I have been learning css & jquery.
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
#box
{
border-style:solid;
border-color:red;
height: 80px;
width: 180px;
}
</style>
</head>
<body>
<div id="box">Demo Box</div>
</body>
</html>
what i am trying to achieve is the border color should appear from left top and flow to create a box border around the division. it seems impossible just want to know expert guidance if this could be done.
*Edit MobyD thanks " like a tron bike "
Assuming you want an animation around the box, it could be arranged by animating a sequence of lines, each animation triggering the next, as it finishes.
addLine1();
line1.animate({ width: width-of-box }, duration, function() {
addLine2();
line2.animate({ height: height-of-box }, duration, ... );
});
Each line would have to be positioned at its appropriate corner.
Demo
A neater recursive solution could probably be built, but it's something along these lines that you'd have to go with. The border property itself cannot be animated in this manner.
Assuming you want a gradient border or what do you mean by flow?
Yes it can be done.
Example 2px gradient border:
Simply create a div positioned relative which has a gradient background in your colors
Then create a child div positioned absolutely in there with a widht and height slightly smaller
and you're ready.
see http://jsfiddle.net/njL3H/
Related
I'm creating a CV page, where I included animations - some of them work with additional library: Animate css. It works, but animations start when page is fully loaded - and I want them to happen when scrolled to position where div starts (It's in the middle of page)
I've tried to do that with element .scrollTop, but then I could include value only in px - and i need responsive page ( I use calc() )
There was also possibility that i did something wrong - but i haven't noticed
Just like I said - I want to start animations when div would become in range of sight.
This is possbile, if you combine JQuery with JavaScript DOM or with just JavaScript DOM.
My function might not be the best way, but it works and is fairly simple.
My example starts an Animation when the grey divs Top offset relative to the viewport is lower than 100.
(If you would like to use this make 2 css classes (1 with an animation, 1 without) and set the ID Strings to your HTML Ids)
.Initial{
background-color: #ccc;
color: black;
position: fixed;
}
.AfterScroll{
background-color: #fff;
color: green;
position: fixed;
animation-name: Anim;
animation-duration: 1.4s;
}
#keyframes Anim{
25% {color: red;}
50% {color: blue;}
}
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script type="text/javascript">
$( "#AnimationElementID" ).addClass("AfterScroll");
var set = false; // will be false on page load
$( window ).scroll(function() { //On Scroll Event Handler, Could also be window.onscroll (DOM)
// JS HTML DOM get element position relative to viewport
var rect = document.getElementById("AnimationElementTriggerDivID").getBoundingClientRect();
// This is the offset at where your animation would start, 100 = div is 100px from viewport top
if( rect.top <100 && set==false){
$( "#AnimationElementID" ).toggleClass("Initial");
$( "#AnimationElementID" ).toggleClass("AfterScroll");
set=true; // so we only toggle the class once
}
});
</script>
</head>
<body>
<p class="Initial" id="AnimationElementID">
Hi im a text and I will change color if you scroll
</p>
<div id="AnimationElementTriggerDivID" style="background-color: #ccc; position: relative; top:200px; width:20px; height:2000px"> </div>
</body>
</html>
Maybe someone else can provide a better JQuery only option, or a cleaner function, but until then, feel free to use this.
PS: if possible, please provide Code snippets in order for people to be able to help you better and faster.
I read some online articles and they say that html tag represent the browser window, so html is equals to the browser window size. If the body size is greater than the html size, then the scrollbar will show up. So it is the html element that controls to display the scrollbar or not.
It's like in this picture:
You may think of it like:
html { overflow: auto; }
So if want to hide the scroll bar on purpose, I would do:
// myCSS.css
html { overflow: hidden;// override default }
If I want to scroll to a position of the body:
var position = 500;
$('html').animate({scrollTop: position}, 1000);
This sounds all promising. But I used FireBug to check the height of the html tag, they are always greater or equal than the size of body. (Assuming a default webpage with no css, and contents in body exceed window size) The html tag size is not really the size of the browser window, and it is more of the size of body element.
