I'm trying to update the css (the css is located in my main.css) of divs that do not exist on my main html file but do in the files i am injecting. Is this possible? if so how?
ok so here is what I have in my main html file
<div id="container">
<div id="page">
<!placeholder>
</div></div>
sorry about the bad formatting i just can't get the tabs and new lines to work with the code input system on this site.
next is what I have for main.css
#container {
position: fixed;
margin-right: 0px;
overflow-x: hidden;
overflow-y: scroll;}
#page {
position: absolute;
width: 100%;
height: 1600px;
z-index: 10;
border-left: 1px solid #CCCCCC;}
#recposts {
position: absolute;
left:0;
top:1200px;}
.child {
height: 400px;
border-top: 1px solid #CCCCCC;
border-bottom: 1px solid #CCCCCC;
z-index: 11;
background-color: #EDEDED;
width: 100%;
padding-right: 10px;}
alright and now what I'm injecting
<div id ="page">
<div id="recposts" class="child">
<h1> Recent Posts </h1>
</div></div>
So I need to be able to edit the position top of #recposts and the height of .child.
I fixed my issue the problem was that I wasn't editing the css on the html load. I put the function into the .load() and now it works.
Your question is unclear, from what I understood, you can solve it using Jquery live() api.
http://api.jquery.com/live/
You can change whatever you want to the newly added items by using Jquery live() api.
You can trigger a function call after insertion, by using jquery's DOM change() api .
http://api.jquery.com/change/
eg :
$('#container').change(function() {
$('#page').css("height",200);
});
EDIT: Since the change() api will not work on divs, here's the correct version
$('#container').bind("DOMSubtreeModified", function() {
$('#page').css("height",200);
});
If the CSS rules are in a file that is already loaded (your main.css), then any new elements that are added later (say, from whatever HTML you're talking about injecting), and that match selectors in the CSS file, will automatically have the styling rules applied. Is that what you're after?
I am not sure if this is what you were looking for, but this will add a span with class "someClass" to the div id="insertion".
css:
.someClass{ background-color:black; }
html:
<div id="insertion"></div>
js:
<script>
var toInsert = document.createElement("span");
toInsert.className = "someClass";
document.getElementById("insertion").append(toInsert);
</script>
Related
I'm working on a CSS file and I'd like it to interact with anothet CSS file.
How? Let's say I have A.css and B.css. In A.css I want to do the "overflow: hidden" referred to B.css and all the elements that it controls.
Is anything like that impossible?
Like:
#import "field.css"
.sky .field {
overflow:hidden;
}
So basically this what I actually have:
.sky {
width: 90%;
height: 100%;
background: blue;
opacity: 0.7;
position: absolute;
z-index: 1;
}
.field {
width: 100%;
height: 20px;
background: green;
position: fixed;
top: 90%;
z-index: 2;
}
.field > p {
width: 100%;
height: 40px;
background: black;
}
Now I want that "p", which is a sub-tag of .field to not show outside of the bounds of .sky.
How do I do that?
No need to import one CSS file into the other simply link to both CSS files in your HTML. For example if you had the following two files
File A:
.sky .field {
overflow:hidden;
}
File B:
.sky {
color: black;
}
Sky would inherit both properties of overflow hidden and color black. If the rules contradict each other for example file A says sky color is blue and file B says black then the CSS rule sheet which is linked last will take presidence.
Edit: Generally it isn't good practise to do this for organization purpose. If Sky is a single objection consider putting all CSS references to it in a single file.
Load both the CSS files into your page. You can actually have multiple files which define style rules on same element. So lets say you have two file
File 1
.sky{
background-color: Red;
}
And File 2
.sky.field {
overflow:hidden;
}
And lets say the page has a element with class div and field.
<div class='sky field'></div>
Now this will have both the combined CSS rules.
Also make sure you get yourself familiar with CSS Priorities, If 2 files have the different CSS rule on the same element then what happens??
Example
//File 1
.sky{
background-color: Red;
}
//File 2
.sky.field {
background-color: Blue;
}
Now the file that is placed last in the HTML DOM will have more priority over other rules. Note that its NOT the last file loaded but the last file in the DOM hirarchythat gets the priority.
JSFiddle
When you click the button, you see that :active pseudoclass is triggered for the parent div. Is there a pure CSS (or some JS library) way of :active pseudoclass not toggling on button click?
I tried z-index, position: absolute & fixed and no success.
From the spec:
Selectors doesn't define if the parent of an element that is ‘:active’ or ‘:hover’ is also in that state.
That means it's implementation dependent. If an implementation chose to act this way (as current browsers obviously do), there's nothing in the standard that can change that.
With CSS4, you might be able to do:
.parent:active:not(:has(:active)) {
color: red;
}
but that is neither available nor finalized yet.
