Is there any way to kill a setInterval loop through an Onclick button
So, I got an infinite loop to work in this function using setInterval attached to an onClick. Problem is, I can't stop it using clearInterval in an onClick. I think this is because when I attach a clearInterval to an onClick, it kills a specific interval and not the function altogether. Is there anything I can do to kill all intervals through an onClick?
Here's my .js file and the calls I'm making are
input type="button" value="generate" onClick="generation();
input type="button" value="Infinite Loop!" onclick="setInterval('generation(开发者_开发技巧)',1000);"
input type="button" value="Reset" onclick="clearInterval(generation(),80;" // This one here is giving me trouble.
setInterval returns a handle, you need that handle so you can clear it
easiest, create a var for the handle in your html head, then in your onclick use the var
// in the head
var intervalHandle = null;
// in the onclick to set
intervalHandle = setInterval(....
// in the onclick to clear
clearInterval(intervalHandle);
http://www.w3schools.com/jsref/met_win_clearinterval.asp
clearInterval
is applied on the return value of setInterval
, like this:
var interval = null;
theSecondButton.onclick = function() {
if (interval === null) {
interval = setInterval(generation, 1000);
}
}
theThirdButton.onclick = function () {
if (interval !== null) {
clearInterval(interval);
interval = null;
}
}
Have generation();
call setTimeout
to itself instead of setInterval
. That was you can use a bit if logic in the function to prevent it from running setTimeout
quite easily.
var genTimer
var stopGen = 0
function generation() {
clearTimeout(genTimer) ///stop additional clicks from initiating more timers
. . .
if(!stopGen) {
genTimer = setTimeout(function(){generation()},1000)
}
}
}
Live demo
This is all you need!
<script type="text/javascript">
var foo = setInterval(timer, 1000);
function timer() {
var d = new Date();
var t = d.toLocaleTimeString();
document.getElementById("demo").innerHTML = t;
}
$(document).on("click", "#stop_clock", function() {
clearInterval(foo);
$("#stop_clock").empty().append("Done!");
});
</script>
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