ☹   WHITE FROWNING FACE
U+263A  ☺   WHITE SMILING FACE
U+263B  ☻   BLACK SMILING FACE
U+263C  ☼   WHITE SUN WITH RAYS
U+263D  ☽   FIRST QUARTER MOON
U+263E  ☾   LAST QUARTER MOON
U+263F  ☿   MERCURY
U+2640  ♀   FEMALE SIGN
U+2641  ♁   EARTH
U+2642  ♂   MALE SIGN
U+2643  ♃   JUPITER
U+2644  ♄   SATURN
U+2645  ♅   URANUS
U+2646  ♆   NEPTUNE
U+2647  ♇   PLUTO
U+2648  ♈   ARIES
U+2649  ♉   TAURUS
U+264A  ♊   GEMINI
U+264B  ♋   CANCER
U+264C  ♌   LEO
U+264D  ♍   VIRGO
U+264E  ♎   LIBRA
U+264F  ♏   SCORPIUS
U+2650  ♐   SAGITTARIUS
U+2651  ♑   CAPRICORN
U+2652  ♒   AQUARIUS
U+2653  ♓   PISCES
U+2654  ♔   WHITE CHESS KING
U+2655  ♕   WHITE CHESS QUEEN
U+2656  ♖   WHITE CHESS ROOK
U+2657  ♗   WHITE CHESS BISHOP
U+2658  ♘   WHITE CHESS KNIGHT
U+2659  ♙   WHITE CHESS PAWN
U+265A  ♚   BLACK CHESS KING
U+265B  ♛   BLACK CHESS QUEEN
U+265C  ♜   BLACK CHESS ROOK
U+265D  ♝   BLACK CHESS BISHOP
U+265E  ♞   BLACK CHESS KNIGHT
U+265F  ♟   BLACK CHESS PAWN
U+2660  ♠   BLACK SPADE SUIT
U+2661  ♡   WHITE HEART SUIT
U+2662  ♢   WHITE DIAMOND SUIT
U+2663  ♣   BLACK CLUB SUITE
U+2664  ♤   WHITE SPADE SUIT
U+2665  ♥   BLACK HEART SUIT
U+2666  ♦   BLACK DIAMOND SUIT
U+2667  ♧   WHITE CLUB SUITE
U+2668  ♨   HOT SPRINGS
U+2669  ♩   QUARTER NOTE
U+266A  ♪   EIGHTH NOTE
U+266B  ♫   BEAMED EIGHTH NOTES
U+266C  ♬   BEAMED SIXTEENTH NOTES
U+266D  ♭   MUSIC FLAT SIGN
U+266E  ♮   MUSIC NATURAL SIGN
U+266F  ♯   MUSIC SHARP SIGN
U+267A  ♺   RECYCLING SYMBOL FOR GENERIC MATERIALS
U+267B  ♻   BLACK UNIVERSAL RECYCLING SYMBOL
U+267C  ♼   RECYCLED PAPER SYMBOL
U+267D  ♽   PARTIALLY-RECYCLED PAPER SYMBOL
U+267E  ♾   PERMANENT PAPER SIGN
U+267F  ♿   WHEELCHAIR SYMBOL
U+2680  ⚀   DIE FACE-1
U+2681  ⚁   DIE FACE-2
U+2682  ⚂   DIE FACE-3
U+2683  ⚃   DIE FACE-4
U+2684  ⚄   DIE FACE-5
U+2685  ⚅   DIE FACE-6
U+2686  ⚆   WHITE CIRCLE WITH DOT RIGHT
U+2687  ⚇   WHITE CIRCLE WITH TWO DOTS
U+2688  ⚈   BLACK CIRCLE WITH WHITE DOT RIGHT
U+2689  ⚉   BLACK CIRCLE WITH TWO WHITE DOTS
U+268A  ⚊   MONOGRAM FOR YANG
U+268B  ⚋   MONOGRAM FOR YIN
U+268C  ⚌   DIGRAM FOR GREATER YANG
U+268D  ⚍   DIGRAM FOR LESSER YIN
U+268E  ⚎   DIGRAM FOR LESSER YANG
U+268F  ⚏   DIGRAM FOR GREATER YIN
U+2690  ⚐   WHITE FLAG
U+2691  ⚑   BLACK FLAG
U+2692  ⚒   HAMMER AND PICK
U+2693  ⚓   ANCHOR
U+2694  ⚔   CROSSED SWORDS
U+2695  ⚕   STAFF OF AESCULAPIUS
U+2696  ⚖   SCALES
U+2697  ⚗   ALEMBIC
U+2698  ⚘   FLOWER
U+2699  ⚙   GEAR
U+269A  ⚚   STAFF OF HERMES
U+269B  ⚛   ATOM SYMBOL
U+269C  ⚜   FLEUR-DE-LIS
U+269D  ⚝   OUTLINED WHITE STAR
U+269E  ⚞   THREE LINES CONVERGING RIGHT
U+269F  ⚟   THREE LINES CONVERGING LEFT
U+26A0  ⚠   WARNING SIGN
U+26A1  ⚡   HIGH VOLTAGE SIGN
U+26A2  ⚢   DOUBLED FEMALE SIGN
U+26A3  ⚣   DOUBLED MALE SIGN
U+26A4  ⚤   INTERLOCKED FEMALE AND MALE SIGN
U+26A5  ⚥   MALE AND FEMALE SIGN
U+26A6  ⚦   MALE WITH STROKE SIGN
U+26A7  ⚧   MALE WITH STROKE AND MALE AND FEMALE SIGN
U+26A8  ⚨   VERTICAL MALE WITH STROKE SIGN
U+26A9  ⚩   HORIZONTAL MALE WITH STROKE SIGN
U+26AA  ⚪   MEDIUM WHITE CIRCLE
U+26AB  ⚫   MEDIUM BLACK CIRCLE
U+26BD  ⚽   SOCCER BALL
U+26BE  ⚾   BASEBALL
U+26BF  ⚿   SQUARED KEY