If you really want to solve this with CSS only:
If your button is active, add a :before-pseudo-element and with position: absolute; give the :before the same background as the parents.
button:active::before {
content: '';
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: #eee;
z-index: -1;
}
Now all that is needed is that the parent is :
position: relative;
z-index: 0;
Have a look: http://jsfiddle.net/s0at4w4b/4/
This does not solve the underlying issue, but is a solution for your current problem.
I don't think :has pseudo-class will ever be available in stylesheets. If browsers finally decide to implement it, it will probably be only for JS APIs like querySelector.
However, I have much more hopes for :focus-within, which seems much simpler to implement.
#parent:active:not(:focus-within) {
background-color: red;
}
Of course, it will only prevent :active from being applied to #parent when clicking a focusable element like a button. You can make other elements focusable by adding tabindex = "-1"
Sadly, :focus-within is not widely supported, but you can use a JS polyfill.
#parent {
border: 1px solid black;
width: 300px;
height: 300px;
}
#parent:active:not(.focus-within) {
background-color: red;
}
<script src="https://gist.githubusercontent.com/aFarkas/a7e0d85450f323d5e164/raw/"></script>
<div id="parent">
<button>Click me</button>
<p tabindex="-1">Or me</p>
</div>
Github does not allow hotlinking, so the snippet above might not work unless you copy the polyfill to your server and use it.
Perhaps the simplest way of achieving what you probably really want to do is to put not put the button inside the div you don't want activated.
Here, you have a container div, which contains a background div (the equivalent of the parent div in your original example). The background div has an active state separate from the button's.
.container {
position: relative;
width: 200px;
height: 200px;
}
.background {
position: absolute;
width: 100%;
height: 100%;
border: 1px solid black;
background-color: #eee;
}
.background:active {
background-color: red;
}
button {
position: relative;
}
<div class="container">
<div class="background"></div>
<button>Click me!</button>
</div>
This may or may not work for you, but this is how I achieve it with pure CSS. The only caveat is the dependence of focus-within which isn't supported by IE or Edge.
.parent {
transition: background-color;
}
.parent:active:not(:focus-within) {
background-color: red;
transition-delay: 1ms; // Delay one cycle to allow child to focus
}
What's going on here is, the parent element will get the active state, as will the child that gets clicked. The only difference is that the focus will apply to the child element, but only on the next cycle. To circumvent any animations from while in this 2 step process, apply a 1ms delay. The next cycle, the element will be active, but the focus will be applied to the child. Thus, the parent will not apply the transition. I would imagine animation delay: 1ms would work the same way.
Another alternative is to give the item a tabindex=-1 attribute and use
.parent {
transition: background-color;
}
.parent:active:focus {
background-color: red;
}
The only issue with this is the fact it may change keyboard navigation behavior and relies on some HTML as well. If you do want keyboard navigation use tabindex=0 or any value besides -1. But there's no JS used.
There are some nice polyfills for focus-within that you can use for IE/Edge but that would go outside "CSS Only".
But, we can put both of them together to create this:
.parent {
transition: background-color;
}
.parent[tabindex]:active:focus {
background-color: red;
}
.parent:active:not(:focus):not(:focus-within) {
background-color: red;
transition-delay: 1ms;
}
This works on IE11, Edge, and Chrome.
http://jsfiddle.net/s0at4w4b/42/
here's a jquery solution instead of using the css pseudo class :active
$(document).ready(function() {
$('button').mousedown(function(e){
e.stopPropagation();
console.log('i got clicked');
});
$('div').mousedown(function(e){
$('div').css('background', 'red')
}).mouseup(function(e){
$('div').css('background', '#eee')
});
$(document).mouseup(function(e){
$('div').css('background', '#eee')
});
});
div {
width: 200px;
height: 200px;
background-color: #eee;
border: 1px solid black;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<button>Qlick me</button>
</div>
As far as I know, the the active state will bubble up. So all parent nodes will have an active state.
Therefore, I don't now of a pure CSS solution. You can avoid a javascript solution (which I assume is what you're really after), by altering the markup so that the div that has an active state is no longer a parent of the button. You can make them siblings, for example.
The CSS part of that solution is then fixing the layout so it appears the same now that they are sibilings as what it did when they were parent>child.
Without seeing a fiddle of what you're working with, I can't offer you a more specific solution I'm afraid.
try this
html:
<div class="current" id="current">
<button id="btnclick" >Qlick me</button>
</div>
css script:
div {
width: 200px;
height: 200px;
background-color: #eee;
border: 1px solid black;
}
.current_active{
background-color: red;
}
jquery:
$("#btnclick").click(function(){
$("#current").toggleClass("current_active");
});
JSFiddle
ps: include the jquery library file
The :active pseudo-class applies while an element is being activated by the user. For example, between the times the user presses the mouse button and releases it. On systems with more than one mouse button, :active applies only to the primary or primary activation button (typically the "left" mouse button), and any aliases thereof.
