I'm not sure why the interval isn't looping. I've followed tutorials exactly but not luck. Suggestions?
$(document).ready(function(){
setInterval(function() {
$('.current').removeClass('current').next().addClass('current');
}, 2000);
});
Updated: http://jsfiddle.net/pa7aU/3/
One possible ugly solution:
setInterval(function() {
var $current = $(".current").removeClass("current"),
$next = $current.next();
if ($next.length)
$next.addClass("current");
else
$current.siblings(":first").addClass("current");
}, 2000);
DEMO: http://jsfiddle.net/pa7aU/4/
$(document).ready(function () {
var $li = $('ul li'), i = 0, l = $li.length;
setInterval(function() {
$li.removeClass('current').eq(i % l).addClass('current');
i++;
}, 2000);
});
http://jsfiddle.net/chg4J/
When you reach the last element, you need to go back to the beginning, not use .next().
$(document).ready(function () {
setInterval(function () {
var next = $('.current').removeClass('current').next();
if (next.length == 0) {
next = $("li:first");
}
next.addClass('current');
}, 2000);
});
FIDDLE
When you are at the last li, next() doesnt go to the first.
An easy fix is to add that after :
if($('.current').length <= 0) $('li:first').addClass('current');
Fiddle : http://jsfiddle.net/pa7aU/5/
Just to add something new to the mix:
$(document).ready(function () {
setInterval(function () {
$('li').eq(($('.current').removeClass('current').index() + 1) % $('li').size()).addClass('current');
}, 200);
});
Related
I am using datatables plugin and using this for click:
$('.datatable').on('click', 'img#openpli-playlist', function(e) {
alert("You clicked OPENPLI ICON!");
});
Now I need to use jQuery plugin longclick and using this:
$('.datatable').longClick(function(e) {
alert("You clicked OPENPLI ICON!");
},1000);
So the problem is how can I add selector to longclick I try this for selector but is not working:
$('.datatable img#openpli-playlist').longClick(function(e) {
alert("You clicked OPENPLI ICON!");
},1000);
Can someone give me solution why is this not working?
Thanks
Simple fix will be:
var tmr = 0;
$(element).mousedown(function () {
tmr = setTimeout(function () {
alert("You clicked for 1 second! Wow!");
}, 1000);
}).mouseup(function () {
clearTimeout(tmr);
});
Now this can be used in delegation too:
var tmr = 0;
$(static_parent).on("mousedown", element, function () {
tmr = setTimeout(function () {
alert("You clicked for 1 second! Wow!");
}, 1000);
}).on("mouseup", element, function () {
clearTimeout(tmr);
});
Your solution:
var tmr = 0;
$('.datatable').on('mousedown', 'img#openpli-playlist', function(e) {
tmr = setTimeout(function () {
alert("You clicked OPENPLI ICON!");
}, 1000);
}).on('mouseup', 'img#openpli-playlist', function(e) {
clearTimeout(tmr);
});
As an improvement to previous answers, you can distinguish between click and long press in this way:
var tmr = 0;
var islong = 0;
$(element)
.mousedown(function () {
tmr = setTimeout(function () {
// Handle the long-press
alert("You clicked for 1 second!");
console.log("You clicked for 1 second!");
islong = 1;
}, 1000);
})
.mouseup(function () {
if (islong == 0) {
// Handle the click
alert("This is a click!");
console.log("This is a click!");
}
islong = 0;
clearTimeout(tmr);
});
I have the following elements in HTML:
<li class="myDiv">15</li>
<li class="myDiv">20</li>
and this jQuery:
setInterval(function() {
$(".myDiv").each(function () {
var $this = $(this);
var number = $this.html();
$this.html(parseInt(number) - 1);
})
}, 1000);
I am grabbing the number inside of the div and making it into a number, then I am substracting one every second.
How can I delete each individual div once the value inside that div reaches 0?
I have this working Fiddle that substracts every number inside of the div.
setInterval(function() {
$(".myDiv").each(function (idx, elem) {
var numb = parseInt( $(elem).html(), 10) - 1;
if (numb === 0) {
$(elem).remove();
}else{
$(elem).html(numb);
}
});
}, 1000);
Here is the JSFiddle
setInterval(function() {
$(".myDiv").each(function () {
var $this = $(this);
var number = $this.html();
$this.html(parseInt(number) - 1);
if($this.html() === '0') $this.remove();
})
}, 1000);
And you can do: if(parseInt($this.html(), 10) === 0) $this.remove(); instead if you want to really verify that it's a number.
Also as adeneo's answer includes, saying $this.html(parseInt(number, 10) - 1); is better than just $this.html(parseInt(number) - 1); as it tells JS that it's a base 10 (decimal) number and will help prevent possible problems with your code.
$this.html(parseInt(number) - 1);
if($this.html() == 0){
$this.remove();
}
Also why $this = $(this)? Why don't you just use $(this)?