So where does the scrollbar really come from? How does the scrollbar really work?
I read some online articles and they say that html tag represent the
browser window, so html is equals to the browser window size. If the
body size is greater than the html size, then the scrollbar will show
up. So it is the html element that controls to display the scrollbar
or not.
That's very wrong indeed.¹
What the CSS 2.1 Spec section 9.1.1 says is
When the viewport is smaller than the area of the canvas on which the
document is rendered, the user agent should offer a scrolling
mechanism.
Yet that doesn't seem quite correct either, since a scroll is not generally provided to move the viewport over areas of the canvas that have a negative x or negative y value, even if content is painted there.
The best I can establish is that the scroll bars are made available to move the viewport over the areas of the canvas which have a rendered box for 0 or positive x and y co-ordinates.
Whatever, neither the size of the html element box, nor the body element box are special. They are just rendered boxes on the canvas, the same as other elements. Other elements may be rendered outside those boxes, because of overflow or absolute positioning and the scroll mechanism will take the full size of those elements into account.
An example and diagram may help understanding. Consider this example:
<!DOCTYPE html>
<html>
<head>
<title>Scroll limits</title>
<style>
html { padding:20px; border:1px green solid; height:80px; }
body { margin:0; border:1px black solid; height:150px; }
#div1 { position:absolute; top:-50px; height:65px; left:-50px;
width: 65px; background-color:blue; }
#div2 { position:absolute; top:200px; height:65px; left: 110%;
width: 65px; background-color:yellow; }
</style>
</head>
<body>
body
<div id="div1">div 1</div>
<div id="div2">div 2</div>
</body>
</html>
JsFiddle
results in this:
¹ The online article probably, and the picture in the question definitely, come from http://phrogz.net/css/htmlvsbody.html. It should be noted that that article was written in 2004. In 2004, what the then draft CSS 2.1 said didn't really matter. What mattered was what IE6 did, and the article does describe what IE6 did.
This works:
html {
height:100%;
width:100%;
overflow: hidden;
}
Scrolling has to do with overflow. When the body overflows the document.documentElement (the html element) the scollbar/bars appear. While other Elements' overflow defaults to visible the html tag defaults to scroll. To answer your question, the scrollbar appears on the parent of the overflowing content, when the parent's overflow is set to scroll, in this case the html tag.
I started to develop a sniper game but i am finding a trouble moving the sniper image inside the div my main goal is when the mouse is over the div i want to change it's image to the sniper image that's what i did :
<center>
<div id="field" class="cursor1">
</div>
</center>
<script type="text/javascript">
$(document).ready(function() {
$("#field").mouseover(function() {
$(this).addClass("cursor");
});
});
</script>
<style type="text/css">
#field
{
width:300px;
height:300px;
border:1px solid;
}
.cursor
{
cursor:url("sniper.jpg") ;
}
</style>
but that didn't work. How can I move the image inside the div?
I would not suggest setting your mouse image with css, because it's easier to adjust image size and center it with replacing mouse cursor with a real image.
$('#box').mouseenter(function(){
$('img').css('display','block');
});
$('#box').mouseleave(function(){
$('img').css('display','none');
});
$("#box").mousemove(function(event) {
$('img').css('left',event.pageX-20);
$('img').css('top',event.pageY-20);
});
I made a simple example of this http://jsfiddle.net/N9pu4/
Also consider using canvas element for rendering graphics.
The basic (CSS 2.1) syntax for this property is:
cursor: [<url>,]* keyword
This means that zero or more URLs may be specified (comma-separated), which must be followed by one of the keywords defined in the CSS specification, such as auto or pointer.