There may be document language or implementation specific limits on which elements can become :active. For example, [HTML5] defines a list of activatable elements.
The parent of an element that matches :active also matches :active.
So there,s no way
Instead of div:active {...} you should code div:active:not(:hover) {...} and the background-color stays untouched.
(old snippet removed)
UPDATE
To keep the main div behaviour intact and a more generic approach I usually create several layers.
Check the snippet below, toggling to green is just to prove that it works while position and abolute are just quick and dirty for now:
#layer-data {
width: 200px;
height: 200px;
background-color: #eee;
border: 1px solid black;
}
#layer-data:active {
background-color: red
}
#layer-btns:active {
background-color: green
}
#layer-btns {
z-index: 1;
position: absolute;
top: 1px;
left: 1px;
background: transparent;
padding: 5px;
width: auto;
height: auto
}
#layer-data {
z-index: 0;
position: absolute;
top: 0;
left: 0;
text-align: center;
line-height: 200px
}
<div id="layer-btns">
<button>Qlick me</button>
<br/>
<button>Qlick me too</button>
<br/>
<button>Qlick me three</button>
</div>
<div id="layer-data">
some data-layer
</div>
There doesn't seem to any CSS way to handle this case. (not sure about CSS4, the way Amit has suggested.) So here is JQuery way.
The idea is you handle mousedown and mouseup events at 3 levels:
the parent div
the button where you don't want the active state propagated to parent div (".btn1" in the example below)
any other children except the button in second condition. (".btn2" in the example below)
JS Fiddle
HTML:
<div>
<button class="btn1">Qlick me1</button>
<button class="btn2">Qlick me2</button>
</div>
JQuery:
$(function(){
$('div').each(function(e){
$(this).mousedown(function(e){
$(this).addClass("activeClass");
}).mouseup(function(e){
$(this).removeClass("activeClass");
});
});
$('div .btn1').each(function(e){
$(this).mousedown(function(e){
e.stopPropagation();
}).mouseup(function(e){
e.stopPropagation();
});
});
$('div :not(.btn1)').each(function(e){
$(this).mousedown(function(e){
$(this).parent().addClass("activeClass");
}).mouseup(function(e){
$(this).parent().removeClass("activeClass");
});
});
});
CSS:
div {
width: 200px;
height: 200px;
background-color: #eee;
border: 1px solid black;
}
.activeClass {
background-color: red;
}
CSS pseudo-elements are incredibly useful -- they allow us to create CSS triangles for tooltips and perform a number of other simple tasks while preventing the need for additional HTML elements. To this point, these pseudo-element CSS properties have been unreachable by JavaScript but now there's a method for getting them!
Check this:
http://davidwalsh.name/pseudo-element
http://davidwalsh.name/ways-css-javascript-interact
Notice that I need to declare the img source from the html (this will be dynamic), so i dont use background here.
HTML
<div class='some-form'>
<form>
<button>...<button>
<img id="some-img" src="something"/>
<input id="some-input"/>
</form>
</div>
CSS
.some-form {
display: block;
position: relative;
}
.some-form #some-input {
background-color: rgba(255,255,255,0);
border: 1px solid #2F2F2F;
width: 300px;
color: #000;
opacity: 1;
}
.some-form #some-img {
position:absolute;
background-color: #FFF;
z-index: -1;
//background-size: contain; //this does not work
//background-position: center right 50px; //so this will not work
}
How can I get the image to act like contain so that I can align it the way i want?
Keep your code as-is, but change #some-img from an img to a div (and specify width and height as needed based on the image dimensions). It's not possible (at least not in a simple way) to make an img element behave as if it was using background-size and background-position properties since img elements are not backgrounds. So in order to do so, you instead make the image a div with a background-image.
Since you are dynamically populating the image src, you can instead use inline styles to define a background-image on the div, as this lets you call a PHP or other server-side function to echo the image url (which you can't do in a CSS file).
So for example, keep the CSS you have now (but add height/width or other styles to the #some-img div as needed) but replace <img id="some-img" src="something"/> with something like this:
<div style="background-image: url(<?php theDynamicImageURL(); ?>);"></div>
or equivalent in whatever language or method you are using to populate the image dynamically.
There are better ways to do this as inline CSS is generally something that should be avoided, but the use in this case is not too dangerous but it'll work in a pinch and most other methods would either be equally sloppy or a lot more work.
If you include jquery, you can write a script to cheat this:
<script type="text/javascript">
height = $('#some-img').height();
width = $('#some-img').width();
src = $('#some-img').attr('src');
$('#sime-img').wrap('<div id="contain"></div>');
$('#contain').height(height).width(width);
$('#contain').css('background',"url('" + src + "')");
$('#contain').css('background-sizing','contain');
$('#some-img').css('opacity','0');
</script>
It isn't nice. You can do the same thing w/o JQuery, I just used it for convenience.