U+26C0  ⛀   WHITE DRAUGHTSMAN
U+26C1  ⛁   WHITE DRAUGHTS KING
U+26C2  ⛂   BLACK DRAUGHTSMAN
U+26C3  ⛃   BLACK DRAUGHTS KING
U+26C4  ⛄   SNOWMAN WITHOUT SNOW
U+26C5  ⛅   SUN BEHIND CLOUD
U+26C6  ⛆   RAIN
U+26C7  ⛇   BLACK SNOWMAN
U+26C8  ⛈   THUNDER CLOUD AND RAIN
U+26C9  ⛉   TURNED WHITE SHOGI PIECE
U+26CA  ⛊   TURNED BLACK SHOGI PIECE
U+26CB  ⛋   WHITE DIAMOND IN SQUARE
U+26CC  ⛌   CROSSING LANES
U+26CD  ⛍   DISABLED CAR
U+26CE  ⛎   OPHIUCHUS
U+26CF  ⛏   PICK
U+26D0  ⛐   CAR SLIDING
U+26D1  ⛑   HELMET WITH WHITE CROSS
U+26D2  ⛒   CIRCLED CROSSING LANES
U+26D3  ⛓   CHAINS
U+26D4  ⛔   NO ENTRY
U+26D5  ⛕   ALTERNATE ONE-WAY LEFT WAY TRAFFIC
U+26D6  ⛖   BLACK TWO-WAY LEFT WAY TRAFFIC
U+26D7  ⛗   WHITE TWO-WAY LEFT WAY TRAFFIC
U+26D8  ⛘   BLACK LEFT LANE MERGE
U+26D9  ⛙   WHITE LEFT LANE MERGE
U+26DA  ⛚   DRIVE SLOW SIGN
U+26DB  ⛛   HEAVY WHITE DOWN-POINTING TRIANGLE
U+26DC  ⛜   LEFT CLOSED ENTRY
U+26DD  ⛝   SQUARED SALTIRE
U+26DE  ⛞   FALLING DIAGONAL IN WHITE CIRCLE IN BLACK SQUARE
U+26DF  ⛟   BLACK TRUCK
U+26E0  ⛠   RESTRICTED LEFT ENTRY-1
U+26E1  ⛡   RESTRICTED LEFT ENTRY-2
U+26E2  ⛢   ASTRONOMICAL SYMBOL FOR URANUS
U+26E3  ⛣   HEAVY CIRCLE WITH STROKE AND TWO DOTS ABOVE
U+26E4  ⛤   PENTAGRAM
U+26E5  ⛥   RIGHT-HANDED INTERLACED PENTAGRAM
U+26E6  ⛦   LEFT-HANDED INTERLACED PENTAGRAM
U+26E7  ⛧   INVERTED PENTAGRAM
U+26E8  ⛨   BLACK CROSS ON SHIELD
U+26E9  ⛩   SHINTO SHRINE
U+26EA  ⛪   CHURCH
U+26EB  ⛫   CASTLE
U+26EC  ⛬   HISTORIC SITE
U+26ED  ⛭   GEAR WITHOUT HUB
U+26EE  ⛮   GEAR WITH HANDLES
U+26EF  ⛯   MAP SYMBOL FOR LIGHTHOUSE
U+26F0  ⛰   MOUNTAIN
U+26F1  ⛱   UMBRELLA ON GROUND
U+26F2  ⛲   FOUNTAIN
U+26F3  ⛳   FLAG IN HOLE
U+26F4  ⛴   FERRY
U+26F5  ⛵   SAILBOAT
U+26F6  ⛶   SQUARE FOUR CORNERS
U+26F7  ⛷   SKIER
U+26F8  ⛸   ICE SKATE
U+26F9  ⛹   PERSON WITH BALL
U+26FA  ⛺   TENT
U+26FD  ⛽   FUEL PUMP
U+26FE  ⛾   CUP ON BLACK SQUARE
U+26FF  ⛿   WHITE FLAG WITH HORIZONTAL MIDDLE BLACK STRIPE
U+2701  ✁   UPPER BLADE SCISSORS
U+2702  ✂   BLACK SCISSORS
U+2703  ✃   LOWER BLADE SCISSORS
U+2704  ✄   WHITE SCISSORS
U+2705  ✅   WHITE HEAVY CHECK MARK
U+2706  ✆   TELEPHONE LOCATION SIGN
U+2707  ✇   TAPE DRIVE
U+2708  ✈   AIRPLANE
U+2709  ✉   ENVELOPE
U+270A  ✊   RAISED FIST
U+270B  ✋   RAISED HAND
U+270C  ✌   VICTORY HAND
U+270D  ✍   WRITING HAND
U+270E  ✎   LOWER RIGHT PENCIL
U+270F  ✏   PENCIL
U+2710  ✐   UPPER RIGHT PENCIL
U+2711  ✑   WHITE NIB
U+2712  ✒   BLACK NIB
U+2713  ✓   CHECK MARK
U+2714  ✔   HEAVY CHECK MARK
U+2715  ✕   MULTIPLICATION X
U+2716  ✖   HEAVY MULTIPLICATION X
U+2717  ✗   BALLOT X
U+2718  ✘   HEAVY BALLOT X
U+2719  ✙   OUTLINED GREEK CROSS
U+271A  ✚   HEAVY GREEK CROSS
U+271B  ✛   OPEN CENTRE CROSS
U+271C  ✜   HEAVY OPEN CENTRE CROSS
U+271D  ✝   LATIN CROSS
U+271E  ✞   SHADOWED WHITE LATIN CROSS
U+271F  ✟   OUTLINED LATIN CROSS
U+2720  ✠   MALTESE CROSS
U+2721  ✡   STAR OF DAVID
U+2722  ✢   FOUR TEARDROP-SPOKED ASTERISK
U+2723  ✣   FOUR BALLOON-SPOKED ASTERISK
U+2724  ✤   HEAVY FOUR BALLOON-SPOKED ASTERISK
U+2725  ✥   FOUR CLUB-SPOKED ASTERISK
U+2726  ✦   BLACK FOUR POINTED STAR
U+2727  ✧   WHITE FOUR POINTED STAR
U+2728  ✨   SPARKLES
