I am currently using jQuery Mobile for a Phonegap application and I was wondering how could I add a black overlay that is semi transparent over only the content of a page. I don't want it to cover the top and bottom navbars. This would happen while I place an AJAX call to the server.
This effect is similar to the Twitter iOS app, when you are typing in the search bar.
$('#search').ajaxStart(function() {
// what do I put here?
});
Thank you for your help everyone! Much appreciated.
I agree with meagar (who should make his comment an answer so it can be accepted!) but would also add that if you don't want the overlay div to always be present (but just hidden), you can add it on the fly instead:
$('#search').ajaxStart(function() {
$('#content').wrap('<div class="overlay" />');
});
(#content represents whatever you happen to call your content wrapper and .overlay is the name I happened to choose for mine; easily changed!)
Whenever the Ajax complete callback fires (which will also be where the .hide() would be used in meagar's suggestion), just unwrap it again with this:
$('#content').unwrap();
The rest is CSS.
.overlay {
position: relative;
height: 100%;
width: 100%;
background-color: rgba(0,0,0,0.7);
}
Keep in mind... this may not in fact be the right CSS approach, depending on what's already on your page. The basic idea is that you want it to span just your content area, but there are traps! Floats, absolute positioning of some things... all conspire to make your overlay not cover only the content area. If you run into that trouble, it's a separate SO question though. ;-)
JSFiddle: http://jsfiddle.net/Ff5wV/
Related
Thanks for any help you can offer me/point me in the write direction.
I am not sure how to explain what is happening.
I current have a page with an image background (the image is 4044,2160 so it is larger than you would view on a single screen (normally)).
Currently when the page loads, the image is top-centered and is not on repeat and thus fills the background completely.
However when inserting html code (CRUD) via javascript, etc. with the resulting page becoming larger than the original in the y direction, the background stops and does not fill the space below.
http://postimg.org/image/jqzx0vuzr/
I am not sure what to do to fix it and most likely think it is a css problem.
Below is code:
HTML
<section id="index" class="index clinic">
<div id="x_container">
Javascript insertion of code
</div>
</section>
CSS
.clinic{
width:100%;
position:relative;
background: url(../img/clinic.jpg) no-repeat top center;
}
.index{
height: 100%;
padding: 0;
}
#index.index {
padding:15% 0 0 0;
}
#xcrud_container{
width: 90%;
margin: 0 auto;
}
It seems that the javascript does not matter as to what is inserted, (have tried lorem ipsum, etc.)
But just to expand on what is inserted, the size of the x_container changes based on a state and this is altered by javascript. (Thus page is not reloaded and background size recalculated)
I have currently tried a clearfix solution (but to no avail) as well as attempting repeat-y on the background image.
Lastly I have attempted to manually create the page through directly saving the html code (i.e. it is not inserted by anything and is apart of the html code of the page) to the page and attempting to see if the background expands. It does not. The background fills the initial view area, however as soon as you scroll down the page, the white area reappears.
Just to make sure this is known the background image is larger than area viewed, thus the white area should not be present.
Any help would be greatly appreciated, as I have been at this for a few days...
Thanks
Change % to Pixels as for example.
.index{
height:1000px;
padding: 0;
}
Thanks for you help guys,
Through the comments and answer I have been able to figure out my own stupidity in trying to force a tag to define the background of the page rather than using body. i.e. .
The reason for my defining it as a section tag is due to its use on previous pages where the was followed by another section and thus the white space area would not be a problem. (Also is the reasoning for the height:100%;, as I had to define the height of the section as being 100% in order to fully create the image within the section.
Thanks again.
Consider this page: http://www.collegeanswerz.com/adelphi-university/academics/professors/do-professors-explain-things-clearly-are-professors-interesting.
The element in question is "Do they make things easy to understand? Are they interesting?" in the light gray box on the top right. When the page loads, it starts off high up, and then it moves 30px down. The same thing happens when you click "Information" in the navbar.
This is the element: <div id="question_sub" class="well"></div>.
