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Server-sent events

Method of continuously sending data from a server to the browser, rather than repeatedly requesting it (EventSource interface, used to fall under HTML5)

Spec https://html.spec.whatwg.org/multipage/comms.html#server-sent-events
Status WHATWG Living Standard
IE Edge Firefox Chrome Safari Opera
    60 66    
    59 65   50
  17 58 64 TP 49
11 16 57 63 11 48
10 15 56 62 10.1 47
9 14 55 61 10 46
8 13 54 60 9.1 45
Show all
7 12 53 59 9 44
6   52 58 8 43
5.5   51 57 7.1 42
    50 56 7 41
    49 55 6.1 40
    48 54 6 39
    47 53 5.1 38
    46 52 5 37
    45 51 4 36
    44 50 3.2 35
    43 49 3.1 34
    42 48   33
    41 47   32
    40 46   31
    39 45   30
    38 44   29
    37 43   28
    36 42   27
    35 41   26
    34 40   25
    33 39   24
    32 38   23
    31 37   22
    30 36   21
    29 35   20
    28 34   19
    27 33   18
    26 32   17
    25 31   16
    24 30   15
    23 29   12.1
    22 28   12
    21 27   11.6
    20 26   11.5
    19 25   11.1
    18 24   11
    17 23   10.6
    16 22   10.5
    15 21   10.0-10.1
    14 20   9.5-9.6
    13 19   9
    12 18    
    11 17    
    10 16    
    9 15    
    8 14    
    7 13    
    6 12    
    5 11    
    4 10    
    3.6 9    
    3.5 8    
    3 7    
    2 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
11.0-11.2 all 62 10 37 62 57 11 11.4 6.2 1.2 7.12
10.3   4.4.3-4.4.4 7 12.1     10   5    
10.0-10.2   4.4   12         4    
9.3   4.2-4.3   11.5              
Show all
9.0-9.2   4.1   11.1              
8.1-8.4   4   11              
8   3   10              
7.0-7.1   2.3                  
6.0-6.1   2.2                  
5.0-5.1   2.1                  
4.2-4.3                      
4.0-4.1                      
3.2                      

Notes

Bugs

  • Reportedly, CORS in EventSource is currently supported in Firefox 10+, Opera 12+, Chrome 26+, Safari 7.0+.

  • In Firefox prior to version 36 server-sent events do not reconnect automatically in case of a connection interrupt (bug)

  • Firefox 52 and below do not support EventSource in web/shared workers

  • Antivirus software may block the event streaming data chunks.

Resources

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