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CSS Generated content for pseudo-elements

Method of displaying text or images before or after the given element's contents using the ::before and ::after pseudo-elements. All browsers with support also support the attr() notation in the content property.

Spec https://www.w3.org/TR/CSS21/generate.html
Status W3C Recommendation
IE Edge Firefox Chrome Safari Opera
      73    
    65 72    
    64 71 TP  
11 18 63 70 12 56
10 17 62 69 11.1 55
9 16 61 68 11 54
8 (1) 15 60 67 10.1 53
Show all
7 14 59 66 10 52
6 13 58 65 9.1 51
5.5 12 57 64 9 50
    56 63 8 49
    55 62 7.1 48
    54 61 7 47
    53 60 6.1 46
    52 59 6 45
    51 58 5.1 44
    50 57 5 43
    49 56 4 42
    48 55 3.2 41
    47 54 3.1 40
    46 53   39
    45 52   38
    44 51   37
    43 50   36
    42 49   35
    41 48   34
    40 47   33
    39 46   32
    38 45   31
    37 44   30
    36 43   29
    35 42   28
    34 41   27
    33 40   26
    32 39   25
    31 38   24
    30 37   23
    29 36   22
    28 35   21
    27 34   20
    26 33   19
    25 32   18
    24 31   17
    23 30   16
    22 29   15
    21 28   12.1
    20 27   12
    19 26   11.6
    18 25   11.5
    17 24   11.1
    16 23   11
    15 22   10.6
    14 21   10.5
    13 20   10.0-10.1
    12 19   9.5-9.6
    11 18   9
    10 17    
    9 16    
    8 15    
    7 14    
    6 13    
    5 12    
    4 11    
    3.6 10    
    3.5 9    
    3 8    
    2 7    
      6    
      5    
      4    
iOS Safari Opera Mini Android Browser Blackberry Browser Opera Mobile Android Chrome Android Firefox IE Mobile Android UC Browser Samsung Internet QQ Browser Baidu Browser
12 all 67 10 46 70 63 11 11.8 7.2 1.2 7.12
11.3-11.4   4.4.3-4.4.4 7 12.1     10   6.2    
11.0-11.2   4.4   12         5    
10.3   4.2-4.3   11.5         4    
Show all
10.0-10.2   4.1   11.1              
9.3   4   11              
9.0-9.2   3   10              
8.1-8.4   2.3                  
8   2.2                  
7.0-7.1   2.1                  
6.0-6.1                      
5.0-5.1                      
4.2-4.3                      
4.0-4.1                      
3.2                      

Notes

For content to appear in pseudo-elements, the content property must be set (but may be an empty string).

  1. IE8 only supports the single-colon CSS 2.1 syntax (i.e. :pseudo-class). It does not support the double-colon CSS3 syntax (i.e. ::pseudo-element).

Bugs

  • Chrome supports CSS transitions on generated content as of v. 26. Safari v6 and below do not support transitions or animations on pseudo elements.

  • IE9, IE10, IE11 ignore CSS rem units in the line-height property. Bug report.

  • Firefox & Edge do not support :after and :before for input fields

Resources

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
http://caniuse.com/#feat=css-gencontent