U+2729  ✩   STRESS OUTLINED WHITE STAR
U+272A  ✪   CIRCLED WHITE STAR
U+272B  ✫   OPEN CENTRE BLACK STAR
U+272C  ✬   BLACK CENTRE WHITE STAR
U+272D  ✭   OUTLINED BLACK STAR
U+272E  ✮   HEAVY OUTLINED BLACK STAR
U+272F  ✯   PINWHEEL STAR
U+2730  ✰   SHADOWED WHITE STAR
U+2731  ✱   HEAVY ASTERISK
U+2732  ✲   OPEN CENTRE ASTERISK
U+2733  ✳   EIGHT SPOKED ASTERISK
U+2734  ✴   EIGHT POINTED BLACK STAR
U+2735  ✵   EIGHT POINTED PINWHEEL STAR
U+2736  ✶   SIX POINTED BLACK STAR
U+2737  ✷   EIGHT POINTED RECTILINEAR BLACK STAR
U+2738  ✸   HEAVY EIGHT POINTED RECTILINEAR BLACK STAR
U+2739  ✹   TWELVE POINTED BLACK STAR
U+273A  ✺   SIXTEEN POINTED ASTERISK
U+273B  ✻   TEARDROP-SPOKED ASTERISK
U+273C  ✼   OPEN CENTRE TEARDROP-SPOKED ASTERISK
U+273D  ✽   HEAVY TEARDROP-SPOKED ASTERISK
U+273E  ✾   SIX PETALLED BLACK AND WHITE FLORETTE
U+273F  ✿   BLACK FLORETTE
U+2740  ❀   WHITE FLORETTE
U+2741  ❁   EIGHT PETALLED OUTLINED BLACK FLORETTE
U+2742  ❂   CIRCLED OPEN CENTRE EIGHT POINTED STAR
U+2743  ❃   HEAVY TEARDROP-SPOKED PINWHEEL ASTERISK
U+2744  ❄   SNOWFLAKE
U+2745  ❅   TIGHT TRIFOLIATE SNOWFLAKE
U+2746  ❆   HEAVY CHEVRON SNOWFLAKE
U+2747  ❇   SPARKLE
U+2748  ❈   HEAVY SPARKLE
U+2749  ❉   BALLOON-SPOKED ASTERISK
U+274A  ❊   EIGHT TEARDROP-SPOKED PROPELLER ASTERISK
U+274B  ❋   HEAVY EIGHT TEARDROP-SPOKED PROPELLER ASTERISK
U+274C  ❌   CROSS MARK
U+274D  ❍   SHADOWED WHITE CIRCLE
U+274E  ❎   NEGATIVE SQUARED CROSS MARK
U+2753  ❓   BLACK QUESTION MARK ORNAMENT
U+2754  ❔   WHITE QUESTION MARK ORNAMENT
U+2755  ❕   WHITE EXCLAMATION MARK ORNAMENT
U+2756  ❖   BLACK DIAMOND MINUS WHITE X
U+2757  ❗   HEAVY EXCLAMATION MARK SYMBOL
U+275B  ❛   HEAVY SINGLE TURNED COMMA QUOTATION MARK ORNAMENT
U+275C  ❜   HEAVY SINGLE COMMA QUOTATION MARK ORNAMENT
U+275D  ❝   HEAVY DOUBLE TURNED COMMA QUOTATION MARK ORNAMENT
U+275E  ❞   HEAVY DOUBLE COMMA QUOTATION MARK ORNAMENT
U+275F  ❟   HEAVY LOW SINGLE COMMA QUOTATION MARK ORNAMENT
U+2760  ❠   HEAVY LOW DOUBLE COMMA QUOTATION MARK ORNAMENT
U+2761  ❡   CURVED STEM PARAGRAPH SIGN ORNAMENT
U+2762  ❢   HEAVY EXCLAMATION MARK ORNAMENT
U+2763  ❣   HEAVY HEART EXCLAMATION MARK ORNAMENT
U+2764  ❤   HEAVY BLACK HEART
U+2765  ❥   ROTATED HEAVY BLACK HEART BULLET
U+2766  ❦   FLORAL HEART
U+2767  ❧   ROTATED FLORAL HEART BULLET
U+276C  ❬   MEDIUM LEFT-POINTING ANGLE BRACKET ORNAMENT
U+276D  ❭   MEDIUM RIGHT-POINTING ANGLE BRACKET ORNAMENT
U+276E  ❮   HEAVY LEFT-POINTING ANGLE QUOTATION MARK ORNAMENT
U+276F  ❯   HEAVY RIGHT-POINTING ANGLE QUOTATION MARK ORNAMENT
U+2770  ❰   HEAVY LEFT-POINTING ANGLE BRACKET ORNAMENT
U+2771  ❱   HEAVY RIGHT-POINTING ANGLE BRACKET ORNAMENT
U+2794  ➔   HEAVY WIDE-HEADED RIGHTWARDS ARROW
U+2795  ➕   HEAVY PLUS SIGN
U+2796  ➖   HEAVY MINUS SIGN
U+2797  ➗   HEAVY DIVISION SIGN
U+2798  ➘   HEAVY SOUTH EAST ARROW
U+2799  ➙   HEAVY RIGHTWARDS ARROW
U+279A  ➚   HEAVY NORTH EAST ARROW
U+279B  ➛   DRAFTING POINT RIGHTWARDS ARROW
U+279C  ➜   HEAVY ROUND-TIPPED RIGHTWARDS ARROW
U+279D  ➝   TRIANGLE-HEADED RIGHTWARDS ARROW
U+279E  ➞   HEAVY TRIANGLE-HEADED RIGHTWARDS ARROW
U+279F  ➟   DASHED TRIANGLE-HEADED RIGHTWARDS ARROW
