Question:
If you are using
<img>
in html, how would you style that element in css to make a large image fit the browser window with no white space?
Situation:
I am working on a project that has me a bit stumped. The idea is a slideshow for the webpage background. In the .html file I have created the slideshow with javascript. The single image element is what javascript uses to shuffle through the five images that will be there. (I am just using one for now to get sizing right.)
My slideshow works but my image is huge and does not perfectly fit the browser window. :( This tells me that my other images will have the same problem when I plug them into the javascript array. (they are all quite large)
I am thinking that I may have to use a div container but I am not sure how. I'm the new guy.
Here is my javascript with for the slidesow:
<script type="text/javascript">
var images = [
"",
"",
"",
"",
"Raptor sand.jpg"
];
</script>
<div class="container">
<img src="Africa Twin Mountainside.jpg" id="slide" alt=""/>
</div>
<script>
var step = 0;
function slideit(){
document.getElementById('slide').src = images[step];
step++;
if(step>=images.length)
step=0;
setTimeout("slideit()", 2500);
}
slideit();
</script>
and here is my css
.container{
width: 100%;
height: 100%;
object-fit: contain;
}
<div style="background-image: url('http://placekitten.com/1200/800'); background-size: cover; position: fixed; top: 0; right: 0; bottom: 0; left:0"></div>
(inline styles because I'm being lazy. Obviously these should live in a stylesheet).
sub out url for correct image.
You can use jQuery to do this
<img src="picture.jpg" alt="My picture" id="target">
<script src="./jquery-3.1.0.js"></script>
<script>
$(document).ready(function() {
$( "#target" ).height( $( window ).height() );
$( "#target" ).width( $( window ).width() );
});
</script>
Related
I am getting a preload box for a img tag from the code below.
<script>
document.addEventListener('DOMContentLoaded', function(){
load()
}, false);
function grab(){
var urlsource = document.getElementById("image").value="";
return urlsource.length > 0;
}
function load(){
var imgurl = document.getElementById("image").value;
document.getElementById("replace").src=imgurl;
return imgurl.length > 0;
}
</script>
<style>
div.output {
height: 200px;
width: 200px; }
img#replace {
display: none;
}
img#replace[src]{
height: 150px;
width: 150px;
position: absolute;
display: inline-block;
}
</style>
</head>
<body>
<textarea id="image" onload="grab();" onkeyUp="load();" onkeyPress="load();"></textarea><br>
<a id="demo1" href="https://www.google.co.nz/">
<div class="output">
<img id="replace"/>
</div>
</a>
</body>
How the preload image can be removed while keeping the DOMContentloaded event? Thanks very much!
Every <img/> must have a src. If it does not, it's treated as broken.
Give it a src, even if that means creating a 1x1 transparent GIF pixel.
<img id="replace" src="data:image/gif;base64,R0lGODlhAQABAIAAAP///////yH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" />
EDIT: On closer inspection, it seems that your code is immediately running when the document has loaded, with the code effectively reading:
image.src = ""; // because the textarea is empty
Of course, this is not a valid image, but it is still an image, so it appears as a broken one. You may want to add an onerror event to the image to hide it if it fails to load.
<img id="replace" onerror="this.removeAttribute('src');" />
(This should work because of your CSS hiding source-less images)
I've been trying - and I'm at the point where I just don't know what to try anymore.
I'm trying to make my website's chat fill the entire page with this script
<script>
$(document).ready(function() {
function setHeight() {
windowHeight = $(window).innerHeight();
$('ul').css('min-height', windowHeight);
};
setHeight();
$(window).resize(function() {
setHeight();
});
});
</script>
I'm using this script for my chat's ul tag, and it fits the height so the script works, but I'm trying to figure out how to make it fill about 95% of the page, so I still have room for the content below. (Send message, settings and emotes.)
I have a div tag around the entire chat, but setting that in the script doesn't affect the list of messages.
Any ideas to my struggle?
dont bother with js/jquery, use css, pure css like this :
div {
position: fixed!important;
position: absolute;
top: 0;
right: 0;
bottom: 0;
left: 0;
}
<div id="container">
...
</div>
<script>
var container=document.getElementById('container');
var h=document.documentElement.clientHeight;
container.style.height=h+'px';
</script>
I'm trying to add an image over some text that I have. This is similar to retailmenot.com's reveal coupon code. When a user clicks on the image the image is removed and reveals the text underneath while simultaneously linking the user to an external url.
