如何立即启动setInterval循环? [英] How to start setInterval loop immediately?
问题描述
在一个简单的 setInterval
setInterval(function() {
// Do something every 9 seconds
}, 9000);
第一个动作将在9秒后发生( t = 9s
)。如何强制循环立即执行第一个操作( t = 0
)?
The first action will happen after 9 seconds (t=9s
). How to force the loop to perform the first action immediately (t=0
)?
我认为它应该到期到 setInterval
的机制有延迟 - 动作 - 延迟 - 动作...
循环;而不是动作 - 延迟 - 动作 - 延迟...
循环。
I think it is due to the mechanism of setInterval
to have Delay - Action - Delay - Action ...
loop; instead of Action - Delay - Action - Delay ...
loop.
编辑:我的函数确实是一个循环
My function is indeed a loop as
setInterval(function(){
$('.test').each(function(idx){
var duration = 1000;
$(this).delay(duration*idx);
Some stuff here
});
}, 4000);
推荐答案
保持简单。您可以使用命名函数而不是匿名函数;调用它并设置它的间隔。
Keep it simple. You can use a named function instead of an anonymous function; call it and set an interval for it.
function doSomething() {
console.log("tick");
}
doSomething();
setInterval(doSomething, 9000);
如有必要,请创建范围:
Create a scope if necessary:
(function() {
function doSomething() {
console.log("tick");
}
doSomething();
setInterval(doSomething, 9000);
})();
最后,以下工作无需创建或影响 x
:
Finally, the following works without creating or affecting x
:
setInterval(function x() {
console.log("tick");
return x;
}(), 9000);
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