(see https://developer.mozilla.org/en-US/docs/Web/CSS/cursor/url?redirectlocale=en-US&redirectslug=CSS%2Fcursor%2Furl)
So you should provide a fallback value:
.cursor
{
cursor:url("sniper.jpg"), auto;
}
#field:hover
{
cursor:url("sniper.jpg") ;
}
UPDATE 2
I found a tentative solution that currently works for me in Chrome on Mac OS X. You can check out my answer below for details. For those of you who are still trying to come up with CSS only solutions or JavaScript solutions, please keep going and let me know what you come up with! Please :)
UPDATE
The answer below is really close to an all CSS solution, so I'm going to try to make it work. In the meantime, I'm opening up this question to JavaScript solutions as well. How would you do it using JavaScript? All solutions are now welcome :)
Let's see if we can solve this one together!
I'm trying to set up a layout, check out the image...
I'm using the "sticky footer" technique, which works great, and I've set it up so that whenever one of the two columns gets taller, the other will also match its height, as described in this article. The problem, however, is that these two columns don't reach the footer naturally... I'm forcing the height through JavaScript.
Anyway, all the relevant code can be seen in the fiddle...
CODE
http://jsfiddle.net/UnsungHero97/XrJMa/embedded/result/
QUESTIONS
First big problem: how can I set it up so that the height of these columns reaches the footer below? I want it so that when the page loads, both pink and blue columns reach the bottom automatically.
How can I get it so that when the pink column grows beyond its current height, a local scrollbar appears, but when the blue column grows beyond its current height, the overall page scrollbar appears and the footer is pushed down?
- basically, I want the height of the pink and blue columns to ALWAYS be the same height but the height is only determined by the blue column; blue is dominant so it can expand the height of both columns; pink cannot expand the height, just be at the same height as blue
Can this functionality be achieved using only CSS?
Let me know if I need to clarify anything.
There were many issues, so I rewrote it. I have created exactly what you want. Enjoy. =)
http://jsfiddle.net/hRkx8/53/
The trick is to have your main region have a margin-bottom the same height as your footer (which you absolutely position). Thus as your blue thing gets larger, it will start pushing the bottom of the page a bit earlier than it normally would.
(edit: this version moves the footer, which is more difficult to do; however the question asked that the blue area be initialized to be as large as possible, see below for one way to do this)
Here we go! Unfortunately I have to include it inline, since jsfiddle has some severe bugs that prevent proper display. This version has the blue area start all the way at the bottom.
absolutely-positioned elements seem to have some trouble automatically scrolling as the page gets bigger, so I created a dummy #main div much like you did and had it fill the entire viewport, then inside that is both the #footer and #content (your blue and red stuff). The #footer is absolutely positioned so it takes up no space / the document doesn't care about it. As the #content expands, the #main container expands with it, dragging the footer along. The use of a margin-bottom is necessary to prevent the footer from hiding text.
The actual amount of CSS required to do this is, if you remove the demo stuff, just about 5 lines and dummy element.
<html>
<head>
<style>
body {
margin:0; padding:0;
}
* { /* just for demonstration */
box-sizing:border-box;
padding:5px;
border:1px dashed red;
-webkit-border-radius:10px; -moz-border-radius:10px;
background-color:hsla(0,50%,50%, 0.1);
}
/*important to use min-height not height*/
#main {
position:relative; width:100%; min-height:100%;
border:3px solid green;
}
#footer {
position:absolute;
left:0px; right:0px; bottom:0px; height:5em; /*can be anything*/
background-color:lightgrey;
}
#content {
position:relative;
box-sizing:border-box;
background-color:skyblue;
margin-left:auto; margin-right:auto;
padding-bottom:5em; /*must be same as #footer's height*/
margin-top:10%; /*browser bug: actually acts like 20%*/
width:50%;
min-height:80%; /*should equal 100%-marginTop*/
border:3px solid blue;
}
/* dependent elements */
#sidebar {
position:absolute;
top:0px; bottom:0px;
right:100%; width:7em;
background-color:pink;
overflow-y:scroll;
}
#topbar {
position:absolute;
bottom:100%; height:3em;
right:-10%; left:10%;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.2/jquery.min.js"></script>
<script>
setTimeout("$('pre').animate({height:1500}, 3000)", 1000);
</script>
</head>
<body>
<div id="everything">
<div id="main">
<div id="content">
<div id="sidebar">
alpha
<br/>
beta
<br/>
gamma
<br/>
etc.
