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JavaScript - Help With Local Variable In Settimeout
Hello, I am reading a block of code online and I don't understand why the output i in "Checking the value of: i " is always 5.
Code: var someArray = [1,2,3,4,5],
len = someArray.length,
i = 0;
var count = 0;
for ( ; i < len; i++ ) {
setTimeout(function() {
console.log( count++ === i, 'Checking the value of: ' + i );
}, i * 300);
}
This will produce output below in console.log: Code: false Checking the value of: 5 false Checking the value of: 5 false Checking the value of: 5 false Checking the value of: 5 false Checking the value of: 5 The tutorial says the code will only render the final value in the sequence: 5 but not 1, 2, 3, 4, 5 as I would expect in the for loop. Could someone explain this to me. Thanks very much. Similar Tutorialsfunction test() { var DIV = document.createElement('DIV'); } If I never insert DIV to any node its parentNode is null and being a local variuable it's reference is lost. Is it destroyed? or do I have to add it to a node then use removeChild? How to: pass local variable from <head> JS function to <body> textarea I have a JS function in the head that calculates a variable. the function is triggered by the vevent of a button click. when calculation is done, how is it sent back to the page and placed in a textarea or textbox....?? /Beginner issues :/ Hi trying to load a random swf files using setTimeout please help Code: </head><script type="text/javascript">
var numberOfSongs = 3
var sound = new Array(numberOfSongs+1)
sound[1]= "number/1.mp3"
sound[2]= "number/2.mp3"
sound[3]= "number/3.mp3"
function randomNumber(){
var randomLooper = -1
while (randomLooper < 0 || randomLooper > numberOfSongs || isNaN(randomLooper)){ randomLooper = parseInt(Math.random()*(numberOfSongs+1))
}
return randomLooper
}
var randomsub = randomNumber()
var soundFile = sound[randomsub]
document.write ('<EMBED src= "' + soundFile + '" hidden=true autostart=true loop=false>')
setTimeout(randomNumber,4000);
</script>
<body onload="randomNumber()">
Is there another JS function that I can use to force a time delay without having the code continue to run? I'm using the setTimeout() function but the call to this function doesn't stop the code flow. I need to stop the code flow while waiting. I guess I need a Sleep() type of JS function. What I'm trying to do is display some blank text on the screen using a for loop (I'm using <BR> to give the appearance of "opening up" a vertical window section in the browser) and I need this 'text' to complete before allowing the following code in the function to execute. The following code will display a Table with rows of data. I'm trying to use a timing function to give a visual impression of a window opening up just before the data displays. Thanks... Hello - I've got this lovely little animation that slides some div fields to the right a short distance. Everything works except the setTimeout (located in the SlideIn function). It simply 'jumps' without taking any time at all. I've tried a bunch of stuff: changed the amount of time from 100 to 10000 changed it from var t = setTimeout("SlideIn()", 1000) SlideIn with/without the brackets, with/without the quotation marks. SlideIn() SlideIn(i) SlideIn(label_id_fixed) SlideIn(label_id_no) Just about at the end of my rope, and so many different combinations I'm forgetting which ones I've tried and which I haven't. I know it is looping through because it gets to the end position and allows the other JavaScript functions to work ok. So it is not getting 'stuck' or anything like that. Here is the complete code (there is a style sheet located separately). Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="class.css" />
</head>
<script type="text/javascript">
//<![CDATA[
window.onload=starter;
function starter(){
collapseMenu();
SetUpAnimation();
}
function SetUpAnimation(){
if (document.querySelectorAll)
{
labels = document.querySelectorAll('div.label');
}
else if (document.getElementsByClassName)
