I've created an animation of a pac-man opening and closing its mouth, but i would like to have it move across the screen as well. I've played around with setTimeout() and i can get it one image to go across the screen but not the actual animation. how can i do this using pure JS.
this is the HTML i have
<body>
<div id="animation">
<img id="pacManImg" src="pacMan1.png" width="50" height="50" />
<img id="pacManImg" src="pacMan2.jpg" width="50" height="50" />
</div>
<button onclick="startAnimation()"> Start</button>
</body>
i'm using this for my js
function startAnimation() {
var frames = document.getElementById("animation").children;
var frameCount = frames.length;
var i = 0;
setInterval(function () {
frames[i % frameCount].style.display = "none";
frames[++i % frameCount].style.display = "block";
}, 300);
}
Just use i to increase the left property:
setInterval(function() {
frames[i % frameCount].style.display = "none";
frames[++i % frameCount].style.display = "block";
document.getElementById("animation").style.left = i + "px";
});
Note that this requires position: absolute; in your CSS.
Related
I have an html file called index.html, and it has this div in there
<body>
<div id="rock"> <img src="rock.PNG" alt="rock" onclick="test()"> </div>
<div id="paper"> <img src="paper.PNG" alt="rock"></div>
<div id="scissors"> <img src="scissors.PNG" alt="rock"> </div>
test is my function, and its within the same file and its written here
<script type="text/javascript">
function test(){
var elem = document.getElementById("rock");
var pos = 0;
var id = setInterval(frame, 10);
function frame() {
if (pos == 350) {
clearInterval(id);
} else {
pos++;
elem.style.top = pos + 'px';
elem.style.left = pos + 'px';
}
}
}
</script>
but when my page runs I click the image, and it does not move. the image is displayed, and the onclick does work (i tested it with alert) but the image won't move... any ideas?
You need to specify the position attribute, likely relative. You could also use absolute or fixed positioning if one of those fits your needs better.
#rock, #paper, #scissors {
position: relative;
}
You need a relative position to be able to change top,bottom,left,right properties
<div id="rock" style="position: relative;">
<img src="rock.PNG" alt="rock" onclick="test()">
</div>
Have you tried change the position of the elements?
https://www.w3schools.com/css/css_positioning.asp
Ex:
<body>
<div id="rock" onclick="test()" style="position:absolute;"> <img src="teste.PNG" alt="rock" > </div>
</body>
<script type="text/javascript">
var pos = 0;
var elem = null;
var id = null;
function test() {
console.log("test");
elem = document.getElementById("rock");
id = setInterval(frame, 10);
}
function frame() {
console.log("frame");
if (pos == 350) {
clearInterval(id);
} else {
pos++;
elem.style.top = pos + 'px';
elem.style.left = pos + 'px';
}
}
</script>
I try to create a simple slider using javascipt. the problem is when counter gets to last element, It dosen't change the display to block
this is the code
<div id="slider">
<img class="slide" src="img/img13.jpg" alt=""/>
<img class="slide" src="img/img14.jpg" alt=""/>
<img class="slide" src="img/img15.jpg" alt=""/>
<img class="slide" src="img/img16.jpg" alt=""/>
<img class="slide" src="img/img17.jpg" alt=""/>
<img class="slide" src="img/img18.jpg" alt=""/>
</div>
var delay = 3000;
var i = 0;
var allSliderSlides = document.getElementsByClassName('slide');
allSliderSlides[0].style.display = "block";
setInterval(function(){
i++;
allSliderSlides[i].style.display = "block";
if(allSliderSlides[i-1].style.display=="block"){
allSliderSlides[i-1].style.display="none";
}
if(i == allSliderSlides.length-1){
i = 0;
allSliderSlides[allSliderSlides.length-1].style.display = "none";
allSliderSlides[i].style.display = "block";
}
},delay);
please give me some advice or suggestion to fix this problem
thanks
You reassigned i = 0 before your last element to become block
Try:
if(i == allSliderSlides.length-1){
allSliderSlides[allSliderSlides.length-1].style.display = "none";
allSliderSlides[i].style.display = "block";
i = 0;
}
Here's the problem:
if(i == allSliderSlides.length-1){
i = 0;
allSliderSlides[allSliderSlides.length-1].style.display = "none";
allSliderSlides[i].style.display = "block";
}
You are resetting the counter before changing the style. This results to displaying the fist image and the last image would never be displayed.