How can I stop my javascript function when countdown = 0?
JS:
var settimmer = 0;
$(function(){
window.setInterval(function() {
var timeCounter = $("b[id=show-time]").html();
var updateTime = eval(timeCounter)- eval(1);
$("b[id=show-time]").html(updateTime);
}, 1000);
});
HTML:
<b id="show-time">20</b>
For one thing remove those evals. They don't do anything.
Then all you have to do is clear the timer when it reaches zero.
$(function(){
var timer = setInterval(function() {
var timeCounter = parseInt($("b[id=show-time]").text());
$("b[id=show-time]").text(--timeCounter); // remove one
if(!timeCounter) clearInterval(timer);
}, 1000);
});
It is easy! When you call setInterval it return an ID, so you can destroy the interval later. To destroy it you must use clearInterval(id), and voilà!
It works like this:
// Activate timer
var iv = window.setInterval(...);
// Deactive timer
window.clearInterval(iv);
Also you should use parseInt() instead of eval():
$(function() {
// Read the start value once and store it in a variable
var timeCounter = parseInt( $("b[id=show-time]").text() );
// Active the counter
var iv = window.setInterval(function() {
// Decrement by one and write back into the document
$("b[id=show-time]").text(--timeCounter);
// Check if counter == 0 -> stop counting
if (0 == timeCounter) {
window.clearInterval(iv);
// ...do whatever else needs to be done when counter == 0 ..
}
}, 1000);
});
Example:
var i = 0,
pid = setInterval(function() {
if (++i > 10)
clearInterval(pid);
}, 1000);
Based on what you wanted for your code ...
$(function() {
var el = document.getElementById('show-time'),
pid = setInterval(function() {
// (s - i) coerces s to Number
var t = el.innerHTML - 1;
el.innerHTML = t;
if (t < 1)
clearInterval(pid);
}, 1000);
});
Keep in mind that JS won't be 100% accurate with its timing.
Pasted code below or see the fiddle: http://jsfiddle.net/raHrm/
<script type="text/javascript">
$(function(){
var settimmer = 0,
timeCounter = $("#show-time").html(),
updateTime = timeCounter;
(function countDown() {
timeCounter = $("#show-time").html();
updateTime = parseInt(timeCounter)-1;
$("#show-time").html(updateTime);
if ( updateTime ) {
setTimeout(countDown, 1000);
}
})();
});
</script>
Set the timer to a variable, then use clearInterval in-order to stop the loop. As for catching the end, use a simple conditional:
$(function(){
var elem=$('strong[id="show-time"]'),settimmer=0,updateTime,t;
t=window.setInterval(function() {
updateTime=parseFloat(elem.html(),10)-1;
if(updateTime==0) {
window.clearInterval(t);
elem.html('Done!');
} else {
elem.html(updateTime);
}
},1000);
});
Then in the HTML:
<strong id="show-time">20</strong>
The <b> tag is depreciated, try to avoid using it. Also, there is no reason to eval() the HTML you are getting from the element; a simple parseFloat() works just fine.
I'm looking to start and stop a loop with a set delay with a jQuery hover event. I've been trying to do it with "mouseover" and "mouseout" with no luck.
Example (odd psudocode):
Mouseover
Loop
Change text colour
Wait 100ms
Mouseout
Stop loop
I'm sure this is super easy, I just don't quite know how to structure it with JavaScript.
Thanks in advance.
This might work:
$(function(){
$('#test').hover(function(){
var self = $(this),
rnd = null,
col = null;
this.iid = setInterval(function(){
col = ['#'];
rnd = ~~(Math.random()*255);
col.push(rnd.toString(16).length < 2 ? '0' + rnd.toString(16) : rnd.toString(16));
col.push(rnd.toString(16).length < 2 ? '0' + rnd.toString(16) : rnd.toString(16));
col.push(rnd.toString(16).length < 2 ? '0' + rnd.toString(16) : rnd.toString(16));
self.css({backgroundColor: col.join('')});
}, 100);
}, function(){
if(this.iid){
clearInterval(this.iid);
delete this.iid;
}
});
});
See this in action: http://www.jsfiddle.net/YjC6y/19/
function rgb() {
var color = 'rgb(';
for (var i = 0; i < 3; i++) {
color += Math.floor(Math.random() * 255) + ',';
}
return color.replace(/\,$/, ')')
}
var loop = null;
$(function () {
$('#someid').hover(function () {
var $this = $(this);
loop = setInterval(function () {
$this.css({backgroundColor: rgb() });
}, 100);
}, function () {
clearInterval(loop);
});
});
try an example : http://jsbin.com/uraxe4
$("#yourElem").hover(
function () { /* mousenter */
$this = $(this);
// take note that the mouse is currently hovering
$this.data("isHovering", true);
// create an interval and store its ID in jQuery data
$this.data("loopId", setInterval(function () {
// only do something if we are still hovering
if ($this.data("isHovering")) {
$this.css("color", getRandomColorValue());
}
}, 100);
},
function () { /* mouseleave */
$this = $(this);
// take note that the mouse is no longer hovering
$this.data("isHovering", false);
// clear the interval that was set and delete the ID
if ($this.data("loopId")) {
clearInterval($this.data("loopId"));
$this.data("loopId", false);
}
}
)
changeColorTimerId = -1;
$('.box').hover(function(){
//mouseOver code here
changeColorTimerId = setInterval ( changeColor, 1000 );
},function(){
//mouseOut code here
if ( changeColorTimerId ){
clearInterval ( changeColorTimerId )
}
});
function changeColor(){
$(".box").css ( 'backgroundColor', '' + getRandomColor() );
}
function getRandomColor(){
var letters = '0123456789ABCDEF'.split('');
var color = '#';
for (var i = 0; i < 6; i++ ) {
color += letters[Math.round(Math.random() * 15)];
}
return color;
}
working example here:
http://jsbin.com/etogi3/2
I want to make it so when I click somewhere in my website, the background changes. I have three backgrounds, and I want to make a loop of them.
