setInterval加速| Java脚本

Question

I'm trying to gradually depreciate the interval in which the function inside a setinterval function is executed

Here's abstracted code for principle:

var speed = 100;
window.setInterval( speed-= 0.01 , speed);

Am I correct in believing the value for speed is taken once, on the first execution of setInterval and used, instead of being taken at every execution. If so, how can I get around this? I verified this by setting the interval to 1000 and setting the "speed-=" to 999, and then printing the value for speed. The value jumped from 1000 to 1 but then kept going down by 999, and even after the value became negative the functions inside setinterval were executed every 1 second.

Answer 1

An example of recursive call of setTimeout with changing interval.

 function go() { var node = document.createElement('div'); node.innerHTML = speed.toFixed(2); document.body.appendChild(node); if (speed > 1) { setTimeout(go, speed); } speed *= 0.9; } var speed = 100; go();