I have been given an external stylesheet (.css file) that may not altered in any way whatsoever. However I need to apply this stylesheet to a single div and therefore the contents of the div in my already existing webpage. I am currently reading the contents of the stylesheet as text into a blank style tag (using .innerHTML) within the div I need to affect but this still affects the entire web page rather than just the single div. Could someone please help with this?
The IFRAME solution works like this:
In your main HTML file, you'll have your DIV:
<div id="myspecialdiv">
<iframe width="100%" height="100%" frameborder="0" src="divcontent.html"></iframe>
</div>
Style that as you need it. The divcontent.html file should be a complete HTML file, including the content of the DIV tag, and a LINK using your external stylesheet:
<html>
<head>
<link rel="stylesheet" href="path/to/external/stylesheet.css" />
</head>
<body>
<!-- The contents of your DIV -->
</body>
</html>
If you can work with HTML5, you could try using scoped styles. You could include the CSS inside the div, having it affect only its parent:
<div>
<style scoped>
// Styles here
</style>
</div>
This will helps you a lot:
http://css-tricks.com/saving-the-day-with-scoped-css/
Applies only style to a certain delimited escope. Good luck!
IMHO better than the iframe solution..
related: Limit scope of external css to only a specific element?
If you have access to server-side scripting (eg: PHP), you could create a script that loads the external stylesheet, and appends a class name in front of every entry. Then apply this class to your DIV tag. So, if the CSS includes:
p { font-size: 12px; }
You'd modify that to:
.mydiv p { font-size: 12px; }
And format your DIV as
<div class="mydiv">...</div>
You would then load the script as a stylesheet, rather than the external stylesheet directly.
<link rel="stylesheet" href="path/to/internal/script.php" />
I suggest you can leave the external style sheet as it is and create an internal style sheet with the classes that you want from the external stylesheet to affect your single div and just rename it and apply those renamed classes to the div. The renaming is because the attributes of those classes may affect elements already existing on the page from external stylesheets.
<style>
.xxx {...} /* The renamed class from this internal css that should apply to your div */
</style>
Hope this helps.
I assume that the style specifications inside the external file are not contained in classes or IDs, but are they blanket adjustments to tags like <p> (and thus it cannot be included in your page headers). Include your div in a <style scoped> tag and import the .css file there. See: http://css-tricks.com/saving-the-day-with-scoped-css/
You could assign a CSS prefix to target the section of your document you want to style.
scoped is a good idea, but has browser compatible issue.
I solve this problem by adding pre-class before all selector in css file:
https://github.com/ericf/grunt-css-selectors
Related
I don't think it is possible, but I will ask anyway:
Can I apply an external css file (Bootstrap for instance) to a div and its children without affecting the rest of the page.
For example, I need to migrate a footer written with Bootstrap over to an existing page. That page does not use bootstrap. If I link Bootstraps css at the top of the page, the css is applied to the whole page which ruins existing css. How can I just apply the bootstrap styles to the footer section without having to rewrite most of the page's css?
Any suggestions?
I ended up using LESS to compile a new css of bootstrap with a prefix of .bootstrap as seen below. It works, but i wonder if there is a more traditional way of handling this problem.
file: bootstrap-only.less
.bootstrap {
#import 'bootstrap.css'
}
file: bootstrap-only.css
.bootstrap .container {
width: 100%;
}
file: page.html
<style>
.container { width: 20px; }
</style>
<link rel="stylesheet" type="text/css" href="bootstrap-only.css">
<div class="not-bootstrap">
<div class="container">I am 20px</div>
</div>
<div class="bootstrap">
<div class="container">I am 100%</div>
</div>
You can try usig scooped css.Please do refer the following sample code.
<div>
<style scoped>
#import "filename.css";
</style>
//your div with its children will come here
</div>
Your inline styles should not be affected by adding Bootstrap as inline styles take precedence over styles from external resources. The only elements that should be affected are the ones in the page that share class names with bootstrap classes.
You can try referencing the Bootstrap css before your own css and your stylesheet will take precedence over the Bootstrap css. Unfortunately this may add styles additional styles to some of your classes which that you didn't explicitly reference in your stylesheet and may still change the look of your page.
For those classes that exist in both bootstrap and your stylesheet it's probably best to just change the names of those classes in your stylesheet and page. A quick way to do this is to use "replace" search for the class name and replace it with the new class name most IDEs have a way to "replace all" so it's often just a bit of typing and a few clicks to change a bunch of styles.
You can try using the Angular 2+, where you can simply create an component and us it anywhere irrespective of the page css. Basically it will create a shadow DOM and will not be accessible outside that component.
I am trying to add custom styling to my web app. Here is the link to my code:
https://github.com/SammyAbukmeil/rps-challenge
In layout.erb I have the following:
<head>
...
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="css/custom.css">
...
</head>
Which should be loading my custom.css file.
In views/index.erb I have an ID of test:
<img class="img-responsive center-block" style="margin-top: 40px" id="test"src="http://i.imgur.com/hSuFTzO.png">
and in css/custom.css I am calling that ID:
#test {
margin-top: 50px;
}
But for some reason it doesn't apply my custom styling, although bootstrap (which is being linked in layout.erb and is adding styling to the .erb files throughout the project) is working.
I've tried looking through similar questions on stack overflow without success, also tried google for how to add custom styling to a bootstrap project - everything I'm doing seems to be correct.
Any advice is greatly appreciated. Thanks!
EDIT: So i checked the console and found this:
...
Status Code: 404 Not Found
Request URL: http://localhost:4567/css/custom.css
...
So I guess I'm not linking it right.
