JavaScript setInterval 使 AJAX post 每 X 分钟？

Question

下面是我正在处理的计时器脚本中的 JavaScript setInterval 函数。

它基本上是每秒计算一个时间。我想要做的是 post 这次每 2 分钟向服务器发送一次 AJAX 请求。

我只需要帮助确定何时达到每 2 分钟，以便我可以插入我的 AJAX 代码。

谁能告诉我如何在下面的代码中确定每 2 分钟的间隔？

timer.interval = setInterval(tick = function () {
    /* Don't do anything if the timer is paused */
    if (timer.paused) return;

    /* Calculate the number of seconds from the startTime */
    var sec = M.max(M.round((Date.now() - startTime) * dir / 1000), 0);

    var val = {
        S: sec,                     /* Total number of seconds */
        s: sec % 60,                /* Seconds */
        M: M.floor(sec /= 60),      /* Total minutes */
        H: M.floor(sec /= 60),      /* Total hours */
        D: M.floor(sec /= 24)       /* Total days */
    };
    val.m = val.M % 60;             /* Minutes */
    val.h = val.H % 24;             /* Hours */
    val.d = val.D;                  /* Days */

    /* Format the timer */
    val.text = (options.format || '%-H{:}%0m:%0s').replace(
        /%(-?)(0?)([dhms])(\s*)(?:\{(.+?)\})?/ig,
        options.replacer || function (match, omit, zero, part, space, forms) {
            /* The value of the selected part */
            var v = val[part];

            /*
             * 'day'      -> [ 'day', 'day', 'day' ]
             * 'day|days' -> [ 'day', 'days', 'days' ]
             */
            (forms = (forms||'').split('|'))[2] =
                forms[2] || (forms[1] = forms[1] || forms[0]);

            /*
             * Return the output text, or an empty string if the value is
             * zero and isn't supposed to be shown
             */
            return !v && omit ? '' :
                /*
                 * Initialize the output text with the value (and optionally
                 * a leading zero)
                 */
                (v > 9 ? '' : zero) + v + space +

                /* Add the appropriate form */
                forms[+(v != 1) +
                    (v != 1 && (v%10 < 2 || v%10 > 4) ||
                        (v > 10 && v < 20))];
        });

    /*
     * If we have an element, put the formatted text inside it
     * (otherwise, set "timerElem" to this instance of tinyTimer, so that it gets
     * passed to callbacks)
     */
    timerElem ? $(timerElem).html(val.text) : timerElem = timer;

    /* Invoke the onTick callback (if defined) */
    (options.onTick || doNothing).call(timerElem, timer.val = val);


}, 1000);

Answer 1

您可以为此添加一个 计数器 来计算您的呼叫，当它达到 120 时，然后调用 ajax 到 post 数据.

var counter  = 0 ;
timer.interval = setInterval(tick = function () {

   /// your stuff
   counter++;
   if(counter == 120)
   {
       /// make ajax call 
       /// then
       counter  = 0;
    }

}, 1000);

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