刚遇到这个.它并没有真正影响任何东西,但我想知道为什么会发生.

如果我在带firebug的firefox中运行以下代码：

setInterval(function(param) 
     {
        console.log("param is %o",param)
     },500);

参数似乎被分配了一个模糊的随机值：

   param is -2
    param is -1
    param is -2
    param is 1
    param is -1
    param is 6
    param is -1
    param is 0
    param is -2
    param is 2
    param is 0
    param is 2
    param is 0
    param is 0
    param is 0
[..]
    param is 0
    param is 0
    param is 0
    param is 0
    param is 0
    param is 0
    param is 0
    param is 911
    param is 0
    param is 0
    param is 0
    param is -1

我确实感谢我没有将任何参数传递给setInterval来传递给函数,但是javascript为什么选择传递此随机数？

我本来期望undefined或类似的东西…

干杯

ps.尚未在其他浏览器中进行过测试

解决方法:

它似乎取决于Firefox的CPU使用率.

我猜这是从应该调用回调开始的延迟.

编辑：I was right.这是回调调用被延迟的毫秒数.