U+27A0  ➠   HEAVY DASHED TRIANGLE-HEADED RIGHTWARDS ARROW
U+27A1  ➡   BLACK RIGHTWARDS ARROW
U+27A2  ➢   THREE-D TOP-LIGHTED RIGHTWARDS ARROWHEAD
U+27A3  ➣   THREE-D BOTTOM-LIGHTED RIGHTWARDS ARROWHEAD
U+27A4  ➤   BLACK RIGHTWARDS ARROWHEAD
U+27A5  ➥   HEAVY BLACK CURVED DOWNWARDS AND RIGHTWARDS ARROW
U+27A6  ➦   HEAVY BLACK CURVED UPWARDS AND RIGHTWARDS ARROW
U+27A7  ➧   SQUAT BLACK RIGHTWARDS ARROW
U+27A8  ➨   HEAVY CONCAVE-POINTED BLACK RIGHTWARDS ARROW
U+27A9  ➩   RIGHT-SHADED WHITE RIGHTWARDS ARROW
U+27AA  ➪   LEFT-SHADED WHITE RIGHTWARDS ARROW
U+27AB  ➫   BACK-TILTED SHADOWED WHITE RIGHTWARDS ARROW
U+27AC  ➬   FRONT-TILTED SHADOWED WHITE RIGHTWARDS ARROW
U+27AD  ➭   HEAVY LOWER RIGHT-SHADOWED WHITE RIGHTWARDS ARROW
U+27AE  ➮   HEAVY UPPER RIGHT-SHADOWED WHITE RIGHTWARDS ARROW
U+27AF  ➯   NOTCHED LOWER RIGHT-SHADOWED WHITE RIGHTWARDS ARROW
U+27B0  ➰   CURLY LOOP
U+27B1  ➱   NOTCHED UPPER RIGHT-SHADOWED WHITE RIGHTWARDS ARROW
U+27B2  ➲   CIRCLED HEAVY WHITE RIGHTWARDS ARROW
U+27B3  ➳   WHITE-FEATHERED RIGHTWARDS ARROW
U+27B4  ➴   BLACK-FEATHERED SOUTH EAST ARROW
U+27B5  ➵   BLACK-FEATHERED RIGHTWARDS ARROW
U+27B6  ➶   BLACK-FEATHERED NORTH EAST ARROW
U+27B7  ➷   HEAVY BLACK-FEATHERED SOUTH EAST ARROW
U+27B8  ➸   HEAVY BLACK-FEATHERED RIGHTWARDS ARROW
U+27B9  ➹   HEAVY BLACK-FEATHERED NORTH EAST ARROW
U+27BA  ➺   TEARDROP-BARBED RIGHTWARDS ARROW
U+27BB  ➻   HEAVY TEARDROP-SHANKED RIGHTWARDS ARROW
U+27BC  ➼   WEDGE-TAILED RIGHTWARDS ARROW
U+27BD  ➽   HEAVY WEDGE-TAILED RIGHTWARDS ARROW
U+27BE  ➾   OPEN-OUTLINED RIGHTWARDS ARROW
U+27C0  ⟀   THREE DIMENSIONAL ANGLE
U+27E8  ⟨   MATHEMATICAL LEFT ANGLE BRACKET
U+27E9  ⟩   MATHEMATICAL RIGHT ANGLE BRACKET
U+27EA  ⟪   MATHEMATICAL LEFT DOUBLE ANGLE BRACKET
U+27EB  ⟫   MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET
U+27F0  ⟰   UPWARDS QUADRUPLE ARROW
U+27F1  ⟱   DOWNWARDS QUADRUPLE ARROW
U+27F2  ⟲   ANTICLOCKWISE GAPPED CIRCLE ARROW
U+27F3  ⟳   CLOCKWISE GAPPED CIRCLE ARROW
U+27F4  ⟴   RIGHT ARROW WITH CIRCLED PLUS
U+27F5  ⟵   LONG LEFTWARDS ARROW
U+27F6  ⟶   LONG RIGHTWARDS ARROW
U+27F7  ⟷   LONG LEFT RIGHT ARROW
U+27F8  ⟸   LONG LEFTWARDS DOUBLE ARROW
U+27F9  ⟹   LONG RIGHTWARDS DOUBLE ARROW
U+27FA  ⟺   LONG LEFT RIGHT DOUBLE ARROW
U+27FB  ⟻   LONG LEFTWARDS ARROW FROM BAR
U+27FC  ⟼   LONG RIGHTWARDS ARROW FROM BAR
U+27FD  ⟽   LONG LEFTWARDS DOUBLE ARROW FROM BAR
U+27FE  ⟾   LONG RIGHTWARDS DOUBLE ARROW FROM BAR
U+27FF  ⟿   LONG RIGHTWARDS SQUIGGLE ARROW
U+2900  ⤀   RIGHTWARDS TWO-HEADED ARROW WITH VERTICAL STROKE
U+2901  ⤁   RIGHTWARDS TWO-HEADED ARROW WITH DOUBLE VERTICAL STROKE
U+2902  ⤂   LEFTWARDS DOUBLE ARROW WITH VERTICAL STROKE
U+2903  ⤃   RIGHTWARDS DOUBLE ARROW WITH VERTICAL STROKE
U+2904  ⤄   LEFT RIGHT DOUBLE ARROW WITH VERTICAL STROKE
U+2905  ⤅   RIGHTWARDS TWO-HEADED ARROW FROM BAR
U+2906  ⤆   LEFTWARDS DOUBLE ARROW FROM BAR
U+2907  ⤇   RIGHTWARDS DOUBLE ARROW FROM BAR
U+2908  ⤈   DOWNWARDS ARROW WITH HORIZONTAL STROKE
U+2909  ⤉   UPWARDS ARROW WITH HORIZONTAL STROKE
U+290A  ⤊   UPWARDS TRIPLE ARROW
U+290B  ⤋   DOWNWARDS TRIPLE ARROW
U+290C  ⤌   LEFTWARDS DOUBLE DASH ARROW