{
labels = document.getElementsByClassName('label');
}
//loops through the labels
if (labels){
for (var i=1; i <= labels.length; i++)
{SlideIn(i);
}
}
}
function SlideIn(label_id_no){
var label_id_fixed = label_id_no;
var endPos = 150;
var currentPos = 0;
for (currentPos = 1; currentPos < 60; currentPos++){
var label_id_name = "label" + label_id_fixed;
document.getElementById(label_id_name).style.left = currentPos + "px";
setTimeout("SlideIn", 1000);
}
}
function collapseMenu(){
var elems = null;
var labels = null;
if (document.querySelectorAll)
{
elems = document.querySelectorAll('div.elements');
labels = document.querySelectorAll('div.label');
}
else if (document.getElementsByClassName)
{
elems = document.getElementsByClassName('elements');
labels = document.getElementsByClassName('label');
}
if (elems){
for (var i=0; i < elems.length; i++)
{
elems[i].style.display="none";
}
for (var i=0; i < labels.length; i++)
{
labels[i].onclick=showBlock;
}
}
}
function showBlock(evnt){
var theEvent = evnt ? evnt : window.event;
var theSrc = theEvent.target ? theEvent.target: theEvent.srcElement;
var itemId = "elements" + theSrc.id.substr(5,1);
var item = document.getElementById(itemId);
if (item.style.display=='none'){
item.style.display='block';
}else{
item.style.display='none';
}
}
//]]>
</script>
</head>
<body>
<div class="label" id="label1">this is a label</div>
<div class="elements" id="elements1">
<p>painting</p><br />
<p>photography</p><br />
</div>
<div class="label" id="label2">this is another label</div>
<div class="elements" id="elements2">
<p>sculpture</p><br />
<p>ceramics</p><br />
</div>
</body>
</html>
Hello guys I need to get something fun! with setTimeout function! I am n00b! so be patent please. I need when <body onload="Myfunc();"> fires, that function should show "Please wait...!" or "Loading...". for , say 5 seconds!. then it disappear. I used setTimeout with that but it didn't do what I wanted! here is my code: PHP Code: function Myfunc(){ document.getElementById("ss2").innerHTML = "Loading..."; setTimeout("Myfunc();", 5000); } // where id="ss2" is the place to display the string "loading..." ! and a one more question ! can I do something like a while loop! where it holds *i* value as seconds! and for every second it passes it should print out a string I make it up ! let say loop for 3 seconds ! So, when seconds = 0 then display "string of second 0" and stick it in there, then go to the next second when it is exactly = 1 then display "new line with string of second 1" and stick it in there, then do to the last second when it is exactly = 2 then display " new line with string of second 2" and stick it in there, exit the loop! is there anyway to do that? please note that I am a n00bie ! help is much appreciated ! Okay, for some reason the setTimeout isn't working for me, and I have no idea why. I've tried everything and Googled even more. If anyone has any ideas, I'll be grateful Code: function display(min,sec) {
if (sec <= 0) {
sec=60;
min-=1;
}
if (min <= -1) {
sec=0;
min=0;
tEnd();
} else {
sec = sec-1;
}
if (sec<=9) { sec = "0" +sec; }
document.form.time.value=min+":"+sec;
SM = window.setTimeout("display("+min+","+sec+")",1000);
}
function tEnd() {
window.clearTimeout(SM);
alert('Your time is up!');
}
Thanks in advance. Im fairly new to javascript, i have mostly been into php i have this code i wrote in one of my projects and i assume theres an easier way Code: setTimeout("check20()", 0);
setTimeout("check19()", 50);
setTimeout("check18()", 100);
setTimeout("check17()", 150);
setTimeout("check16()", 200);
setTimeout("check15()", 250);
setTimeout("check14()", 300);
setTimeout("check13()", 350);
setTimeout("check12()", 400);
setTimeout("check11()", 450);
setTimeout("check10()", 500);
setTimeout("check9()", 550);
setTimeout("check8()", 600);
setTimeout("check7()", 650);
setTimeout("check6()", 700);
setTimeout("check5()", 750);
setTimeout("check4()", 800);
setTimeout("check3()", 850);
setTimeout("check2()", 900);
setTimeout("check()", 950);
