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javascriptajaxfacebooklong-polling

What is for(;;) in Facebook long poling request?

Hi i have question which means for (;;); in Facebook long polling request ? This statement is in every file which is long polled from Facebook server.

Thank you

Solution

  • No way this infinite loop is executed; just try it in your console. A simple operation like integer incrementing will freeze your screen:

    
    var a = 1;
    for (;;) {
        a++;
    }

    It may be just a small trap for anyone who tries to eval their script, or something.