Solution: Move i = 0; to last line in the block like so:
if(i == allSliderSlides.length-1){
allSliderSlides[allSliderSlides.length-1].style.display = "none";
allSliderSlides[i].style.display = "block";
i = 0;
}
Hope that helps.
<html>
<head>
<style>
.mySlides {
display:none;
height:200px;
width:800px;
margin-left:auto;
margin-right:auto;
}
</style>
<head>
<body>
<script>
var myIndex = 0;
carousel();
function carousel() {
var i;
var x = document.getElementsByClassName("mySlides");
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
myIndex++;
if (myIndex > x.length) { myIndex = 1 }
x[myIndex - 1].style.display = "block";
setTimeout(carousel, 2000); // Change image every 2 seconds
}
</script>
<section id="images">
<img id="yeah" class="mySlides" src="image1.jpg" />
<img class="mySlides" src="image2.jpg" />
<img class="mySlides" src="image3.jpg" />
</section>
</body>
</html>
So i'm not sure why this automatic slideshow isn't working when it was copied almost verbatim from w3schools, the result doesn't display anything. Ive been trying to find out whats wrong with it for about a day and a half now and still no luck, Please Help!
I believe that this was not working because before the edit, your script tag was before your html tags..hence the script executed the function and raised a couple of errors since your html was not fully loaded...
Place your script tag below your html codes (in this scenario)
see snippet
<html>
<style>
.mySlides {
display: none;
height: 200px;
width: 800px;
margin-left: auto;
margin-right: auto;
}
</style>
<body>
<section id="images">
<img id="yeah" class="mySlides" src="https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcRxjU7k88PhMjr8f7tCmwOhiaik22dtZYY773ZtWG4TSOLgspnOeIhpOHHa" />
<img class="mySlides" src="https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcQiUk8V76AvsGFAkDEHVjnZID8iFgB8LF7mQMbVVDB8mLnxb81v1g" />
</section>
</body>
</html>
<script>
var myIndex = 0;
carousel();
function carousel() {
var i;
var x = document.getElementsByClassName("mySlides");
for (i = 0; i < x.length; i++) {
x[i].style.display = "none";
}
myIndex++;
console.log(x, myIndex);
if (myIndex > x.length) {
myIndex = 1
}
x[myIndex - 1].style.display = "block";
setTimeout(carousel, 2000); // Change image every 2 seconds
}
</script>
Here is a slightly different implementation of the slideshow that allows auto rotation of the images.
var image_number = 0;
function slideshow(num) {
var images = new Array("image1.jpg", "image2.jpg", "image3.png");
var description = new Array("Title1", "Title2", "Title3");
var image_length = images.length - 1;
image_number = image_number + num;
if (image_number > image_length) {
image_number = 0;
}
if (image_number < 0) {
image_number = image_length;
}
// Change <img> src and image description in DOM
document.getElementById("slideshow").src=images[image_number];
document.getElementById("description").innerHTML = description[image_number];
return false;
}
function auto_slideshow() {
setInterval(function(){
slideshow(1);
}, 3000);
}
I'm new to this. I am trying to create a HTML code which runs in HTML. It shows a image for 5 seconds and hides, next image is shown via button.
I found most of the codes via online. Can someone see where i am going wrong here.