basically every 50 javascript seconds a function is activated, so that means i have a **** ton of function too all doing the same thing just to different ids If you know of a better way let me know please I'm trying to set a timer when someone moves off of an image. When I try my event without the timer there are no problems but it throws syntax or object expected errors (if I play with the quotes some) when I add in the timer. This is inline code on the image. onMouseout="newsTimer = setTimeout("Effect.toggle('news', 'slide')", 500)"; It is likely something simple I am overlooking but I cannot find any answers after a long search. Thank you for any and all help. So I have a very simple block of code: Code: function successfulReg() {
alert(1);
// $.colorbox({ html: '<p>Registration successful!</p>' });
}
if ($('#regSuc').size()) setTimeout('successfulReg', 1000);
If the regSuc item exists (1 second after the page loads), I want to bring up a lightbox. As I couldn't get this to work, I tried to get an alert to show up. This did not work either. I changed the setTimeout to Code: if ($('#regSuc').size()) setTimeout('alert(1), 1000);
Which did work. And I tried successfulReg and succesfulReg(), neither of which worked. Am I missing some basic element to getting a timeout to work? I have a code snippet here. Everything in it works as expected. However the setTimeout does not seems to be working. It should be an infinite loops updating the contents of the table every 5 sec. However the table shows once when first called and the setTimeout never seems to kick in. Any help in getting that loop to work would be greatly appreciated. Code: statTick : function (){
var t = Tabs.Train;
var m = '<TABLE class=pbTabPad>';
clearTimeout (t.statTimer);
for (var c=0; c<Seed.s.cities.length; c++){
var last = serverTime();
var trains = [];
m += '<TR><TD>City #'+ (c+1) +' ';
for (var t=0; t<Seed.s.cities[c].jobs.length; t++){
if (Seed.s.cities[c].jobs[t].queue=='units' && Seed.s.cities[c].jobs[t].unit_type)
trains.push (Seed.s.cities[c].jobs[t]);
}
if (trains.length == 0)
m += 'idle</TD></TR>';
else {
for (var j=0; j<trains.length; j++){
var left='', tot='';
if (j==0)
left = 'Training ';
else if (j==trains.length-1)
tot = '   <B>('+ timestrShort(trains[j].run_at-serverTime()) +')</b>';
m += left + trains[j].quantity +' '+ trains[j].unit_type + ' '+ timestr(trains[j].run_at-last, true) + tot +'</TD></TR>';
last = trains[j].run_at;
}
}
}
document.getElementById('pbtrnTrnStat').innerHTML = m +'</table>';
t.statTimer = setTimeout (t.statTick, 5000);
},
I'm trying to delay this line by 1 second, but can't seem to figure out the syntax. Code: window.location.href="index.php?vid_id="+<?php echo $vid_id +1 ?>; this is the entire function Code: $('#cancel').click(function() {
$.ajax({
type: "POST",
url: "scripts/greenlight.php?vid_id="+<?php echo $vid_id ?>,
data: "vote=2",
success: function(){
}});
document.getElementById("greenlight").src="img/greenlight_btns/greenlight_btn.png";
document.getElementById("cancel").src="img/greenlight_btns/cancel_btnOver.png";
//window.location.href="index.php?vid_id="+<?php echo $vid_id +1 ?>
window.setTimeout(function()
{
window.location.href="index.php?vid_id="+<?php echo $vid_id +1 ?>;
}, 500);
}); // end click
[CODE] function slide(dir, i) { //getW() gets the width of the window //i is initally set to 0 var w = getW(); if(i < w) { document.getElementById('page').style.left = (document.getElementById('page').offsetLeft - 1)+"px"; i++; setTimeout("slide("+dir+", "+i+")", 100); } } [/ CODE] the function executes from it's initial calling but never calls itself back up Hi all, I've noticed that setTimeout seems to return a simple integer as it's "id" which can be used to clear the timeout ahead of time. So, in order to have multiple setTimeouts called (which requires the previous one to be cleared before the next one is called), I simply did this: Code: clearTimeout(setTimeout(function() {
/* some code */
}, 1000) -1);