Why does this happen, and how can I fix it?
Answer to Why does it Happen
If you try loading your page without javascript the page looks like
Problem
Your page is very heavily dependent on js for dom elements modification and for styling also.
Solution To avoid this style your page in css as maximum as possible, JS should be used for interaction or making web page attractive.
Probable Problem
If you are loading lots of external script which are not related to page content like discus inside head element
Solution
Move all the external js from head to end of body if you are not doing it, or you can load them asynchronously. Refer Mozilla Synch and Async
Another Way
If you want content to be loaded from server only when some portion of it has changed then use application cache technique with this the pages will be loaded from client machine so only initial page load will take time for the first load and then it will be quite fast
Check Using Application Cache
Other Ways
Compress Javascript and CSS
Use gzip compression
there are lot of more stuff, search it you will find ocean of knowledge, reference
If you want to keep the 50px margin between the elements then change the navbar class to also be 50px
.navbar {
margin-bottom: 50px;
}
Currently it is set at 20px;
Remove this code :-
comments powered by <span class="logo-disqus">Disqus</span>
This is a problem about fusion-margin
Remove this:
#college_pages_css .questions {
margin-top: 30px;
And try this, it will work fine:
#college_pages_css .questions {
margin-top: 0;
If you want a margin, put the margin on div#normal ;)
It looks like you're having a CSS issue due to the floating elements.
try floating the nav on the left:
#normal > nav {
float: left;
}
.disqus { float: right }
and wrap the following elements in a div that is floated to the right, for exemple:
<div class="disqus">
<div id="question_sub" class="well">Do they make things easy to understand? Are they interesting?</div>
<p class="stratify" style="display: block;">tip: talk about the best/worst/average cases</p>
<div id="disqus_thread">
</div>
I want to use a div as a background for a website.
If I use position:fixed and set the width & size to the viewport size the design breaks on mobile devices/tablets as they do not support the fixed position.
What's the best way to set a div as a static background, so that it works on mobile devices too?
I'm not entirely sure how you intend to use the background, but I created a loose way to do this here. The tacky background is applied to a div the size of the screen, and it will not move (as long as you're careful with what you put inside it). However, the same effect could be done just by direct styles on the body - I'm not sure what exactly you need the div for, so I can't guarantee this technique will work for your use case.
How it Works
With disclaimers out of the way, here are a few details on how it works. All content will have to appear within two divs: one outer one that has the background, and an inner one to hold all of the content. The outer one is set to the size of the page and can have the background applied to it. The inner one then is set to the size of the parent, and all overflow is set to scroll. Since the outer one has no scrollbar, any interior content that exceeds the size of the background tag will cause a scrollbar to appear as though it were on the whole page, not just on a section of it. In effect, this then recreates what the body is on the average web page within the "content" div.
If you have any specific question on the styles, let me know and I'll flesh out the mechanics in more detail.
With jQuery
I suppose there's still one remaining option: use similar style rules, but absent the ability to nest everything within the background, instead prepend it, and change it's position whenever the user scrolls, like so.
Then, just inject this code:
<style>
#bg {
width: 100%;
height: 100%;
position: absolute;
top: 0px;
background-image: url(http://cdn6.staztic.com/cdn/logos/comsanzenpattern-2.png:w48h48);
margin: 0px;
padding: 0px;
overflow: hidden;
}
</style>
<script>
$("body").prepend("<div id='bg'></div>");
$(document).on("scroll", function () {
$("#bg").css("top", $(document).scrollTop())
.css("left", $(document).scrollLeft());
});
</script>
modifying the style rules for the background div accordingly, and you should be good. It will not have a good framerate since this will always appear after the scroll paint, but you're running low on options if you have so little control over the rest of the document structure and style.
You don't have to use jquery. I was able to get this effect with just CSS.
You set the div just below the initial tag. Then apply the image to the html within the div. Give the div and id attribute as well (#background_wrap in this case).
