How can I include multiple CSS without overwriting the existing CSS? - html

I am using a template (A). This has some CSS files and I want to inlcude an other template (B) in this template and the other template has also some CSS files. By including the css of template B in A, some forms are looking different because of the new CSS of template B.
How can I inlcude all CSS files of both template without replacing some forms.... Can I set a priority to one CSS? Or is there a tool where I can put more CSS files which will compress all CSS files to one?
Or can I use one CSS file to only one DIV?

CSS means "Cascading Style Sheets". Here "Cascading" means that If something is found two times than the last has priority. So link the CSS file at last which you want to give priority. You can also use !important to give priority. For instance:
color: red !important;
Here red will be used overall.

I’m not completely sure what you are trying to do.
However assuming you want to link more than 1 css file to page. You could play with priorities of CSS selectors. An ID for example has more priority than a Class. You could also make them more specific.
For example:
body ul li span {
Color: red;
}
Span {
Color: blue;
}
Here the span should be red

You should try to include the CSS you want for your login page only (template (B)) into your login page HTML only, like for instance:
index.html file :
<link rel="stylesheet" href="templateA.css">
login.html file :
<link rel="stylesheet" href="templateB.css">
The objective if simply to avoid conflicts between both template, you cannot use both of them on the same page it will cause a lot of bugs and slowdown your website a lot.
Please feel free to ask me in the comment if I'm not clear about anything.

Related

_reboot.scss is overwriting my custom CSS

Hello for some reason my custom CSS is being overwritten, I have correctly placed my custom CSS below the CDN bootstrap reference but that does not seem to solve the issue. For example if I am trying to change the font color for a header with an h1 inside. When using classes or id's the font color will not change. Though if I target the header by writing whats below in my CSS file it does work
header h1 {
color: white;
}
I do have an some understanding about specificy but I would assume declaring it with a class or id should be specific enough and go over the _reboot.scss file but it does not seem to. I am using BootStrap 5.
In your example cdn or node_modules css always on top. After that put your custom css files.
Order of prioritization when using multiple contradictory css files

Can we edit bootstrap css style without download the packaging?

I used a lot of bootstrap template that I didn't download, when I open the 'inspect' to change the color etc it show a ..bootstrap.min.scss (something like that) link that I can't even open. Is it posibble to modified the template without having the css file in our computer?
you can always override the styles applied by a framework or external style sheet by creating rules that are more specific. Let's say the bootstrap code styles your links, you will have to create a more specific rule that overrules the previous in your own style sheet on your local machine.
Let's say bootstrap styles the a tag, you can give your body a class like:
<body id="cherry">
my link
</body>
in your css file:
#cherry a {
color: magenta;
}
For further reading I recommend: https://developer.mozilla.org/en-US/docs/Web/CSS/Specificity

CSS overriding by several files

I am sorry beforehand if question is stupid, but this is my first project.
I got html.css layouts from HTML/CSS-coder, and for each view they made separate html and separate CSS file.
But I am developing SPA, so there will be one page as an entry-point. Obviously, it should contain all CSS files for all views. The problem is that some of the CSS files contain classes with the same name, but different content. So if I just put list of CSS files in the entry html, some views become a mess, because they use wrong classes.
Thanks a lot.
As I see that my question is not being understood, I decided to give example:
File1.css, used in view1:
.class1 {
cursor: default;
}
File2.css, used in view2:
.class1 {
cursor: pointer;
}
Obviously, I need both as is and cannot use !important; as this will make a browser to use only one of them in both view1 and view2.
What is correct approach to solve this? Ask html coder to re-name classes, or do it myself? Or is there some tool that can somehow consolidate CSS files automatically?
Also, how usually html/css layouts should be coded for SPA to avoid this situation?
UPDATE 1
I appreciate efforts the SO community made to help me though question is indeed could seem vague. I've already learned a lot from all answers.
The situation is much clearer for me now.
The problem in many projects such as yours is that developers do Not do what they are supposed to be doing in standard manner. The correct approach to manage CSS Files in more than 500 lines of CSS Code is to follow Modular, Structured Patterns such as BEM. These Standards guid you through the right choice for the naming conventions and writing Css Components.
For example in Twitter Bootstrap they use components and utilities to manage large projects and avoid such collisions.
Your way to get out of it
You have always the chance to write your styles inline inside the html code. This would bring a high specificity and will override Clas Based CSS of the files included.
You could provide a .css file of your own and include it after all that developre's css and !important all the mess or with the help of high specificity like ids make your CSS win!
Forget about the whole CSS They provided you and start using a framework like Twitter Bootstrap or Zurb Foundation.
Yes you are going to have to go in by hand and re-code the classes. Additionally You can add id's or an extra class to whatever section you are currently styling.
For example: <div class="CSS-coder" id="myExtraStyles"> or <div class="CSS-coder myExtraStyles">
!important will override most styles. But it would be better to edit the current classes that wont be sharing style attributes.
Additionally remember that "Cascading" means from top to bottom. So any styles loaded after the default styles will override the styles loaded before it.
I agree with the other poster in that a "framework" is the way to go.
Good luck with your project.
If I understand correctly, it seems as though you need to use parent / child selectors depending on which view it is:
file1.css:
.view1 .class1 {
// Styles
}
file2.css:
.view2 .class1 {
// Styles
}
To achieve this, look at each view and see if there's a top-level element you can append a class to, such as the <body> tag:
<body class="view1">
<div class="class1">
AND
<body class="view2">
<div class="class1">
This removes any need for !important (stay away from that as much as you can!)
EDIT
Re-reading your question I think I have a better idea now as to what your actual problem is.
What you can do is to find or add a parent element that you can use to filter out the styles.
Let's say you link to those 2 CSS files and both of them define a style like so:
/* First CSS file */
.sub-div {
background-color: red;
}
/* Second CSS file */
.sub-div {
background-color: blue;
}
On your HTML, look for a parent element that you can use.
<div class='red-only'>
<div class="sub-div"><p>View 1</p></div>
</div>
<div class='blue-only'>
<div class="sub-div"><p>View 2</p></div>
</div>
Create a custom CSS (you should link to the file last).
.blue-only .sub-div {
background-color: blue;
}
.red-only .sub-div {
background-color: red;
}
When working with css, the order is important.
The file that is declared last will have the highest precedence.Now with that in mind if you have
<link href="file1.css" rel="stylesheet" type="text/css">
<link href="file2.css" rel="stylesheet" type="text/css">
Then the code specified in file2 will override the code in file1, only if they have the same specificity. Meaning that the more specific declaration will trump even if it is declared in file1. So if you want to override a rule in file1 you will need the exact same declaration in file2.
When working with files created by others like bootstrap or similar it is preferable to create a new file.
<link href="file1.css" rel="stylesheet" type="text/css">
<link href="file2.css" rel="stylesheet" type="text/css">
<link href="myStyle.css" rel="stylesheet" type="text/css">
This will help you avoid trouble that might arise from modifying the originals.
The code inspector in chrome and firefox will be helpful when you need to check wich classes are applied to a certain element.
It might be that your element is applying a class that overrides the one you are trying to apply to the element. For example:
<div class="class1 class2 class3" ></div>
Class3 might override parts of class1 and class2, because it is the class applied last. Like i said, in CSS order is very important.
Do not use !important if possible. You might want to override values later on, and with !important will become difficult to do so. Verify if there are !important declarations in file1, because these might be the ones causing you trouble.
Are you using a programming language? Or just CSS/HTML markup? If you use a programming language (what I suppose, as you got one entry point) you could simply make a big switch statement, check the current view and then inject accordingly the appropriate css file.