<!DOCTYPE html>
<html>
<head>
<button id="next" onclick="showNext();">Show next image</button>
<div class="image" style="display: none;"><img src=“1.jpg”></div>
<div class="image" style="display: none;"><img src=“2.jpg”></div>
<div class="image" style="display: none;"><img src=“3.jpg”></div>
<script type="text/javascript">
var divs = document.querySelectorAll('div.image');
var button = document.getElementById('next'); //button.
var currentImage = 0;
function showNext() {
button.style.display = 'inline';
divs[currentImage].style.display = 'block';
setTimeout(hide, 5000);
}
function hide() {
button.style.display = 'block';
divs[currentImage].style.display = 'none';
currentImage = (currentImage + 1) % divs.length;
}
</script>
</head>
</html>
this is the JS that is used
var divs = document.querySelectorAll(‘image');
var button = document.getElementById('next');
var currentImage = 0;
function showNext() {
button.style.display = 'inline';
divs[currentImage].style.display = 'block';
setTimeout(hide, 500000);
}
function hide() {
button.style.display = 'block';
divs[currentImage].style.display = 'none';
currentImage = (currentImage + 1) % divs.length;
}
Updated
So, here is working code:
HTML
<button id="next">Show next image</button>
<div class="image" style="display: none;"><img src="http://dummyimage.com/100x100/000/fff.jpg"></div>
<div class="image" style="display: none;"><img src="http://dummyimage.com/100x100/990000/fff.jpg"></div>
<div class="image" style="display: none;"><img src="http://dummyimage.com/100x100/009900/fff.jpg"></div>
JS
var divs = document.querySelectorAll('.image');
var button = document.getElementById('next');
var currentImage = 0;
button.addEventListener('click', function(){
button.style.display = 'inline';
divs[currentImage].style.display = 'block';
setTimeout(hide, 2000);
});
function hide() {
button.style.display = 'block';
divs[currentImage].style.display = 'none';
currentImage = (currentImage + 1) % divs.length;
}
I provided jsfiddle too.
I have a simple script which works as a simple html gallery. However, I need to add some transition effects to my gallery, something like fade in, fade out, or the effect of something similar to the subtitles at the end of every movie (you know what I mean).
How can I solve this? I would like to make it using only JS, HTML, CSS, without external plugins. Is it possible? For now on, I have only something like this below:
<head>
<title>Test</title>
<script>
var images = [ "https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png",
"https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg",
"https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ee/Example-zh.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/e2/P%C5%99%C3%ADklad.jpg",
"https://upload.wikimedia.org/wikipedia/commons/d/d6/Beispiel.png"
];
var links = [ "http://www.example1.com",
"http://www.example2.com",
"http://www.example3.com",
"http://www.example4.com",
"http://www.example5.com",
"http://www.example6.com",
];
var i = 0;
var renew = setInterval(function(){
if(i==images.length) i=0;
document.getElementById("img1").src = images[i];
document.getElementById("link1").href = links[i];
if(i+1==images.length) i=-1;
document.getElementById("img2").src = images[i+1];
document.getElementById("link2").href = links[i+1];
if(i+2==images.length) i=-2;
document.getElementById("img3").src = images[i+2];
document.getElementById("link3").href = links[i+2];
i+=3;
},5000);
</script>
</head>
<body>
<div align="center">
<img src="https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png" id='img1' > </br></br>
<img src="https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" id='img2' > </br></br>
<img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png" id='img3' > </br>
</div>
</body>
I just created a JQuery function and added it to your script. Now when you click on that button it will do as it says. It is just as an example how to do that
<html>
<head>
<title>Test</title>
<script>
var images = [ "https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png",
"https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg",
"https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ee/Example-zh.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/e2/P%C5%99%C3%ADklad.jpg",
"https://upload.wikimedia.org/wikipedia/commons/d/d6/Beispiel.png"
];
var links = [ "http://www.example1.com",
"http://www.example2.com",
"http://www.example3.com",
"http://www.example4.com",
"http://www.example5.com",
"http://www.example6.com",
];
var i = 0;
var renew = setInterval(function(){
if(i==images.length) i=0;
document.getElementById("img1").src = images[i];
document.getElementById("link1").href = links[i];
if(i+1==images.length) i=-1;
document.getElementById("img2").src = images[i+1];
document.getElementById("link2").href = links[i+1];
if(i+2==images.length) i=-2;
document.getElementById("img3").src = images[i+2];
document.getElementById("link3").href = links[i+2];
i+=3;
},5000);
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script type='text/javascript'>
$(document).ready(function(){
$(".btn1").click(function(){
$("#link1").fadeOut()
});
$(".btn2").click(function(){
$("#link1").fadeIn();
});
});
</script>
</head>
<body>
</script>
</head>
<body>
<div align="center">
<button class="btn1">Fade out</button>
<button class="btn2">Fade in</button>
<img src="https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png" id='img1' > </br></br>
<img src="https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" id='img2' > </br></br>
<img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png" id='img3' > </br>
</div>
</body>
</html>
You can definitely achieve some effects with CSS. But not all (like jQuery-ui's blind)
most effects consist of changing:
opacity: [0-1]
display: relative; left: [X]px; top: [Y]px or transform: translate([X]px,[Y]px)
overflow: hidden
and an animation:
either CSS:
#img {
animation: fade-in 2s infinite;
}
#keyframe fade-in {
from {
left: -200px
}
to {
left: 0
}
}`
or JavaScript:
var img = document.getElementById('img');
for(i = 1; i <= 100; i++){
(function(step) {
setTimeout(function() {
img.style.transform = "translate(-"+(200-step*2)+"px, 0)";
}, step * 20);
})(i);
}
to achieve something like blind, you must move an image-container <div> left, while moving the image right at the same speed.
