ob-vaults/Phoenix/Web dev/html-css/css.md
2024-09-12 17:54:01 +03:30

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status: #doc Tags: #html #css links: html-css Date: 2023-08-01


css

Three Ways to Insert CSS

There are three ways of inserting a style sheet:

External CSS
Internal CSS
Inline CSS

External CSS

we add link tag in head section of html

<head>  
<link rel="stylesheet" href="mystyle.css">  
</head>

then we make our css in mystyle.css like this

body {  background-color: lightblue;}  
  
h1 {  color: navy;  
  margin-left: 20px;}

Internal CSS

we can make our css inside our html with <style> tag inside <head> tag

<head>  
<style>  
body {  background-color: linen;}  
  
h1 {  color: maroon;  
  margin-left: 40px;}  
</style>  
</head>

Inline CSS

An inline style may be used to apply a unique style for a single element.

To use inline styles, add the style attribute to the relevant element. The style attribute can contain any CSS property.

<!DOCTYPE html>  
<html>  
<body>  
  
<h1 style="color:blue;text-align:center;">This is a heading</h1>  
<p style="color:red;">This is a paragraph.</p>  
  
</body>  
</html>

Tip

If some properties have been defined for the same selector (element) in different <style>sheets, the value from the last read style sheet will be used.

Cascading Order

What style will be used when there is more than one style specified for an HTML element?

All the styles in a page will "cascade" into a new "virtual" style sheet by the following rules, where number one has the highest priority:

  1. Inline style (inside an HTML element)
  2. External and internal style sheets (in the head section)
  3. Browser default

So, an inline style has the highest priority, and will override external and internal styles and browser defaults.

how css work

we use css selector to chose elements then we set css-property values and ;

selector {
css-property: value;
}
/* example */
p{
background-color: lightblue;
}

css-selector


References

https://www.w3schools.com/css/css_howto.asp