$(document).ready(function() {
$('body').click((function(){
return function()
{
if (counter == null) {
var counter = 1;
}
if(counter == 3) {
$(this).css("background-image","url(3.jpg)");
$(this).css("background-position","10% 35%");
var counter = null;
}
if(counter == 2) {
$(this).css("background-image","url(2.jpg)");
$(this).css("background-position","10% 35%");
var counter = 3;
}
if(counter == 1) {
$(this).css("background-image","url(1.jpg)");
$(this).css("background-position","40% 35%");
var counter = 2;
}
}
})());
});
Why doesn't this work?
Your counter variable isn't scoped right, you need one counter variable. Overall though, why not let .toggle() manage this for you? Here's what it would look like:
$(function() {
$('body').toggle(function(){
$(this).css({"background-image":"url(1.jpg)", "background-position":"40% 35%"});
}, function() {
$(this).css({"background-image":"url(2.jpg)", "background-position":"10% 35%"});
}, function() {
$(this).css({"background-image":"url(3.jpg)", "background-position":"10% 35%"});
});
});
Although the name and common usages suggest that .toggle() only takes 2 functions, it actually takes 2 or more and will cycle through them.
this no longer refers to the body element, it refers to the anonymous function.
Does this code work?
var counter = 1;
$(document).ready(function() {
$('body').click(function() {
if (counter == null) {
counter = 1;
}
if (counter == 3) {
$(this).css("background-image", "url(3.jpg)");
$(this).css("background-position", "10% 35%");
counter = 1;
}
if (counter == 2) {
$(this).css("background-image", "url(2.jpg)");
$(this).css("background-position", "10% 35%");
counter = 3;
}
if (counter == 1) {
$(this).css("background-image", "url(1.jpg)");
$(this).css("background-position", "40% 35%");
counter = 2;
}
});
});
Your function uses this which is refering to itself, not the element. This would fix it:
$('body').click((function(){
var $this = $(this);
return ... {
$this // use $this instead of $(this)
Also, have a look on jQuery .toggle
Your counter declarations are strewn all over the place which makes it difficult to follow what's happening. Further, counter is declared local to the callback function, which means it loses its value every time the function executes.
Here's a simpler solution:
$(function() { // this is equivalent to $(document).ready(...)
var counter = 0;
var images = [
[ '1.jpg', '40% 35%' ],
[ '2.jpg', '10% 35%' ],
[ '3.jpg', '10% 35%' ]
];
$('body').click(function() {
$(this).css('background-image', 'url(' + images[counter][0] + ')');
$(this).css('background-position', images[counter][1]);
// increment counter, wrapping over to 0 when it reaches end of array
counter = (counter + 1) % images.length;
});
});
You can easily extend to this to any number of images by simply adding more entries to the images array.
$(document).ready(function () {
function changeBgImage() {
var imgs = [
["1.jpg", "10% 35%"],
["2.jpg", "10% 35%"],
["3.jpg", "40% 35%"]
];
var counter = 0;
return function() {
$(this).css({
"backgroundImage": "url(" + imgs[counter][0] + ")",
"backgroundPosition": imgs[counter][1]
});
counter += 1;
if (counter === imgs.length) { counter = 0; }
};
}
$('body').click(changeBgImage());
});
Update:
OK, so here we have another solution. It is basically Nick's answer but without redundancy.
$(function () {
var imgs = [["1.jpg", "10% 35%"], ["2.jpg", "10% 35%"], ["3.jpg", "40% 35%"]];
var i = 0;
$("body").click(function () {
$(this).css({"background-image": "url(" + imgs[i][0] + ")", "background-position": imgs[i][1]});
if (++i === imgs.length) { i = 0; }
});
});