Here's a simplified blind effect example
https://jsfiddle.net/warkentien2/Lh10phuv/5/
Here I've implemented 8 pure JavaScript effects (including blind, with instructions)
- fade in
http://codepen.io/warkentien2/pen/pboVXR
- fade out
http://codepen.io/warkentien2/pen/EyxpVq
You can try this one. I have not changed your code at all.
HTML
<div align="center">
<a href="http://www.example1.com" id="link1">
<img src="https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png" id='img1' >
</a>
</br>
</br>
<a href="http://www.example2.com" id="link2">
<img src="https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" id='img2' >
</a>
<br>
<br>
<a href="http://www.example3.com" id="link3">
<img src="https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png" id='img3'>
</a>
<br>
</div>
Css
<style>
.animate{transition:all 1s ease; opacity:0;}
</style>
Js
<script>
var images = [ "https://upload.wikimedia.org/wikipedia/commons/7/70/Example.png",
"https://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg",
"https://upload.wikimedia.org/wikipedia/commons/c/ce/Example_image.png",
"https://upload.wikimedia.org/wikipedia/commons/e/ee/Example-zh.jpg",
"https://upload.wikimedia.org/wikipedia/commons/e/e2/P%C5%99%C3%ADklad.jpg",
"https://upload.wikimedia.org/wikipedia/commons/d/d6/Beispiel.png"
];
var links = [ "http://www.example1.com",
"http://www.example2.com",
"http://www.example3.com",
"http://www.example4.com",
"http://www.example5.com",
"http://www.example6.com",
];
var i = 0;
var renew = setInterval(function(){
if(i==images.length) i=0;
document.getElementById("img1").src = images[i];
document.getElementById("link1").href = links[i];
document.getElementById('link1').style.opacity = 0;
setTimeout(function(){
document.getElementById('link1').setAttribute("class", "animate");
document.getElementsByClassName('animate')[0].style.opacity = 1;
setTimeout(function(){document.getElementById('link1').removeAttribute("class", "animate")},500)
},500)
if(i+1==images.length) i=-1;
document.getElementById("img2").src = images[i+1];
document.getElementById("link2").href = links[i+1];
document.getElementById('link2').style.opacity = 0;
setTimeout(function(){
document.getElementById('link2').setAttribute("class", "animate");
document.getElementsByClassName('animate')[1].style.opacity = 1;
setTimeout(function(){document.getElementById('link2').removeAttribute("class", "animate")},500)
},500)
if(i+2==images.length) i=-2;
document.getElementById("img3").src = images[i+2];
document.getElementById("link3").href = links[i+2];
document.getElementById('link3').style.opacity = 0;
setTimeout(function(){
document.getElementById('link3').setAttribute("class", "animate");
document.getElementsByClassName('animate')[2].style.opacity = 1;
setTimeout(function(){document.getElementById('link3').removeAttribute("class", "animate")},500)
},500)
i+=3;
},5000);
</script>
Check live example here - https://jsfiddle.net/Rit_Design/9mkvffnk/1/
Remember the code can be much more smarter.