Html pages and one css page

I am currently making a website for my college project and I want to make it as good as possible. I basically want to have several HTML pages for my website which I have setup but I want to use only the one CSS page. So basically if I edit one page, for example my second page, how do I change the look of it without editing any of the CSS for my first page. I have tried several things but I honestly have no idea.
Any help is appreciated and thank you in advance.
You cannot just change the layout of each page in CSS, CSS is not aware of what the page you are at.
Either do you change the layout by changing the whole CSS file. Or you try to put the CSS special functions for that page inside the page elements.
Otherwise you can't do that!
For example:
You can create a single CSS file and link it as:
<link rel="stylesheet" href="site.css" type="text/css">
Then in each page, where you want the style to be different you can change the style inline:
<element style="property: value; property_2: value_2;"></element>
Like this!
How about adding a class to the body tag on the second page, then specifying the style that are just for that page by using the class.
Page one:
<body>
<p>This page is boring</p>
</body>
Page two:
<body class="page-two">
<p>That's a mighty fine body</p>
</body>
Then your CSS could be
p {
background: white;
}
.page-two p {
background: red;
}
If you have a lot of extra CSS to apply to the second page, then you might consider using LESS or something similar to make your life easier.
Your best method is to have an app.css file that has global settings like height, width... and then have specific page files index.css, portfolio.css.. that have specific styles like colors.
You can specify your button general style in your app.css, and then more specific styles in each page css file.
app.css:
button{
height: 30px;
width: 150px;
border: 1px solid purple;
color: purple;
}
index.css:
button{
border: 1px solid black;
color: black;
}
Add the app.css to each html file, and then only the specific page css file to each html file. This will make it easy to expand in the future.
You need to create a template for your HTML pages and then link an external style sheet in your <head> section of each page like this:
<link rel="stylesheet" href="mystyle.css" type="text/css">
Then for any special cases that are not part of the template, you can link additional style sheets. Just a side note, embedding styles in elements directly is harder to maintain than linking multiple CSS files.
If you are allowed to use JavaScript, you might like to use a JavaScript template engine like Handlebar.js.
The beauty of template engines is that you can define sections and create dynamic HTML. This may be more complex than what you're wanting here, but it is very cool.
A large list of template engines can be found here: http://garann.github.io/template-chooser/

Give default color for text in html

How do i give default color for text in html ? To explain more in detail...We have dreamweaver or notepad++ or dojo tools or visual studio or any other tool...when we start typing anything..by default it gives color for specified text..Another good example is stack overflow..when some one asks a question...there will be blue color for some text and red for some text and so on...
same like that,i have an web page where when user clicks a button, a message pops up with some html code..so for tags like its should represent one color and content text should be in other color.
hoe do i go about this.?
Thanks in advance
Thanks for reply..Currently we have 5 to 10 lines of html code..but in future as per requirement we might have 1000 or more lines of code..so for each tag i nned to css class ?
Cascading Style Sheets sound like what you're looking for. You can use CSS to define not only colors, but the entire appearance of your page.
The most basic CSS selectors are just the names of HTML tags, so you could write a simple stylesheet like this:
body {
color: blue;
}
h1 {
color: red;
}
p {
color: purple;
}
What you can do is have a master css file and include it in all your html pages. In the master css file you define all your html tags so that they represent what you want the users to see. Once you include the master css file in your html page, it will look same as your other pages. This way you dont need to write css in all the files. You will just need to add a link attribute to all your html files.
<LINK href="master.css" rel="stylesheet" type="text/css">