Add image over text using jquery - javascript

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.

Related

Render google map with full screen on initialize

So I have been working with Google maps for quite some time now but I am stuck at a point. I have a container div in which I am rendering my map but initially its display is none. I have a floating button and I want that on its click the container's display should change to block and it should trigger the fullscreen event so the map is displayed in full screen. So far I have done this:
// html for map
<div id="searchMap" class="search-map">
<div class="embed-responsive">
<div id="searchViewMap" style="height: 540px;"></div>
<div id="restaurant-label" class="restaurant-info-container-search"></div>
</div>
</div>
initially div with id="searchMap" has display: none
// html for button to show the map
<img src="{{asset('/images/map_button.png')}}" class="content-section__map-button" onclick="showMobileMap()">
That is an image button.
// JavaScript method onclick of the button
function showMobileMap() {
$('#searchMap').css('display', 'block');
$('#searchViewMap div.gm-style button[title="Toggle fullscreen view"]').trigger('click');
}
Now the problem that I am facing is that when I click the button for the first time it displays the container with the map but it doesn't make it full screen. And when I click the button again it makes it full screen. I don't know why this is happening but I want that the map renders full screen on the first click.
try to change :
<div id="searchViewMap" style="height: 540px;"></div>
to
<div id="searchViewMap" style="width: 100%; min-height: 100vh;"></div>
or add css :
#searchMap {
height: 100%;
width: 100%;
left: 0;
position: absolute;
top: 0;
z-index: 2;
}

Have bright text over a darkened image

I have the following CSS component:
<div className="dimmed-image" style={itemStyle}>
<div className="bright-text">
<br/>
<h2 className="white-center">Some text</h2>
</div>
</div>
The itemStyle variable references a background image.
var itemStyle = {
backgroundImage: 'url(' + imageLocation + ')'
};
The css classes are these:
.dimmed-image {
-webkit-filter: brightness(60%);
}
.bright-text {
-webkit-filter: brightness(100%) !important;
}
I want to have white text over an image which is darkened.
However, if I use the code above, the text will also be darkened.
If I make two separate div classes like this:
<div className="dimmed-image" style={itemStyle}>
</div>
<div className="bright-text">
<br/>
<h2 className="white-center">Some text</h2>
</div>
Then the text will be placed beneath the image.
How can I have bright text on top of a darkened image?
To make the text jump back to the top of the image just apply position: absolute to the .dimmed-image:
.dimmed-image {
...
position: absolute;
}
This will take the image outside the normal rendering and as long as you don't specify any other location will make it stay at the same place. Meanwhile the elements below (e.g. the text) will ignore the image and be rendered starting from the same point where the image starts.
Place the dimmed image and the text in separate divs and wrap them together in a container div.
Give the container div the same width and height as the one containing the image. Do the same to the bright-text div as well. Use position to place your text above the image.
That is the best approach.
Also className is invalid. Use class instead.
HTML:
<div class="dimmed-image-wrapper">
<div class="dimmed-image" style={itemStyle}>
</div>
<div class="bright-text">
<br/>
<h2 class="white-center">Some text</h2>
</div>
</div>
CSS
.dimmed-image {
-webkit-filter: brightness(60%);
}
.dimmed-image-wrapper {
position: relative;
width: [same-as-dimmed-image]px;
height: [same-as-dimmed-image]px;
}
.bright-text {
position: absolute;
left: 0;
top: 0;
width: [same-as-dimmed-image]px;
height: [same-as-dimmed-image]px;
}
Inside the .bright-text div you can also use position, left and top css rules to move around your text, if you wish.

JavaScript - Make an image turn white on click

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...

Image Slider with "Responsive Width", "Fixed Height", "Center Aligned" and "Auto Rotate"

I need a full width (responsive) slider with fixed height and centered image ( the min width is 960px and people with a wider screens will see the rest of the image (the extra on the left and right)) and it needs to auto-rotate.
Now I got the html/css worked out, but my javascript is rubbish so i have no idea how to let the images slide. I've checked out a lot of Questions here but nothing seems to work. My image dimensions are 2300x350.
CSS:
body {
margin: 0 auto;
}
#slider_container {
width:100%;
height:350px;
overflow:hidden;
position: relative;
z-index: 1;
}
.image {
position:relative;
float:left;
height: 350px;
width: 100%;
overflow: hidden;
}
.image img {
position:absolute;
left:50%;
top:50%;
margin-left:-1150px;
margin-top:-175px;
}
HTML:
<div id="slider_container">
<div class="image">
<img src="images/header.jpg" />
</div>
<div class="image">
<img src="images/header2.jpg"/>
</div>
<div class="image">
<img src="images/header3.jpg" />
</div>
</div>
With this code the pictures come out nice in the middle on every screen but
how do I let it slide and autorotate? I guess the first image just needs to be replaced by the second so a z-index change? or + or - the width of one picture?
You need to only style the img tag if using flexslider. Try the fiddle link below. I have included four files for this.
jQuery 1.9.1
flexslider.css
jquery.flexslider-min.js
bg_direction_nav.png
jsfiddle
Please check this... http://www.jqueryscript.net/demo/Responsive-jQuery-Full-Width-Image-Slider-Plugin-responsiveSlides/ it is full width and fixed height slider and auto rotate. Here you have options to styling according to your needs
$(function(){
var p=$('#content').responsiveSlides({
height:450, // slides conteiner height
background:'#fff', // background color and color of overlayer to fadeout on init
autoStart:true, // boolean autostart
startDelay:0, // start whit delay
effectInterval:5000, // time to swap photo
effectTransition:1000, // time effect
pagination:[
{
active:true, // activate pagination
inner:true, // pagination inside or aouside slides conteiner
position:'B_R', /*
pagination align:
T_L = top left
T_C = top center
T_R = top right
B_L = bottom left
B_C = bottom center
B_R = bottom right
*/
margin:10, // pagination margin
dotStyle:'', // dot pagination class style
dotStyleHover:'', // dot pagination class hover style
dotStyleDisable:'' // dot pagination class disable style
}
]
});
});
For more modification please see jquery.responsiveSlides.js

content of fixed div changes as other divs scroll past it

I'm trying to fix a div at the top of a layout that will contain a blog post's information (date posted, # of notes, permalink, etc.) and change this information as you scroll down past posts. I'm not sure if it would require any kind of javascript or just some intricate positioning using css. Here's how I would layout the posts. How can I get the specific post information from each post to change within that fixed div as the posts scroll past it?
#container {
width: 960px;
margin: 0px auto;
}
#changingpostinformation {
position: fixed;
margin: 0px auto;
}
<div id="container">
<div id="changingpostinformation">fixed post information div that's information changes as each post below reaches the top of #container</div>
<div class="post">
<h3>Post Title>
<p>This is the body of this example post.</p>
</div>
<div class="post">
<h3>Post Title>
<p>This is the body of this example post.</p>
</div>
</div>
Like #ShankarSangoli says, you should add top: 0;, and also left: 0; to #changingpostinformation (or other values to position it however you like)
You'll need some javascript to find out which post appears first on the page and show its info.
$(function() {
$(window).bind('load resize scroll', function() {
var doctop = $('body').scrollTop();
// loop over all posts, from top to bottom
$('.post').each(function() {
if ($(this).position().top > doctop) {
put_postinfo_in_fixed_div($(this));
return false; // breaks from the loop
}
});
});
});
This function runs once when page is loaded, and also when the window is resized or scrolled.
You need to implement put_postinfo_in_fixed_div() which gets an post div, and does what it says.
Use this CSS:
#changingpostinformation {
position: fixed;
top: 0px;
}

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