U+290D  ⤍   RIGHTWARDS DOUBLE DASH ARROW
U+290E  ⤎   LEFTWARDS TRIPLE DASH ARROW
U+290F  ⤏   RIGHTWARDS TRIPLE DASH ARROW
U+2910  ⤐   RIGHTWARDS TWO-HEADED TRIPLE DASH ARROW
U+2911  ⤑   RIGHTWARDS ARROW WITH DOTTED STEM
U+2912  ⤒   UPWARDS ARROW TO BAR
U+2913  ⤓   DOWNWARDS ARROW TO BAR
U+2914  ⤔   RIGHTWARDS ARROW WITH TAIL WITH VERTICAL STROKE
U+2915  ⤕   RIGHTWARDS ARROW WITH TAIL WITH DOUBLE VERTICAL STROKE
U+2916  ⤖   RIGHTWARDS TWO-HEADED ARROW WITH TAIL
U+2917  ⤗   RIGHTWARDS TWO-HEADED ARROW WITH TAIL WITH VERTICAL STROKE
U+2918  ⤘   RIGHTWARDS TWO-HEADED ARROW WITH TAIL WITH DOUBLE VERTICAL STROKE
U+2919  ⤙   LEFTWARDS ARROW-TAIL
U+291A  ⤚   RIGHTWARDS ARROW-TAIL
U+291B  ⤛   LEFTWARDS DOUBLE ARROW-TAIL
U+291C  ⤜   RIGHTWARDS DOUBLE ARROW-TAIL
U+291D  ⤝   LEFTWARDS ARROW TO BLACK DIAMOND
U+291E  ⤞   RIGHTWARDS ARROW TO BLACK DIAMOND
U+291F  ⤟   LEFTWARDS ARROW FROM BAR TO BLACK DIAMOND
U+2920  ⤠   RIGHTWARDS ARROW FROM BAR TO BLACK DIAMOND
U+2921  ⤡   NORTHWEST AND SOUTH EAST ARROW
U+2922  ⤢   NORTHEAST AND SOUTH WEST ARROW
U+2923  ⤣   NORTH WEST ARROW WITH HOOK
U+2924  ⤤   NORTH EAST ARROW WITH HOOK
U+2925  ⤥   SOUTH EAST ARROW WITH HOOK
U+2926  ⤦   SOUTH WEST ARROW WITH HOOK
U+2927  ⤧   NORTH WEST ARROW AND NORTH EAST ARROW
U+2928  ⤨   NORTH EAST ARROW AND SOUTH EAST ARROW
U+2929  ⤩   SOUTH EAST ARROW AND SOUTH WEST ARROW
U+292A  ⤪   SOUTH WEST ARROW AND NORTH WEST ARROW
U+292B  ⤫   RISING DIAGONAL CROSSING FALLING DIAGONAL
U+292C  ⤬   FALLING DIAGONAL CROSSING RISING DIAGONAL
U+292D  ⤭   SOUTH EAST ARROW CROSSING NORTH EAST ARROW
U+292E  ⤮   NORTH EAST ARROW CROSSING SOUTH EAST ARROW
U+292F  ⤯   FALLING DIAGONAL CROSSING NORTH EAST ARROW
U+2930  ⤰   RISING DIAGONAL CROSSING SOUTH EAST ARROW
U+2931  ⤱   NORTH EAST ARROW CROSSING NORTH WEST ARROW
U+2932  ⤲   NORTH WEST ARROW CROSSING NORTH EAST ARROW
U+2933  ⤳   WAVE ARROW POINTING DIRECTLY RIGHT
U+2934  ⤴   ARROW POINTING RIGHTWARDS THEN CURVING UPWARDS
U+2935  ⤵   ARROW POINTING RIGHTWARDS THEN CURVING DOWNWARDS
U+2936  ⤶   ARROW POINTING DOWNWARDS THEN CURVING LEFTWARDS
U+2937  ⤷   ARROW POINTING DOWNWARDS THEN CURVING RIGHTWARDS
U+2938  ⤸   RIGHT-SIDE ARC CLOCKWISE ARROW
U+2939  ⤹   LEFT-SIDE ARC ANTICLOCKWISE ARROW
U+293A  ⤺   TOP ARC ANTICLOCKWISE ARROW
U+293B  ⤻   BOTTOM ARC ANTICLOCKWISE ARROW
U+293C  ⤼   TOP ARC CLOCKWISE ARROW WITH MINUS
U+293D  ⤽   TOP ARC ANTICLOCKWISE ARROW WITH PLUS
U+293E  ⤾   LOWER RIGHT SEMICIRCULAR CLOCKWISE ARROW
U+293F  ⤿   LOWER LEFT SEMICIRCULAR ANTICLOCKWISE ARROW
U+2940  ⥀   ANTICLOCKWISE CLOSED CIRCLE ARROW
U+2941  ⥁   CLOCKWISE CLOSED CIRCLE ARROW
U+2942  ⥂   RIGHTWARDS ARROW ABOVE SHORT LEFTWARDS ARROW
U+2943  ⥃   LEFTWARDS ARROW ABOVE SHORT RIGHTWARDS ARROW
U+2944  ⥄   SHORT RIGHTWARDS ARROW ABOVE LEFTWARDS ARROW
U+2945  ⥅   RIGHTWARDS ARROW WITH PLUS BELOW
U+2946  ⥆   LEFTWARDS ARROW WITH PLUS BELOW
U+2962  ⥢   LEFTWARDS HARPOON WITH BARB UP ABOVE LEFTWARDS HARPOON WITH BARB DOWN
U+2963  ⥣   UPWARDS HARPOON WITH BARB LEFT BESIDE UPWARDS HARPOON WITH BARB RIGHT
U+2964  ⥤   RIGHTWARDS HARPOON WITH BARB UP ABOVE RIGHTWARDS HARPOON WITH BARB DOWN