Note the "-1"... each time this code is called, it starts a new setTimeout and clears "instance-1" which is supposed to be the previous instance. The idea is that this block can be called hundreds of times, and when the calling finally stops, the inner code is executed 1 second later. This SEEMS to be working (yes, even in MSIE!). Question is, am I fooling myself? Is this wrong? If so, what's the right way to do it? Thanks... -- Roger (btw, the actual use of this is dynamic resizing of a DIV by dragging the corner with the mouse.... I want the actual PX size to display live while resizing, then after resizing stops, the size display goes away 1 second later... in case you were wondering). Code: function funt()
{
var link = document.getElementsByClassName("class")[0];
if(link != null)
{
var i = 0;
if(check != link.childNodes[i])
{
link.childNodes[i].click();
check = link.childNodes[i];
}
else
{
window.location = "website"
}
}
else
{
if(document.getElementById('enbut').value != "some value")
{
document.getElementById('id').click();
}
window.location = "website"
}
t=setTimeout("funt()",3000);
}
with this i'm trying to get it to loop every 3 seconds using the settimeout function at the end of the loop. each time i run this it just runs once and exits. anyone know what i'm doing wrong? I'm working on a disjointed rollover, with several links changing an image in another location. There is a default image that appears when the page opens and whenever you roll off any of the links. Initially, the problem was that mousing from one link to the next caused a quick flash of the default image because there is a little space between these links. To address that, I added a time out to keep the default image from appearing immediately on onmouseout. Now, when I mouse from one link to the next I get a smooth transition, but then the delayed onmouseout function kicks in while still hovering over a link. How can I make hovering over a new link override this delayed onmouseout? Here's the script: Code: <script type="text/javascript">
window.onload = preloader()
function preloader(){
var pic1 = new Image();
pic1.src = "images/cover1.jpg";
var pic2 = new Image();
pic1.src = "images/cover2.jpg";
var pic3 = new Image();
pic1.src = "images/cover3.jpg";
var pic4 = new Image();
pic1.src = "images/cover4.jpg";
}
function bookInfoSwap(imgSrc,ID,bInfo) {
document.getElementById("covers").src = imgSrc;
document.getElementById("courseID").innerHTML = ID;
document.getElementById("bookInfo").innerHTML = bInfo;
}
function swapDelay() {
setTimeout("bookInfoRevert()",3000);
}
function bookInfoRevert() {
document.getElementById("covers").src = "images/covers.gif";
document.getElementById("courseID").innerHTML = " ";
document.getElementById("bookInfo").innerHTML = " ";
}
</script>
...and a couple of the links: Code: <a href="http://www.mymathlab.com/" target="_blank" onmouseover="bookInfoSwap('images/cover6.jpg','Self Study Course ID: <br />cos68804','Billstein, <em>A Problem Solving approach to Mathematics for Elementary School Teachers, 9/e and Custom Edition</em>');" onmouseout="swapDelay();" class="courseTab">Math 10/11</a>
<a href="http://www.mymathlab.com/" target="_blank" onmouseover="bookInfoSwap('images/cover4.jpg','Self Study Course ID: <br />cos59796','Sullivan, <em>Statistics: Informed Decisions Using Data, 3/e</em>');" onmouseout="swapDelay();" class="courseTab">Math 21</a>
Thanks. hi, i'm making a page with an image on it. when that image is clicked i want it to make one div visible, and also run the javascript function to make a second div visible after 2 seconds. Everything seems to work correctly except that the javascript runs on page load instead of waiting for when the image is clicked. any help much appreciated. thanks! Here's the javascript: <code <script type="text/javascript"> function showIt() { document.getElementById("show_1").style.visibility = "visible"; } setTimeout("showIt()", 2000); </script> </head> </code> Here's the html: <code> <div id="flyer1">content <div id="show_1" style="visibility:hidden">content </div> </div> <div id="image"> <a href="javascript:void(0)" onclick="MM_showHideLayers('flyer1', '','show')"; "showIt()">image</a> </div> </code> I wrote the code below to animate a roll of dice. It does iterate 10 times, as the code intends, but for some reason it doesn't pause in between. Also, how can I get it to return the final dice value to the calling function? Code: DiceValue=RollDiceAnimated(1)