</div>
<div id="topbar">
Menu1 * Menu2 * Menu3 * ...
</div>
This is my site.
Yay.
<pre>
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
etc.
</pre>
</div>
<div id="footer">
footer
</div>
</div>
</div>
</body>
</html>
Is it just me, or is the pink elephant in the room sitting on a ...
< T A B L E >
???
Update (April 20th, 11:40AM): Here's the <table> version:
http://juliusdavies.ca/stackoverflow/pink_elephant.html
Be sure to resize your browser window a few times to see it in action.
IE8 - perfect
Chrome - perfect
Safari - no scrollbar, otherwise okay
Firefox - no scrollbar, otherwise okay
based on your most recent answer, I take it you don't need the footer to be full width (only sticky, though yours isn't) and also I presume you know that your version will only work if you know the height of the "foo - not so important content", as you need the that height to set the top co-ordinate for the sidebar .
You version falls down in that when you narrow the window content disappears off the sides.. but based on the thinking behind it - I've used your logic extended it and built in the sticky footer, top menu - everything that was in the original example link.
the footer's not full width, but you can make it look like it is by putting a background image on the html element, I have a plain dummy image in my fiddle but it's not showing up, anyway you would make an image the same height/color as the footer with the 1px border built in
this absolutely relies on you being able to fix/calculate the height of everything above the pink/blue columns
there is a lot less container divs needed for this and the content is now before the sidebar in the source
Here's the fiddle : fullsize : to edit
I see this as a design having a top a middle and a footer. The middle section contains both the pink and blue columns.
Using CSS, place a repeating image in the background of the middle-section behind both the left and right columns. This image would show the edges of both columns. Hopefully your design will accommodate this. I admit I do not know, without really digging into the code, how to make the middle expand all the way down to the bottom. I should think there are some different ways to approach this.
Use css overflow: auto; for your pink column; for the blue, set overflow: auto; on the or tag.
I hope this helps...
I am looking for some good jQuery, XHTML & CSS code to achieve the effect as seen in the following image:
http://i48.tinypic.com/a3o4sn.jpg
Obviously this is a static image, what is supposed to happen is the text and the transparent background is hidden, and when you put your mouse over the image it slides up into view and down again onmouseout.
I think this is an accordion, can anyone point me in the right direction (or maybe you've seen another site that does this)?
Your may be interested in this great resource: Sliding Boxes and captions
DEMO
I've recently used a jquery plugin that does something quite similar.
You may find the plugin does all you need, or look at the source to see how the slide-in effect is achieved (although, of course, there's more than one way to do just about anything).
The plug-in is called Showcase
Its home page has more info and demo and tutorials
Finally, as an added demo, here's the site where I used it.
HTH
My approach to this effect is to have a div with overflow: hidden and the transparent black div with a top margin that puts it "outside" the container." Using .hover() you can tell the black div to slide up when the mouse is over the container div, and to slide away again when the mouse leaves.
Markup:
<div id='container'>
<div id='slider'>Some Text</div>
</div>
Styles:
div#container {
height: 100px;
width: 100px;
overflow: hidden;
}
div#slider {
width: 100px;
height: 40px;
margin-top: 100px;
background: black;
}
And your script:
$('#container').hover (
function () {
$('#slider').css('margin-top', '60px'),
$('#slider').css('margin-top', '100px');
);
I forget if you have to put the 60px in quotes or not, or if you have to pass 60 as an int, play around with it, but hopefully this gets you started.