U+2965  ⥥   DOWNWARDS HARPOON WITH BARB LEFT BESIDE DOWNWARDS HARPOON WITH BARB RIGHT
U+2966  ⥦   LEFTWARDS HARPOON WITH BARB UP ABOVE RIGHTWARDS HARPOON WITH BARB UP
U+2967  ⥧   LEFTWARDS HARPOON WITH BARB DOWN ABOVE RIGHTWARDS HARPOON WITH BARB DOWN
U+2968  ⥨   RIGHTWARDS HARPOON WITH BARB UP ABOVE LEFTWARDS HARPOON WITH BARB UP
U+2969  ⥩   RIGHTWARDS HARPOON WITH BARB DOWN ABOVE LEFTWARDS HARPOON WITH BARB DOWN
U+296A  ⥪   LEFTWARDS HARPOON WITH BARB UP ABOVE LONG DASH
U+296B  ⥫   LEFTWARDS HARPOON WITH BARB DOWN BELOW LONG DASH
U+296C  ⥬   RIGHTWARDS HARPOON WITH BARB UP ABOVE LONG DASH
U+296D  ⥭   RIGHTWARDS HARPOON WITH BARB DOWN BELOW LONG DASH
U+296E  ⥮   UPWARDS HARPOON WITH BARB LEFT BESIDE DOWNWARDS HARPOON WITH BARB RIGHT
U+296F  ⥯   DOWNWARDS HARPOON WITH BARB LEFT BESIDE UPWARDS HARPOON WITH BARB RIGHT
U+2989  ⦉   Z NOTATION LEFT BINDING BRACKET
U+298A  ⦊   Z NOTATION RIGHT BINDING BRACKET
U+2991  ⦑   LEFT ANGLE BRACKET WITH DOT
U+2992  ⦒   RIGHT ANGLE BRACKET WITH DOT
U+2993  ⦓   LEFT ARC LESS-THAN BRACKET
U+2994  ⦔   RIGHT ARC GREATER-THAN BRACKET
U+2995  ⦕   DOUBLE LEFT ARC GREATER-THAN BRACKET
U+2996  ⦖   DOUBLE RIGHT ARC LESS-THAN BRACKET
U+29A8  ⦨   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING UP AND RIGHT
U+29A9  ⦩   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING UP AND LEFT
U+29AA  ⦪   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING DOWN AND RIGHT
U+29AB  ⦫   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING DOWN AND LEFT
U+29AC  ⦬   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING RIGHT AND UP
U+29AD  ⦭   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING LEFT AND UP
U+29AE  ⦮   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING RIGHT AND DOWN
U+29AF  ⦯   MEASURED ANGLE WITH OPEN ARM ENDING IN ARROW POINTING LEFT AND DOWN
U+29BE  ⦾   CIRCLED WHITE BULLET
U+29BF  ⦿   CIRCLED BULLET
U+29C9  ⧉   TWO JOINED SQUARES
U+29CE  ⧎   RIGHT TRIANGLE ABOVE LEFT TRIANGLE
U+29CF  ⧏   LEFT TRIANGLE BESIDE VERTICAL BAR
U+29D0  ⧐   VERTICAL BAR BESIDE RIGHT TRIANGLE
U+29D1  ⧑   BOWTIE WITH LEFT HALF BLACK
U+29D2  ⧒   BOWTIE WITH RIGHT HALF BLACK
U+29D3  ⧓   BLACK BOWTIE
U+29D4  ⧔   TIMES WITH LEFT HALF BLACK
U+29D5  ⧕   TIMES WITH RIGHT HALF BLACK
U+29D6  ⧖   WHITE HOURGLASS
U+29D7  ⧗   BLACK HOURGLASS
U+29E8  ⧨   DOWN-POINTING TRIANGLE WITH LEFT HALF BLACK
U+29E9  ⧩   DOWN-POINTING TRIANGLE WITH RIGHT HALF BLACK
U+29EA  ⧪   BLACK DIAMOND WITH DOWN ARROW
U+29EB  ⧫   BLACK LOZENGE
U+29EC  ⧬   WHITE CIRCLE WITH DOWN ARROW
U+29ED  ⧭   BLACK CIRCLE WITH DOWN ARROW
U+29F4  ⧴   RULE-DELAYED
U+29FC  ⧼   LEFT-POINTING CURVED ANGLE BRACKET
U+29FD  ⧽   RIGHT-POINTING CURVED ANGLE BRACKET
U+29FE  ⧾   TINY
U+29FF  ⧿   MINY
U+2B00  ⬀   NORTH EAST WHITE ARROW
U+2B01  ⬁   NORTH WEST WHITE ARROW
U+2B02  ⬂   SOUTH EAST WHITE ARROW
U+2B03  ⬃   SOUTH WEST WHITE ARROW
U+2B04  ⬄   LEFT RIGHT WHITE ARROW
U+2B05  ⬅   LEFTWARDS BLACK ARROW
U+2B06  ⬆   UPWARDS BLACK ARROW
U+2B07  ⬇   DOWNWARDS BLACK ARROW
U+2B08  ⬈   NORTH EAST BLACK ARROW
U+2B09  ⬉   NORTH WEST BLACK ARROW