If I understand correctly, you're looking to constrain an image to the size of its containing element and center it vertically and horizontally.
This will get you pretty close, but the image will only scale up to its actual size, no bigger.
HTML
<div class='some-form'>
<form>
<button></button>
<img id="some-img" src="http://lorempixel.com/300/200/sports"/>
<input id="some-input" />
</form>
</div>
CSS
.some-form {
display: block;
position: relative;
width:400px;
height:180px;
background: rgba(255,255,0,.1); /* for checking that it fits*/
}
.some-form #some-input {
background-color: rgba(255,255,255,0);
border: 1px solid #2F2F2F;
width: 300px;
color: #000;
opacity: 1;
}
.some-form #some-img {
position:absolute;
background-color: #FFF;
top:0;
bottom:0;
left:0;
right:0;
margin:auto auto;
max-width:100%;
max-height:100%;
z-index: -1;
}
fiddle: http://jsfiddle.net/XNR38/
Good luck!
I have some links, and each of these have a unique href.
lets say link one have href="#first".
and link two have href="#second".
What would then be the CSS to do something with a div? (with the ID box)
I have tried lots of things like:
#first:target #box{
something..
}
#second:target #box{
something else..
}
#linkOne:hover #box{ width:200px; }
This changes the size of #box by hovering #linkOne I want the same to happen with :target, like change the size of #box by clicking the link
If you want to select the currently targeted element, you can simply do :target
html
first link
second link
<div id="first">first div</div>
<div id="second">second div</div>
css
:target {
border: 1px solid red;
}
The div with the corresponding id of the link clicked will have a red border.
http://jsfiddle.net/wk3rR/2/
UPDATE
Judging by your comment, it appears you want to manipulate the same box with different current targets, which won't be straight-forward, but can be done if you nest the <div>s with the IDs and then your original css should work:
first link
second link
<div id="first">
<div id="second">
<div class="box">box</div>
</div>
</div>
css
#first:target .box {
border: 1px solid red;
}
#second:target .box {
border: 1px solid yellow;
}
http://jsfiddle.net/wk3rR/3/
If I am not wrong, you are looking for something like the below. This will set the height of the currently targeted element to 20px. Transition effect will also be applied.
HTML:
<a href='#first'>First</a>
<a href='#second'>Second</a>
<div id='first'>This is first div</div>
<div id='second'>This is second div</div>
CSS:
#first, #second {
height: 0px;
overflow: hidden;
transition: height 1s ease-in;
}
#first:target {
height: 20px;
}
#second:target {
height: 20px;
}
Demo Fiddle
EDIT: I know you haven't tagged jQuery/JavaScript and was looking for a CSS solution. But if you have many such links and are ok to have a JS based solution, you can try the below.
This script has a mapping between the id of the link that is clicked and the height that the box is supposed to have when the link is clicked. Based on it, the #box element's height is modified. Transitions will also work as can be seen in this fiddle.
window.onload = function () {
document.getElementsByTagName('body')[0].onclick = function(e){
var box = document.getElementById('box');
var heights = { first: '20px', second: '40px', third: '30px' };
if(e.target.id)
box.style.height = heights[e.target.id];
};
}
I think you need the use of javascript if you want manipulate DOM. You have to remember CSS is only for style the page, not for making actions with the elements.
Trying to change a div background color when hover over another div. But I can't get it to worked. Been seing aroud her now, but can't find a similair question.
<style type="text/css">
#main {
width: 960px;
height: 600px;
margin: auto;
position: relative;
background: red;
}
#trykk {
width: 100px;
height: 100px;
background-color: yellow;
}
#trykk:hover #main {
background-color: green;
}
</style>
<div id="main">
<div id="trykk">
</div>
</div>
Thats the code I've been using. The only problem is that I'm not allowed to use javascript. So is there any way I can change background color on div #main when I hover over div #trykk?
A demo related to Rodik's answer, as he said you cannot change select parent using a child hence you cannot change the style of parent element, but if you want you can change your markup, as you said you cannot use javascript but if you can change the markup than it will go like this
Demo1
HTML
<div id="main">Main</div>
<div id="trykk">Trykk</div>
CSS
#main:hover + #trykk {
background-color: green;
}
Or if you want to nest your div's as you are doing right now, just change the selector like this
Demo2
HTML
<div id="main">Main
<div id="trykk">Trykk</div>
</div>
CSS
#main:hover > #trykk {
background-color: green;
}
CSS selection only works one way, from parent to child.
A child's state, hence, cannot affect it's parent's state.
A javascript mouseover event will be needed to implement this type of functionality.
with jquery you could do this:
$(function(){
$("#trykk").hover(function(){
$("#main").toggleClass("greenBackground");
});
});