function RollDiceAnimated(RollIteration) {
var Die1;var Die2
var RollSpeed=100
Die1=0;while(Die1<1 || Die1>6){Die1=Math.floor(Math.random()*7)}
Die2=0;while(Die2<1 || Die2>6){Die2=Math.floor(Math.random()*7)}
document.getElementById("Dice1").src="Images_Dice/Dice" + Die1 + ".jpg"
document.getElementById("Dice2").src="Images_Dice/Dice" + Die2 + ".jpg"
if(RollIteration<10){
var tempval=setTimeout(RollDiceAnimated(RollIteration+1),RollIteration*RollSpeed)
}
else{return Die1+Die2}
}
Hi there The JavaScript below behaves erratically - sometimes the timing is perfect, at other times it show 20 mins has passed when only 6 has in reallity - quite some gain - I'm baffled! Code: Public Function SessionTime(ByVal DivName As Panel) As String
Dim vTime As String = "var sessionTimeout = 19; " & vbCr
vTime += "function ReadCookie(cookieName) " & vbCr
vTime += "{ " & vbCr
vTime += "var theCookie=""""+document.cookie; var ind=theCookie.indexOf(cookieName); " & vbCr
vTime += "if (ind==-1 || cookieName=="""") return """";" & vbCr
vTime += "var ind1=theCookie.indexOf(';',ind); " & vbCr
vTime += "if (ind1==-1) ind1=theCookie.length; " & vbCr
vTime += "return unescape(theCookie.substring(ind+cookieName.length+1,ind1));" & vbCr
vTime += "} " & vbCr
vTime += "function DisplaySessionTimeout()" & vbCr
vTime += "{ " & vbCr
'assigning minutes left to session timeout to Label
vTime += "if (sessionTimeout > 1) " & vbCr
vTime += "{ " & vbCr
vTime += "document.getElementById('" & DivName.ClientID & "').innerText = sessionTimeout + "" Minutes remaining until session timeout!""; " & vbCr
vTime += "} " & vbCr
vTime += "else " & vbCr
vTime += "{ " & vbCr
vTime += "document.getElementById('" & DivName.ClientID & "').innerText = ""ONLY ONE MINUTE REMAINS UNTIL SESSION TIMEOUT!""; " & vbCr
vTime += "}" & vbCr
vTime += "sessionTimeout = sessionTimeout - 1; " & vbCr
vTime += "var Posted = ReadCookie('PostedValue'); " & vbCr
vTime += "if (Posted == 0)" & vbCr
vTime += "{ " & vbCr
vTime += "sessionTimeout = 19; " & vbCr
vTime += "var expires = new Date(); " & vbCr
vTime += "expires.setUTCFullYear(expires.getUTCFullYear() + 1); " & vbCr
vTime += "document.cookie = 'PostedValue=1; expires=' + expires.toUTCString() + '; path=/'; " & vbCr
vTime += "}" & vbCr
'if session is under preset warning
vTime += "if (sessionTimeout > 5) " & vbCr '<--------------- 4
vTime += "{ " & vbCr
vTime += "document.getElementById('" & DivName.ClientID & "').style.visibility=""hidden""; " & vbCr
vTime += "}" & vbCr
vTime += "else " & vbCr
vTime += "{" & vbCr
vTime += "document.getElementById('" & DivName.ClientID & "').style.visibility=""visible""; " & vbCr
vTime += "}" & vbCr
'if session is not less than 0
vTime += "if (sessionTimeout >= 1) " & vbCr
'call the function again after 1 minute delay
vTime += "{ " & vbCr
vTime += "setTimeout('DisplaySessionTimeout()', 60000); " & vbCr '<------60000
vTime += "} " & vbCr
vTime += "else " & vbCr
vTime += "{ " & vbCr
'show message box
vTime += "alert(""Your current Session will expire in approx one minute""); " & vbCr
vTime += "} " & vbCr
'vTime += "alert(""Set to "" + ReadCookie('PostedValue')); " & vbCr
vTime += "} " & vbCr
vTime += "DisplaySessionTimeout();" & vbCr
Return vTime
End Function
Hello I am just learning, what am I doing wrong here , I'm trying to display an image after 3 seconds after the page opens with js from an external file listed below: Code: <html>
<title>Insert Page</title>
<body>
var call;
call=("<?php echo $image1;?>");
function myfunction()
{
setTimeout =(call, 3000);
}
document.write(myfunction);
</body> </html> |
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