I need a simple <hr/> in a page that extends a default one (I'm using Django template framework); in this default page, a standard and untouchable stylesheet styles HR with border:none; height:1px but I would like to reset these styles to their default values.
I tried putting {border:1px inset; height:auto;} in my page but I didn't get the same aspect as having no style at all.
Is there a method to restore the default style for a tag?
In order to make your rule apply, you'll need to ensure that you give your rule a greater specificity than the existing rule in order to override it.
For example, if the rule is this:
hr {
/* rules */
}
Then you would need to do something like this:
html hr {
/* your rules */
}
Scores are calculated by these basic rules:
elements, like div are worth one point
classes, like .comment are worth 10 points
ids, like #user123 are worth 100 points
The total score for the selector is the sum of all of its parts, so div.class is worth 11 (10 for the .class and 1 for div
(It's actually a bit more complicated than this - see this article for details - but this explanation works as a general rule)
Edit:
I just saw your comment about not knowing the defaults.
According to Firebug, an hr appears to look like this:
hr {
height: 0;
width: 100%;
border: 1px solid #808080;
margin: 8px 0;
}
You can use the tools provided in other browsers to see if they use a different set of styles, then decide for yourself which ones would be the best ones to use.
Try YUI 2 Base CSS, seems to be doing what you want. Or even YUI 3 Base CSS
There is a possibility to "restore" default styles only for a certain context
Update
Just checked - Base CSS does not include styles for hr element
The default stylesheet for HTML documents, without any overrides, is defined by the W3C. You can find the full default stylesheet here: http://www.w3.org/TR/CSS2/sample.html
Alternatively, you could use Firebug in Firefox (or any similar tool) to view the styles of an <hr /> element on a test page without any styles applied.
Sure, you need to give your styles a bigger weight; add an id to your < hr/>, or do this in CSS:
html body hr { ... your styles ... }
No. You either have to not apply the styles in the first place, or override every broken style with explicit values.
You can also give your styles more weight with the !important property. If the original is like this:
.someClass { color: red }
You can override it with this:
.someClass { color: green !important}
Related
I have a weird one that I can't seem to be able to figure out. I am new to CSS and decided to use bootstrap to assist with styles etc.
the problem I have is when I try to assign two classes to a div element, 1 being the bootstrap column and another from my own stylesheet.
the code from my stylesheet seems to be ignored in some cases. now i have taken that one bit of code and css out and put it into the jsfiddle but it works fine. its only when combined with the rest of the html does it seem to have issues. also note that if i use inline styles it works...
I copied the entire code to js fiddle now so that you guys can replicate the issue. the section I am having issues with is the 4 images that are side by side
class="services-boxes"
anyway any assistance will be appreciated, as well as general feedback as I am new to this all! :)
https://jsfiddle.net/d9bv0grx/1/
Due to the way cascading style sheets work it (styles are be applied in order AND by specificity). It is most likely that styles you are expecting to see are being overridden by specificity.
Give this guide a read.
An example is that for <div id="selector">
#selector {background-color:red;}
div {background-color:green;}
You can expect to see a div with a red background, even though the green background is set afterwards, the id selector has greater specificity.
Then try and alter the specificity of your selectors in your css so that they will take precedence over in bootstrap.
Also just going to add, you have casing issues - you declare the class with lowercase in css, capitalised in your html.
You also have syntax issues in your css. Your css should look like:
.services-boxes {
padding:0;
max-height:500px;
width:100%;
}
Sort all this and you should be golden! jsfiddle
Looks like a combination of syntax errors. Your style should be declared like this:
.services-boxes {
padding:0px;
max-height: 500PX;
width:100%;
}
Note that the class is all lowercase (which should match style where declared which is currently Services-Boxes), a colon separating property and value (you has used = in some instances) and one set of curly braces per declaration (the above class .logo-image has 2 closing braces). Just a bit of formatting should see your code recognised
When you don't have total control over your HTML, you can use the !important property in css to give a priority to your styles.
.services-boxes {
color: red !important;
}
However keep in mind that you have to avoid the !important property as much as possible and do not use it unless you can't do it any other way.
What is the best, most maintainable and readable approach to setting a CSS property as the default for given tags in a portion of a page with low specificity. Currently, I have a page which takes the global default font styling from a html selector in a separate global stylesheet. There is a large portion of my page (which has the class dash) which I want to have a different default font style.