U+2B0A  ⬊   SOUTH EAST BLACK ARROW
U+2B0B  ⬋   SOUTHWEST BLACK ARROW
U+2B0C  ⬌   LEFT RIGHT BLACK ARROW
U+2B0D  ⬍   UP DOWN BLACK ARROW
U+2B0E  ⬎   RIGHTWARDS ARROW WITH TIP DOWNWARDS
U+2B0F  ⬏   RIGHTWARDS ARROW WITH TIP UPWARDS
U+2B10  ⬐   LEFTWARDS ARROW WITH TIP DOWNWARDS
U+2B11  ⬑   LEFTWARDS ARROW WITH TIP UPWARDS
U+2B12  ⬒   SQUARE WITH TOP HALF BLACK
U+2B13  ⬓   SQUARE WITH BOTTOM HALF BLACK
U+2B14  ⬔   SQUARE WITH UPPER RIGHT DIAGONAL HALF BLACK
U+2B15  ⬕   SQUARE WITH LOWER LEFT DIAGONAL HALF BLACK
U+2B16  ⬖   DIAMOND WITH LEFT HALF BLACK
U+2B17  ⬗   DIAMOND WITH RIGHT HALF BLACK
U+2B18  ⬘   DIAMOND WITH TOP HALF BLACK
U+2B19  ⬙   DIAMOND WITH BOTTOM HALF BLACK
U+2B1A  ⬚   DOTTED SQUARE
U+2B1B  ⬛   BLACK LARGE SQUARE
U+2B1C  ⬜   WHITE LARGE SQUARE
U+2B1D  ⬝   BLACK VERY SMALL SQUARE
U+2B1E  ⬞   WHITE VERY SMALL SQUARE
U+2B1F  ⬟   BLACK PENTAGON
U+2B20  ⬠   WHITE PENTAGON
U+2B21  ⬡   WHITE HEXAGON
U+2B22  ⬢   BLACK HEXAGON
U+2B23  ⬣   HORIZONTAL BLACK HEXAGON
U+2B24  ⬤   BLACK LARGE CIRCLE
U+2B25  ⬥   BLACK MEDIUM DIAMOND
U+2B26  ⬦   WHITE MEDIUM DIAMOND
U+2B27  ⬧   BLACK MEDIUM LOZENGE
U+2B28  ⬨   WHITE MEDIUM LOZENGE
U+2B29  ⬩   BLACK SMALL DIAMOND
U+2B2A  ⬪   BLACK SMALL LOZENGE
U+2B2B  ⬫   WHITE SMALL LOZENGE
U+2B30  ⬰   LEFT ARROW WITH SMALL CIRCLE
U+2B31  ⬱   THREE LEFTWARDS ARROWS
U+2B32  ⬲   LEFT ARROW WITH CIRCLED PLUS
U+2B33  ⬳   LONG LEFTWARDS SQUIGGLE ARROW
U+2B34  ⬴   LEFTWARDS TWO-HEADED ARROW WITH VERTICAL STROKE
U+2B35  ⬵   LEFTWARDS TWO-HEADED ARROW WITH DOUBLE VERTICAL STROKE
U+2B36  ⬶   LEFTWARDS TWO-HEADED ARROW FROM BAR
U+2B37  ⬷   LEFTWARDS TWO-HEADED TRIPLE DASH ARROW
U+2B38  ⬸   LEFTWARDS ARROW WITH DOTTED STEM
U+2B39  ⬹   LEFTWARDS ARROW WITH TAIL WITH VERTICAL STROKE
U+2B3A  ⬺   LEFTWARDS ARROW WITH TAIL WITH DOUBLE VERTICAL STROKE
U+2B3B  ⬻   LEFTWARDS TWO-HEADED ARROW WITH TAIL
U+2B3C  ⬼   LEFTWARDS TWO-HEADED ARROW WITH TAIL WITH VERTICAL STROKE
U+2B3D  ⬽   LEFTWARDS TWO-HEADED ARROW WITH TAIL WITH DOUBLE VERTICAL STROKE
U+2B3E  ⬾   LEFTWARDS ARROW THROUGH X
U+2B3F  ⬿   WAVE ARROW POINTING DIRECTLY LEFT
U+2B40  ⭀   EQUALS SIGN ABOVE LEFTWARDS ARROW
U+2B41  ⭁   REVERSE TILDE OPERATOR ABOVE LEFTWARDS ARROW
U+2B42  ⭂   LEFTWARDS ARROW ABOVE REVERSE ALMOST EQUAL TO
U+2B43  ⭃   RIGHTWARDS ARROW THROUGH GREATER-THAN
U+2B44  ⭄   RIGHTWARDS ARROW THROUGH SUPERSET
U+2B45  ⭅   LEFTWARDS QUADRUPLE ARROW
U+2B46  ⭆   RIGHTWARDS QUADRUPLE ARROW
U+2B47  ⭇   REVERSE TILDE OPERATOR ABOVE RIGHTWARDS ARROW
U+2B48  ⭈   RIGHTWARDS ARROW ABOVE REVERSE ALMOST EQUAL TO
U+2B49  ⭉   TILDE OPERATOR ABOVE LEFTWARDS ARROW
U+2B4A  ⭊   LEFTWARDS ARROW ABOVE ALMOST EQUAL TO
U+2B4B  ⭋   LEFTWARDS ARROW ABOVE REVERSE TILDE OPERATOR
U+2B4C  ⭌   RIGHTWARDS ARROW ABOVE REVERSE TILDE OPERATOR
U+2B50  ⭐   WHITE MEDIUM STAR
U+2B51  ⭑   BLACK SMALL STAR
U+2B52  ⭒   WHITE SMALL STAR
U+2B53  ⭓   BLACK RIGHT-POINTING PENTAGON
U+2B54  ⭔   WHITE RIGHT-POINTING PENTAGON
U+2B55  ⭕   HEAVY LARGE CIRCLE
U+2B56  ⭖   HEAVY OVAL WITH OVAL INSIDE
U+2B57  ⭗   HEAVY CIRCLE WITH CIRCLE INSIDE
U+2B58  ⭘   HEAVY CIRCLE
U+2B59  ⭙   HEAVY CIRCLED SALTIRE