...I tried this without applying the actual image link within the html and it never worked properly because you still have to use "background-image:" attribute when applying the image to the background within css. The trick to getting this to work on the mobile device is not using any background image settings. These values were specific for my project but it worked perfectly for my fixed background image to remain centered and responsive for mobile as well as larger computer viewports. Might have to tweak the values a bit for your specific project, but its worth a try! I hope this helps.
<body>
<div id="background_wrap"><img src="~/images/yourimage.png"/></div>
</body>
Then apply these settings in the CSS.
#background_wrap {
margin-left: auto;
margin-right: auto;
}
#background_wrap img {
z-index: -1;
position: fixed;
padding-top: 4.7em;
padding-left: 10%;
width: 90%;
}
I am trying to relocate a div - the expandable panel with the header 'Why Bother', so it appears where you see it now in the display (at the bottom). But in the HTML, I want it to appear at the top of the 8 panels.
(These panels are located all down the RH side of the content area. And I am doing this to retain the current sites SEO, which is where the guy who I am building this for makes 99% of his money).
http://dev.assessmentday.co.uk/index.htm
I have tried using bottom:0; but this will not work with the expandable panels. Is there a way to do this using CSS or JS?
If you you want it to appear at the top for SEO reasons, then you are going to have to move it to the top in your HTML code. Moving it after the DOM loads (with either JS or CSS) will have no effect on it's SEO, as the SEO spiders will read the DOM the way it appears in the original HTML.
Once you have moved it to the top, you can then move it to the bottom using javascript, so that it appears to be at the bottom.
Assuming it is the first div element in <div class="contentLeft" with the class dropdownPanel , You could use the following jQuery:
$(document).ready(function(){
$('div.dropdownPanel:first').appendTo('#content div.contentLeft');
});
Here is a working example:
http://jsbin.com/ezizix/1/edit
I noticed on your site you have the $ shortcut for jQuery disabled, so be sure to replace it with jQuery:
jQuery('div.dropdownPanel:first').appendTo('#content div.contentLeft');
You can achieve what you want with absolute positioning. I don't know if the dropdowns will work after this, but it is worth a try.
Add this to the existing contentLeft css rules
.contentLeft {
padding-bottom: 90px;
position: relative;
}
Add this to the "special" div
.specialdropdownPanel {
bottom: 20px;
position: absolute;
}
Use jQuery before to do this Example on fiddle
$(".contentLeft .dropdownPanel").eq(0).before($(".contentLeft .dropdownPanel").eq(7));
My question has three parts
Part 1: To show an animated image caption for a image (this part is done as in the example row one http://jsfiddle.net/JBnbG/32/ )
Part 2: Show center part of youtube hqdefault.jpg thumbnail image in a div of 150x150 dimension (This part is also done as second row in the example)
Part 3: I want to integrate the part 1 & part 2 features in to part 3. problem is that caption works but the image is not alined in center as show in second row of the example.
Example is in http://jsfiddle.net/JBnbG/32/
I cant change structure otherwise it wont work caption part work properly
I would appreciate if some can help to fix the issue with keeping the HTML structure intact
I guess my question is, are you loading the example html dynamically from youtube, or just the images?
If the html is yours, it's a simple styling adjustment.
I forked it on jsfiddle , I think this is what you mean.
Not quite sure what happened to the styling, but I set the image
id="ContentPlaceHolder1_rptVideos_imgVideo_1" style="height:auto; width:200px;margin-left:-25px;"
or, another way is:
left:-25px; position:relative;
Which btw, all these styles should be declared as a class in you stylesheet.
If you're loading the html dynamically, I commented out the javascript that achieves the same thing.
Depending on what you're working with, if using php, you might want to get a script that will auto crop to the appropriate size. Timthumb.php is the most notable one, although there's a security issue that will never be fully bulletproof, although pretty solid as is.
Cheers!
Check this working code: http://jsfiddle.net/surendraVsingh/JBnbG/39/
Changes to be done in CSS:
.VideoContainer > span {
display: block;
}
.VideoContainer > span > img {
display: inline-block;
margin-left: -60px;
margin-top: -25px;
}