The main issue with just setting .dash h1 { font.... } is that this has very high specificity. Every time I want to set a font style for an element which is a descendant of .dash, I need to refer to .dash. Since I am working around a modular design, where each component is developed independently, this is a very bad idea. An even worse solution would be to set !important or to use an ID, for obvious reasons. Obviously, we don't run into this issue when setting fonts for html h1, or any other tag since all tags have lower specificity than classes.
Is there a simple low-specificity approach to setting a CSS property for tags which are descendants of an element high up in the DOM, selected by a class such that it can be overwritten by applying font properties to and element selected by another class?
You can set font properties with a rule like .dash { font ... } and set font properties for elements inside the element so styled, because each element gets it font properties from the declarations that apply to it, rather than its parent or other ascendant.
For example, if you have
<div class=dash>
some content
<h2>some heading</h2>
some content
</div>
and you set
.dash { font-family: Cambria }
then there is no problem in setting
h2 { font-family: Calibri }
without referring to the dash class. The h2 element gets its font family from the latter rule, quite independently of the rule that applies to its parent.
Doesn't
.dash * { font
do what you need?
UPDATE after clarifying comments and fiddles ...
So, I had your question "backwards" because I thought you were trying to ignore specifics in the included html.
BUT I think my suggestion still works, no?
.dash * { color: red; }
.included-class { color: blue /* this will take precedence */ }
http://jsfiddle.net/zDVED/
Based on Harry Roberts article http://csswizardry.com/2014/07/hacks-for-dealing-with-specificity/#safely-increasing-specificity, I applied the same class repeatedly in order to increase the specificity of that selector above that applied to the portion (which itself is set simply as .portion-class tag).
See:
Harry Roberts: http://jsfiddle.net/csswizardry/3N53n/3/ - note use of .btn.btn on line 28.
mine: http://jsfiddle.net/Emsap/5/ - note use of .dash-heading.dash-heading on line 2
Note that I was, of course, wrong to think that the location of elements in the DOM was affecting the specificity.
How can I turn all text on a page to a specific color?
Content (HTML and CSS) is user generated, so I cannot control classes for specific elements.
Since the page's html, classes, etc can vary tremendously (user generated), I can't write CSS that will target elements individually.
Originally, I had tried to use !important on the body like below, but forgot that any targeted CSS would override it.
body {
color: white !important;
}
Is my only option to use javascript to apply an inline style to every element?
Use * selector, not only body.
* {color: #fff !important}
You can use Universal selector (i.e *) selector to select any element on page:
html * {
color: white !important;
}
OR You can use directly use like this:
* {
color: white !important;
}
From the statement user generated, we can see that users will be able to add some inline styles, even !important ones. Then, your only solution is javascript (jquery example):
$("*").css("color", "#FFF");
Or filter the html to remove the styles with HTMLPurifier, which you should be using to filter the javascript anyway (to avoid MANY kind of attacks on your web.
OLD ANSWER:
Use this within your html's head (not in the stylesheet) because it has preference over the styles in separated files:
<style>
* {
color: #FFF!important;
}
</style>
I'm dealing with a real hash of a site, so this is why I'm asking about this absurd question.
I've looked everywhere to find some sort of way to make a class override another class in the HTML class tag to no avail.
I can either do this, try to untie a ton of spaghetti (which I probably won't be allowed to do anyways), or something anyone else can recommend (would be greatly appreciated).
Is this possible?
class="myClass !important"
If not, is there some sort of equivalent?
Please help! Many thanks in advance!
No, that's not possible. You're going to have to iron out the CSS Specificity by yourself I'm afraid.
If you have the ability to change the HTML templates, you can always go in and add a <div id="override"> or something like that to the outer most wrapper of the page to use as the "master" rule in your CSS classes. Then, in the CSS, you can just add that ID before any of the existing classes or ones that you need to modify.
For instance, if you have the following and want to override the .some-class:
<div class="some-class">Bleh.</div>
And the corresponding CSS:
.some-class { color: red; }
You can wrap the whole thing with:
<div id="override">
<div class="some-class">Bleh.</div>
</div>
And add the #override (or whatever you want to name it) before the .some-class and this rule will take precedence over the other:
#override .some-class { color: green; } /* This will override the red color form the other rule */
.some-class { color: red; }
You can't use !important for entire selectors. You need to find the specific rules you want to override, and use !important on each.
You can add more than one class to a selector as follows:
class="myClass myClass2"
Above is what the class attribute would look like on your HTML element.
As far as the CSS goes, define the classes as follows:
.myClass {
color: black;
font-size: 14px;
}
The above is just a sample of some properties you may have.