Bootstrap selectors are very specific, for example body > div > img.img-responsive. You need to be more specific in order to override the selector. You can test this by using temporally the !important declaration:
#test {
margin-top: 50px !important;
}
If it overrides, you have a working setup that just needs more specific selectors. After that you should remove the !important declaration and add details to the selector:
body > div > img#test {
margin-top: 50px !important;
}
In Sinatra any static files (such as CSS files) should be in the folder pointed to by the public_folder setting. Usually this is named public. In your server.rb you set it to be public but relative to the projects root.
You need to create a public folder at the top level of your project (next to app, view etc.), move your css directory to it and then change the setting in server.rb so that :public_folder points to it, similar to what you have done with the :views setting:
set :public_folder, proc { File.join(root, "..", "public") }
First You need to understand the hierarchy of CSS
You Can use Firebug (Firefox) to identify that your styling is apply or not also what class is overrating your custom css.
Note: Also avoid adding ID for CSS Styling
You need to override the bootstrap selector.
It is not good practice to use this in your finished website, however you can use !important to over ride other style rules.
Example of Use
.element-class{
width:50%;
}
.element-class{
width:100% !important;
}
The element would have the width of 100% here.
Read more about when to use this on the css-tricks article
I have included a bootstrap stylesheet in a PHP-File, which I only need for one div. Problem: It should only affect this one div. To achieve that, I placed a link to another CSS before and after the bootstrap-stylesheet as you can see below. But it seems that bootstrap.css still affects some elements outside that div. How can I prevent it from doing it?
<link rel="stylesheet" href="style/style-1.css" type="text/css">
<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.css">
<div class="container">
...
</div>
<link rel="stylesheet" href="style-1.css" type="text/css">
There is one feature in CSS called "scoped css" ... it is not well supported (Fireofx only, I believe ... and I think it's better this way)... It allows to say that a stylesheet applies only to a single element.
In your case, but I definitely do not recommend it, you could do something like :
<div class="container">
<style scoped>
//... copy content from bootstrap stylesheet
</style>
</div>
See here for an example : http://css-tricks.com/saving-the-day-with-scoped-css/
or here : https://developer.mozilla.org/en-US/docs/Web/HTML/Element/style#A_scoped_stylesheet
Check here to know which browsers support it : http://caniuse.com/#feat=style-scoped
The concept of loading a secondary CSS file after the bootstrap CSS file would be to override certain elements and create your own styles. However, since you only want to take one element from the bootstrap CSS file, you will have to override ALL the other elements if you don't want to see the bootstrap styles on your other elements. This I DON'T recommend.
My suggestion is to examine the styling for the certain element that you want to use from bootstrap and then just recreate it in your own CSS file.
I have a site I am adding some functionality to. The site is a bit outdated but I am not being paid to overhaul the entire site, just a few pages. Because of this I am using more modern code on these pages but there is still old code on these pages. Because of the old code (which will stay and not be removed) I have some CSS that conflicts.
Is it possible to make an entire stylesheet only apply to styles within a div.
Example:
<div class="style-sheet-modern">
<!-- My Stylesheet applies only within this div -->
</div>
My first thought was to just rename my css to fall within the div. Example:
.style-sheet-modern .conflicting-class{ /* styles */ }
However, this isn't desirable because there are a few hundred lines of CSS and I don't want to go through and rename all of my CSS. Also makes it difficult to update in the future.
Is there a way to apply an entire stylesheet within a certain div and not anywhere else on the page?
Sure, in most modern browsers. Put a scoped stylesheet WITHIN the div.
<div class="style-sheet-modern">
<style scoped>
.conflicting-class { ... }
</style>
</div>
You can use #import to use external styles. Note, for browsers that don't support it, it will apply the style to the entire page. So you probably just want to add an id to the div you want and style with that, for compatibility.
Why not give the <div> an ID?
Then you could use specificity to override just the classes/ids that are in that div?
IE:
<div id="style-sheet-modern">
<div class="my-class"></div>
<div class="etc"></div>
</div>
You could then target all styles inside the "modern" div like this:
#style-sheet-modern .my-class{
color:black;
}
#style-sheet-modern .etc {}
There would be no browser support issues.
If you're using something like less or sass – you could even have it in a separate file named "style-sheet-modern.less" or whatever you want it named and #import it at the bottom of your main styles file. This include would need to come last in the file so that it will override the other styles that could be applied to those same styles.
You could use a wildcard to reset all the styles inside the #style-sheet-modern as well if necessary like this:
#style-sheet-modern * {
reset: stuff; //obviously not the actual css
}
That reset for those styles would be the first thing in your 'style-sheet-modern.*ss' file.
And as I mentioned before, no browser support issues.
Is it possible to load external Style Sheet after Internal (or embedded) styles get loaded. I mean, say I have a div with Yellow background color, set using embedded style in a page, like;
<style type="text/css">
div{
background-color: yellow;
}
</style>
And can I change the background color to green using an external style sheet like;
<link rel="stylesheet" href="style.css" type="text/css" />
If this is possible, show me an example.
I know this is possible with inline style, but I don't want to use that.
Yes.
Just put the <link> tag after the <style> tag, or make the selector in the external stylesheet more specific.
To answer your question, yes you can. The styles will be applied in a specific order. See here for precedence rules in CSS.
if you want to overwrite a css with same class, you can use 'important' in that class. Study more about important in css.
offcourse you can just place the external style sheet after the internal style sheet in HTML head section to override the internal style sheet!
CSS ORDER
What style will be used when there is more than one style specified for an HTML element?
Generally speaking we can say that all the styles will "cascade" into a new "virtual" style sheet by the following rules, where number four has the highest priority:
1. Browser default
2. External style sheet
3. Internal style sheet (in the head section)
4. Inline style (inside an HTML element)