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Form validation

Method of setting required fields and field types without requiring JavaScript. This includes preventing forms from being submitted when appropriate, the checkValidity() method as well as support for the :invalid, :valid, and :required CSS pseudo-classes.

Spec https://html.spec.whatwg.org/multipage/forms.html#client-side-form-validation
Status WHATWG Living Standard
IE Edge Firefox Chrome Safari Opera
      108    
    107 107 TP  
    106 106 16.1  
11 105 105 105 16.0 91
10 104 104 104 15.6 90
9 103 103 103 15.5 89
8 102 102 102 15.4 88
Show all
7 101 101 101 15.2-15.3 87
6 100 100 100 15.1 86
5.5 99 99 99 15 85
  98 98 98 14.1 84
  97 97 97 14 83
  96 96 96 13.1 82
  95 95 95 13 81
  94 94 94 12.1 80
  93 93 93 12 79
  92 92 92 11.1 78
  91 91 91 11 77
  90 90 90 10.1 76
  89 89 89 10 (1) 75
  88 88 88 9.1 (1) 74
  87 87 87 9 (1) 73
  86 86 86 8 (1) 72
  85 85 85 7.1 (1) 71
  84 84 84 7 (1) 70
  83 83 83 6.1 (1) 69
  81 82 81 6 (1) 68
  80 81 80 5.1 (1) 67
  79 80 79 5 (1) 66
  18 79 78 4 65
  17 78 77 3.2 64
  16 77 76 3.1 63
  15 76 75   62
  14 75 74   60
  13 74 73   58
  12 73 72   57
    72 71   56
    71 70   55
    70 69   54
    69 68   53
    68 67   52
    67 66   51
    66 65   50
    65 64   49
    64 63   48
    63 62   47
    62 61   46
    61 60   45
    60 59   44
    59 58   43
    58 57   42
    57 56   41
    56 55   40
    55 54   39
    54 53   38
    53 52   37
    52 51   36
    51 50   35
    50 49   34
    49 48   33
    48 47   32
    47 46   31
    46 45   30
    45 44   29
    44 43   28
    43 42   27
    42 41   26
    41 40   25
    40 39   24
    39 38   23
    38 37   22
    37 36   21
    36 35   20
    35 34   19
    34 33   18
    33 32   17
    32 31   16
    31 30   15
    30 29   12.1
    29 28   12
    28 27   11.6
    27 26   11.5
    26 25   11.1
    25 24   11
    24 23   10.6
    23 22   10.5
    22 21   10.0-10.1
    21 20   9.5-9.6
    20 19   9
    19 18    
    18 17    
    17 16    
    16 15    
    15 14    
    14 13    
    13 12    
    12 11    
    11 10    
    10 9    
    9 8    
    8 7    
    7 6    
    6 5    
    5 4    
    4      
    3.6      
    3.5      
    3      
    2      
Safari on iOS Opera Mini Android Browser Blackberry Browser Opera Mobile Android Chrome Android Firefox IE Mobile Android UC Browser Samsung Internet QQ Browser Baidu Browser KaiOS Browser
16.1                        
16.0 all (3) 105 10 64 105 104 11 (2) 13.4 18.0 13.1 13.18 2.5 (1)
15.6   4.4.3-4.4.4 7 (1) 12.1     10 (2)   17.0      
15.5   4.4 (1)   12         16.0      
15.4   4.2-4.3 (1)   11.5         15.0      
Show all
15.2-15.3   4.1 (1)   11.1         14.0      
15.0-15.1   4 (1)   11         13.0      
14.5-14.8   3   10         12.0      
14.0-14.4   2.3             11.1-11.2      
13.4-13.7   2.2             10.1      
13.3   2.1             9.2      
13.2                 8.2      
13.0-13.1                 7.2-7.4      
12.2-12.5                 6.2-6.4      
12.0-12.1                 5.0-5.4      
11.3-11.4                 4      
11.0-11.2                        
10.3                        
10.0-10.2 (1)                        
9.3 (1)                        
9.0-9.2 (1)                        
8.1-8.4 (1)                        
8 (1)                        
7.0-7.1 (1)                        
6.0-6.1 (1)                        
5.0-5.1 (1)                        
4.2-4.3 (1)                        
4.0-4.1 (1)                        
3.2                        

Notes

  1. Partial support refers to lack of notice when form with required fields is attempted to be submitted.

  2. Partial support in IE10 mobile refers to lack of warning when blocking submission.

  3. Partial support in Opera Mini refers to only supporting the CSS pseudo classes.

Bugs

  • IE10 and 11 have a problem validating number fields in combination with the step attribute and certain values

  • In Chrome (tested in 45) inputs marked as disabled or hidden while also marked as required are incorrectly being considered for constraint validation. https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled

  • IE & Edge do not support :valid on form elements. Firefox<51 seemed to only match :valid on forms after child element values have changed from an invalid to valid state; see bug #1285425.

Resources

Data by caniuse.com
Licensed under the Creative Commons Attribution License v4.0.
https://caniuse.com/form-validation