Defining "myClass2" after "myClass" in your stylesheet will allow the properties from "myClass2" to overrided the matching ones in "myClass":
//This goes below myClass
.myClass2 {
font-size: 16px;
}
As long as "myClass2" is after "myClass", your font will take the size property of '16px;' The value of "myClass" will be overwritten by that of "myClass2". If "myClass2" comes before "myClass", you can use !important to ensure that style is taken over the one defined later:
//This goes above myClass
.myClass2 {
font-size: 16px !important;
}
Hope this helps.
CSS classes are just a group of styles so you can use class instead of inline style tag.
The !important keyword helps you to override a specific style and not working on classes.
So, for example:
Lets say that we have a css rule on every div somewhere in our CSS file
div{border:solid 1px #ff0000;}
And later on we have this rule:
div{background:#000000;}
Every div in our page will be with border and a background if we want to override the div css rules we need to do something like this:
div{background:none !important;border:none !important;/*...ADD YOUR CSS...*/}
you can create a css reset class to reset all the settings that you want and than add your css
Note, this is different than the older question How can I apply CSS on all buttons which are present in that page? because this is an already existing style. So given that a style, which we'll call "standard_label_style" already exists in an included CSS file, what can I do to say that all the labels on this page should have that style short of adding:
class="standard_label_style"
to each and every one? And yes, I know I could apply the styles ex-post-facto with a snippet of jQuery or JavaScript code. I'm just trying to learn how I'm supposed to do it with CSS.
Follow Up
I've gotten several comments that say just use syntax like this .standard_label_style, label... Unfortunately that does nothing like what I want. That would allow me to apply additional rules to the standard_label_style class, as well as rules to labels within this page, but would not allow me to apply that style to all the labels on this page. To see an example of this, here is a stylesheet and html to demonstrate. The label without a class will still not appear in red but that's what I'm hoping to have happen. I want to apply an existing class to all those labels on the page, not just the one with the class and without adding new styling on this page, the existing style should be the only style.
included.css:
.standard_label_style { color: red; }
test.html:
<html>
<head>
<link rel="stylesheet" type="text/css" href="included.css">
<style>
.standard_label_style, label { }
</style>
</head>
<body>
<label class="standard_label_style">Test Label</label><br/>
<label>Unclassed Test Label</label>
</body>
</html>
CSS doesn't really work like that.
You can apply a style to all labels directly:
label {
color: Lime;
}
or apply a class to all labels
.labelClass {
color: Lime;
}
<label class="labelClass"></label>
You can also have multiple selectors, so you could ammend your current style to be
.labelClass, label {
color: Lime;
}
What you can't do in standard CSS is something like
label {
.labelClass;
}
The good news is that there are a bunch of server side libraries which make CSS suck less and let you do exactly this kind of thing, see for example dotLess if you're using .NET which provides nested rules and a basic inheratance model.
To apply a style to every label on the page, use this CSS:
label {
/* styles... */
}
If you have an existing style (e.g. "standard_label_style") in the CSS already, you can apply that to every label:
.standard_label_style, label {
/* styles... */
}
This will affect every label through the site, so use with caution!
In your css file, can't you just put
.standard_label_style, label
{
//styles
}
.standard_label_style, label {
/* stuff */
}
I'm not sure you can... one possible workaround (feels a bit hackish though) is to attach the style to your body tag, then change the css to be this:
body.standard_label_style label{
//Your styles here
}
One of the most underused CSS tricks of all time: Give your bodies an id or class!
HTML:
<body id="standard_label_style">
<label>Hey!</label>
</body>
CSS:
#standard_label_style label{
the styles
}
will take the styles, while
HTML:
<body id="custom_label_style">
<label>Custom!</label>
</body>
Will not.
You are dealing here with CSS precedence. Declarations which are "more vague" (body tag, classes) are applied before declarations which are "less vague" (specific elements, inline CSS).
Thus your answer depends on how the stylesheet is defining label styles. If for example it says label {...}, then that's fairly specific, and your best bet is to use a more specific CSS style, see:
http://www.vanseodesign.com/css/css-specificity-inheritance-cascaade/ (good tutorial?)
CSS precedence
The level of "specificity" you need to override, as I said, depend on how specific your other stylesheet was. According to the link, "CSS embedded in the html always come after external stylesheets regardless of the order in the html".
There is also a chance that if you yourself define label {your custom css} that should work, if you import your stylesheet afterwards. It is what I would try first to see if it works. Have you tried this? What was the result?
Note that if you want to completely override the other stylesheet, you will need to also reset any CSS you are not using by settings its values to inherit or as appropriate.