The base layer can be as follows:
<div class="base">
<h3>Some text</h3>
</div>
I want to load an image with the following over it when the text is clicked:
<div class="overlay">
<img src="http://example.com/image.jpg"/>
</div>
The height of the base layer with class "base" is variable, so the image has to be resized to fit it. I have a working example where I place the image and then resize it, but this creates issues when javascript may not be enabled as the image fails to be resized and looks messy. I want the script to fall back to just showing the underlying text if javascript is disabled.
How can I add and automatically resize such an overlay on page load using jquery or javascript?
You can do it like this:
$(document).ready(function () {
//Set overlay position and dimension to same as base
$base = $(".base");
$overlay = $(".overlay");
$overlay.offset($base.offset());
$overlay.height($base.outerHeight());
$overlay.width($base.outerWidth());
$overlay.show();
//Hide overlay on click (show hidden text)
$(".overlay").click(function () {
$(this).fadeOut();
});
});
and with css:
.overlay{
/* Hide overlay if no js */
position: absolute;
display: none;
}
Check it out here: JSFiddle
If you can have the overlay in the base, as such:
<div class="base">
<h3>Some text</h3>
<div class="overlay">
<img src="http://example.com/image.jpg"/>
</div>
</div>
You can css this, no need for javascript:
.base{
position: relateive;
}
.overlay{
position: absolute; /* or fixed if scrollbars involved */
display: none;
left: 0;
right: 0;
top: 0;
bottom: 0;
/* or replace right and bottom with: */
/* width: 100%;
height: 100%; */
}
You can now use javascript to toggle visibility:
$('.overlay').fadeIn();
Let your html page has this following code
<div class="base">
</div>
Don't place any code about your image in html page. And then in your jQuery code.
var img = '<img src="http://example.com/image.jpg"/>';
var txt = 'Some text';
$(document).ready(function(){
$(this).find('.base').html(txt).show();
$(this).find('.base').click(function(){
if($(this).html() == img)
$(this).html(txt).show();
else
$(this).html(img).show();
});
});
This will solve your issue.
I've got a bunch of images, on click I want the images to turn white emulating some kind of fade effect. So you click it and for 1 second it fades from the original image to just white. I also need it to turn back to the original image when the user clicks something else.
Is this possible with JavaScript? - If so what should I be looking at (I'm really bad with graphics).
I've had a go at trying this with opacity but I don't want the background to be visible behind the image
Psuedo-element Solution
You could use a wrapper with a pseudo-element to overlay what you're looking for -- and the animations are handled by a toggled CSS class (which is ideal for performance).
CodePen Demonstration
HTML
<div class="whiteclicker">
<img src="http://lorempixel.com/400/200" alt=""/>
</div>
SCSS
#import "compass/css3/transition";
body { background: gainsboro; text-align: center; }
.whiteclicker {
display: inline-block;
position: relative;
&::after {
content: "";
display: block;
position: absolute;
top:0; left:0; right:0; bottom:0;
background: white;
opacity: 0;
#include transition(opacity 1s ease);
}
&.active::after {
opacity: 1;
}
}
JS
$('.whiteclicker').click(function(){
$(this).toggleClass('active');
});
To ameliorate the Spencer Wieczorek solution (the way two seems to be the best solution on my opinion) :
What about creating the white div on the fly (and fade it in and out) instead of put it in the html code ?
See the fiddle.
$("#myImage").click(function(){
$(this)
.parent().css({position:'relative'}).end()
.after($('<div>')
.hide()
.css({position:'absolute'
, top: $(this).position().top
, left: $(this).position().left
, width: $(this).width()
, height: $(this).height()
, background: '#FFF'
})
.fadeIn('fast')
.on({
click : function(e){
$(this).fadeOut('fast', function(){ $(this).remove();});
}
})
);
});
Then, you don't have anything to add to the html code or in the css styles, Jquery does everything.
#Spencer Wieczorek : I did my own answer, because I did not agree with your way of designing the css style (the fixed position is really not good, especially if the page is scrolled for example...). Mine is more ... standalone-y ;)
You might want to try having two images stacked on each other.
See this:
<script type="text/javascript">
var image1 = '<img class="images" src="Image 1" onClick="switch();" />';
var image2 = '<img class="images" src="Image 2" onClick="switch();" />';
var currentImage = 1;
function switch(){
if(currentImage==1){
currentImage++;
document.getElementById("image").innerHTML = image2;
}
if(currentImage==2){
currentImage--;
document.getElementById("image").innerHTML = image1;
}
}
</script>
<style>
.images{ position:fixed; top: 0; left: 0; }
</style>
<img class="images" src="Black image" />
<div id="image"><img class="images" src="Image 1" onClick="switch();" /></div>
For the fade I'm just gonna see how you could do it.
