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I need to set interval in javascript.
I currently have javascript code whose execution is delayed, I need that code to be executed every x seconds. Is there any way to do that?
var delayInMilliseconds = 3000; //1 second
setTimeout(function() {
//MY CODE HERE
}, delayInMilliseconds);
Thank you
You want to use setInterval. It will execute the function every x milliseconds.
const delayInMilliseconds = 3000;
setInterval(() => {
// Your code here
}, delayInMilliseconds);
you can use setInterval() function:
var delayInMilliseconds = 3000; //1 second
setInterval(function() {
// do stuff
}, delayInMilliseconds);
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my stopwatch with javascript and I don't get this point
buttonStart.addEventListener("click", () => {
if (Interval) {
clearInterval(Interval); }
Interval = setInterval(startTimer, 10); });
The second value it receives is the number of milliseconds between repetitions. Meaning each 10 milliseconds it will run the startTimer function.
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how to change itens in a table with javascript, every 15 seconds using uinnerHTML:
document.getElementById("iten1").innerHTML = "Bla Bla Bla";
You can create a recursive timeout loop.
function timeout() {
setTimeout(function () {
// Do Something Here
// Then recall the parent function to
// create a recursive loop.
timeout();
}, 1000);
}
If you're new to setTimeout() MDN has a pretty straightforward guide you can play around with. : setTimeout MDN
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I would like you to tell me if there is an event that returns to me when it was the last time a user touched the screen, since I need a function to run 3 seconds after the user touched the screen for the last time
There's no specific event for your use-case. What you can do however is adding a click event listener to your window object and assign the current time to a global variable as soon as someone clicked the screen. Additionally you have to use JavaScript's setInterval() method, which executes a function periodically e.g. every 20 ms. Inside it's callback function you can compare the current time to the time stored in the global variable and if the difference is bigger than 3000 trigger your action.
Here's an example (just click 'Run code snippet'):
var timeClicked;
function screenClicked() {
timeClicked = new Date();
}
function check() {
if (timeClicked != null) {
if (new Date() - timeClicked > 3000) {
clearInterval(interval);
alert("time's up!");
}
}
}
window.addEventListener("click", screenClicked);
var interval = setInterval(check, 20);
<body bgcolor="#eeeeee"><span>click anywhere inside this window</span></body>
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I have to make a kind of playlist of events, where each event has a specific play time and the next one has to play after the time's up and so on.
Currently I'm using the setTimeout function. Now I would need to loop to get my events and times.
My code:
for(let i = 0; i < playlist.length ; i++){
setTimeout(function(){
$('#ventana').attr({src: playlist[i].url_play});
}, playlist[i].time_play*i);
}
But the timing is not right. How can I correct this?
It will indeed not work if you set the delay to playlist[i].time_play*i: think of it... It does not take into account the delays for past playlists, only the current one -- multiplied by its index(??).
Instead you would need to accumulate the different delays, for instance in a delay variable:
for (let i = 0, delay = 0; i < playlist.length ; delay += playlist[i].time_play, i++) {
setTimeout(function() {
$('#ventana').attr({src: playlist[i].url_play});
}, delay);
}
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So here is my code and I want to add 1 to total every second`
var doughnut = 0;
function myFunction(){
document.getElementById("total").innerHTML = " total: " + setInterval(doughnut +1, 1000) ;
}
Can you explain me how setInterval() works and where to put it?
setInterval accepts two arguments:
The "What": The function to execute
The "When": interval time in milliseconds to execute that function
Basically each second (1000 ms) the function increments the doughnut value and writes the updated value to the HTML element with id total.
Try this:
var doughnut = 0;
setInterval(function () {
doughnut++;
document.getElementById("total").innerHTML = " total: " + doughnut;
}, 1000);