---

选项2:纯CSS v字形

您可以只使用CSS有效地创建v形标志

(不需要图片)。

这很容易操作:

旋转 厚度 颜色 大小

---

点击查看jsfiddle上的演示

---

---

CSS (高效的跨浏览器支持)

.chevron { 位置:相对; 显示:块; 高度:50 px;/*高度应该是双边框*/ ｝ .chevron::, {后.chevron:: 位置:绝对的; 显示:块; 内容:“”; 边框:25px实体透明;/ * * /调整大小 ｝ /*用左/右/下替换下面所有的' top '以旋转*/ {前.chevron:: 上图:0; border-top-color: # b00;* / / *雪佛龙颜色 ｝ {后.chevron:: 前:-10像素;/ * * /调整厚度 border-top-color: # fff;/*匹配背景颜色*/ ｝ 雪佛龙<我类= " " > < / i >

---

选项3:CSS base64图像图标

UP - DOWN

下来

UP

只需使用几行CSS，我们就可以将图像编码为base64。

---

点击查看jsfiddle上的演示

---

PROS

不需要以图像或字体的形式包含额外的资源。 支持完全alpha透明。 全面的跨浏览器支持。 小图像/图标可以存储在数据库中。

CONS

更新/编辑可能会成为一个麻烦。 不适合大图像，因为生成了过多的代码标记。

CSS

.sorting,
.sorting_asc,
.sorting_desc{
    padding:4px 21px 4px 4px;
    cursor:pointer;
}
.sorting{
    background:url(data:image/gif;base64,R0lGODlhCwALAJEAAAAAAP///xUVFf///yH5BAEAAAMALAAAAAALAAsAAAIUnC2nKLnT4or00PvyrQwrPzUZshQAOw==) no-repeat center right;
}
.sorting_asc{
    background:url(data:image/gif;base64,R0lGODlhCwALAJEAAAAAAP///xUVFf///yH5BAEAAAMALAAAAAALAAsAAAIRnC2nKLnT4or00Puy3rx7VQAAOw==) no-repeat center right;
}
.sorting_desc{
    background:url(data:image/gif;base64,R0lGODlhCwALAJEAAAAAAP///xUVFf///yH5BAEAAAMALAAAAAALAAsAAAIPnI+py+0/hJzz0IruwjsVADs=) no-repeat center right;
}

空三角形的HTML实体 不知道对不对; △= &#9655; ▽= &#9661; △= &#9651;

有几种正确的方法来显示指向下的三角形。

方法一:使用十进制HTML实体

HTML:

▼

---

方法二:使用十六进制HTML实体

HTML:

▼

---

方法三:直接使用字符

HTML:

▼

---

方法四:使用CSS

HTML:

<span class='icon-down'></span>

CSS:

.icon-down:before {
    content: "\25BC";
}

---

这三个方法中的每一个都应该有相同的输出。对于其他符号，同样存在三个选项。有些甚至有第四个选项，允许您使用基于字符串的引用(例如。心;显示♥)。

您可以使用类似Unicode-table.com的参考网站来查找UNICODE支持哪些图标以及它们对应的代码。例如，您可以在http://unicode-table.com/en/25BC/上找到指向下的三角形的值。

请注意，这些方法仅对每个浏览器中默认可用的图标有效。对于像☃，´，★，☂，☭，⎗或⎘这样的符号，这种情况的可能性要小得多。虽然可以为其他UNICODE符号提供跨浏览器的支持，但这个过程有点复杂。

如果你想知道如何添加对不太常见的UNICODE字符的支持，请参阅使用UNICODE补充多语言平面符号创建webfont以获得更多关于如何做到这一点的信息。

---

背景图片

一个完全不同的策略是使用背景图片而不是字体。为了获得最佳性能，最好通过基本编码将图像嵌入到CSS文件中，如eg所述。@weasel5i2和@Obsidian。我建议使用SVG而不是GIF，因为它在性能和符号的清晰度方面都更好。

下面的代码是图标的base64和SVG版本:

/* size: 0.9kb */
url(data:image/svg+xml;base64,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

何时使用背景图像或字体

对于许多用例来说，基于svg的背景图像和图标字体在性能和灵活性方面是相当的。要决定选择哪一个，请考虑以下差异:

SVG图像

它们可以有多种颜色 它们可以嵌入自己的CSS和/或由HTML文档设置样式 它们可以作为一个单独的文件加载，嵌入到CSS和HTML中 每个符号都由XML代码或base64代码表示。不能在代码编辑器中直接使用字符或使用HTML实体 当XML代码嵌入到HTML中时，多次使用同一符号意味着重复该符号。在CSS中嵌入文件或将其作为单独的文件加载时，不需要复制 您不能使用颜色、字体大小、行高、背景颜色或其他与字体相关的样式规则来更改图标的显示，但您可以将图标的不同组件单独引用为形状。 您需要了解SVG和/或base64编码 旧版本IE的支持有限或不支持

图标的字体

一个图标只能有一种填充色、一种背景色等。 图标可以嵌入到CSS或HTML中。在HTML中，可以直接使用字符，也可以使用HTML实体来表示字符。 一些符号可以在不使用webfont的情况下显示。大多数符号都不能。 当你的字符嵌入到HTML中时，多次使用同一个符号意味着重复该符号。在CSS中嵌入文件时，不需要复制。 您可以使用颜色、字体大小、行高、背景色或其他与字体相关的样式规则来更改图标的显示 你不需要特殊的技术知识 支持所有主流浏览器，包括旧版本的IE

就我个人而言，只有当你需要多种颜色，而这些颜色无法通过颜色、背景颜色和其他与字体颜色相关的CSS规则来实现时，我才会推荐使用background-images。

使用SVG图像的主要好处是可以为符号的不同组件赋予它们自己的样式。如果您将SVG XML代码嵌入到HTML文档中，这与样式化HTML非常相似。然而，这将导致网页同时使用HTML标记和SVG标记，这可能会显著降低网页的可读性。如果符号在多个页面中重复出现，还会增加额外的负担，而且您需要考虑到旧版本的IE没有或有限支持SVG。

这里是另一个-ᐞ- Unicode U+141E / CANADIAN syllable GLOTTAL STOP

这个似乎暗示030和031是上下三角形。

(正如bobince指出的，这似乎不是ASCII标准)