EDIT:
<script type="text/javascript">
var fadecount = 100;
function fade() {
document.getElementById("imageToFade").style.opacity = fadecount;
fadecount--;
if(fadecount==0){
clearTimeout(fade);
}
}
function start_fade(){
var fade = setTimeout(fade(), 10);
}
</script>
With Base 64 you can just have the binary version of the picture and then an all white picture and based on the .click you reassign the src to the white base64...
document.getElementById("img").src = "data:image/png;base64, iVBORw0KGgoAAAANSUhEUgAAAAUA
AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO
9TXL0Y4OHwAAAABJRU5ErkJggg=="
just change to the all white version after the click, technically js driven from click event, and doesn't involve two different elements existing just at different layers...
How can I fade one image into another with jquery? As far as I can tell you would use fadeOut, change the source with attr() and then fadeIn again. But this doesn't seem to work in order. I don't want to use a plugin because I expect to add quite a few alterations.
Thanks.
In the simplest case, you'll need to use a callback on the call to fadeOut().
Assuming an image tag already on the page:
<img id="image" src="http://sstatic.net/so/img/logo.png" />
You pass a function as the callback argument to fadeOut() that resets the src attribute and then fades back using fadeIn():
$("#image").fadeOut(function() {
$(this).load(function() { $(this).fadeIn(); });
$(this).attr("src", "http://sstatic.net/su/img/logo.png");
});
For animations in jQuery, callbacks are executed after the animation completes. This gives you the ability to chain animations sequentially. Note the call to load(). This makes sure the image is loaded before fading back in (Thanks to Y. Shoham).
Here's a working example
$("#main_image").fadeOut("slow",function(){
$("#main_image").load(function () { //avoiding blinking, wait until loaded
$("#main_image").fadeIn();
});
$("#main_image").attr("src","...");
});
Well, you can place the next image behind the current one, and fadeOut the current one so that it looks like as though it is fading into the next image.
When fading is done, you swap back the images. So roughly:
<style type="text/css">
.swappers{
position:absolute;
width:500px;
height:500px;
}
#currentimg{
z-index:999;
}
</style>
<div>
<img src="" alt="" id="currentimg" class="swappers">
<img src="" alt="" id="nextimg" class="swappers">
</div>
<script type="text/javascript">
function swap(newimg){
$('#nextimg').attr('src',newimg);
$('#currentimg').fadeOut(
'normal',
function(){
$(this).attr('src', $('#nextimg').attr('src')).fadeIn();
}
);
}
</script>
Are you sure you're using the callback you pass into fadeOut to change the source attr and then calling fadeIn? You can't call fadeOut, attr() and fadeIn sequentially. You must wait for fadeOut to complete...
Old question but I thought I'd throw in an answer. I use this for the large header image on a homepage. Works well by manipulating the z-index for the current and next images, shows the next image right under the current one, then fades the current one out.
CSS:
#jumbo-image-wrapper
{
width: 100%;
height: 650px;
position: relative;
}
.jumbo-image
{
width: 100%;
height: 100%;
position: absolute;
top: 0px;
left: 0px;
}
HTML:
<div id="jumbo-image-wrapper">
<div class="jumbo-image" style="background-image: url('img/your-image.jpg');">
</div>
<div class="jumbo-image" style="background-image: url('img/your-image-2'); display: none;">
</div>
</div>
Javascript (jQuery):
function jumboScroll()
{
var num_images = $("#jumbo-image-wrapper").children(".jumbo-image").length;
var next_index = jumbo_index+1;
if (next_index == num_images)
{
next_index = 0;
}
$("#jumbo-image-wrapper").children(".jumbo-image").eq(jumbo_index).css("z-index", "10");
$("#jumbo-image-wrapper").children(".jumbo-image").eq(next_index).css("z-index", "9");
$("#jumbo-image-wrapper").children(".jumbo-image").eq(next_index).show();
$("#jumbo-image-wrapper").children(".jumbo-image").eq(jumbo_index).fadeOut("slow");
jumbo_index = next_index;
setTimeout(function(){
jumboScroll();
}, 7000);
}
It will work no matter how many "slides" with class .jumbo-image are in the #jumbo-image-wrapper div.
For those who want the image to scale according to width percentage (which scale according to your browser width), obviously you don't want to set height and width in PIXEL in CSS.
This is not the best way, but I don't want to use any of the JS plugin.
So what can you do is:
Create one same size transparent PNG and put an ID to it as
second-banner
Name your original image as first-banner
Put both of them under a DIV
Here is the CSS structure for your reference:
.design-banner {
position: relative;
width: 100%;
#first-banner {
position: absolute;
width: 100%;
}
#second-banner {
position: relative;
width: 100%;
}
}
Then, you can safely fade out your original banner without the content which placed after your image moving and blinking up and down