Thursday, 3 March 2016

INTERNAL CSS

The internal style sheet is used to add a unique style for a single document. It is defined in <head> section of the HTML page inside the <style> tag.
Example:

  1. <!DOCTYPE html>  
  2. <html>  
  3. <head>  
  4. <style>  
  5. body {  
  6.     background-color: linen;  
  7. }  
  8. h1 {  
  9.     color: red;  
  10.     margin-left: 80px;  
  11. }   
  12. </style>  
  13. </head>  
  14. <body>  
  15. <h1>The internal style sheet is applied on this heading.</h1>  
  16. <p>This paragraph will not be affected.</p>  
  17. </body>  
  18. </html>  

CSS Comments

CSS comments are generally written to explain your code. It is very helpful for the users who reads your code so that they can easily understand the code.
Comments are ignored by browsers.
Comments are single or multiple lines statement and written within /*............*/ .

  1. <!DOCTYPE html>  
  2. <html>  
  3. <head>  
  4. <style>  
  5. p {  
  6.     color: blue;  
  7.     /* This is a single-line comment */  
  8.     text-align: center;  
  9. }   
  10. /* This is  
  11. a multi-line  
  12. comment */  
  13. </style>  
  14. </head>  
  15. <body>  
  16. <p>Hello Javatpoint.com</p>  
  17. <p>This statement is styled with CSS.</p>  
  18. <p>CSS comments are ignored by the browsers and not shown in the output.</p>  
  19. </body>  
  20. </html>   

External CSS

The external style sheet is generally used when you want to make changes on multiple pages. It is ideal for this condition because it facilitates you to change the look of the entire web site by changing just one file.
It uses the <link> tag on every pages and the <link> tag should be put inside the head section.
Example:

  1. <head>  
  2. <link rel="stylesheet" type="text/css" href="mystyle.css">  
  3. </head>  
The external style sheet may be written in any text editor but must be saved with a .css extension. This file should not contain HTML elements.
Let's take an example of a style sheet file named "mystyle.css".
File: mystyle.css

  1. body {  
  2.     background-color: lightblue;  
  3. }  
  4. h1 {  
  5.     color: navy;  
  6.     margin-left: 20px;  
  7. }   
Note: You should not use a space between the property value and the unit. For example: It should be margin-left:20px not margin-left:20 px.
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Wednesday, 2 March 2016

CSS SELECTOR

CSS selectors are used to select the content you want to style. Selectors are the part of CSS rule set. CSS selectors select HTML elements according to its id, class, type, attribute etc.
There are several different types of selectors in CSS.
  1. CSS Element Selector
  2. CSS Id Selector
  3. CSS Class Selector
  4. CSS Universal Selector
  5. CSS Group Selector

1) CSS Element Selector

The element selector selects the HTML element by name.

  1. <!DOCTYPE html>  
  2. <html>  
  3. <head>  
  4. <style>  
  5. p{  
  6.     text-align: center;  
  7.     color: blue;  
  8. }   
  9. </style>  
  10. </head>  
  11. <body>  
  12. <p>This style will be applied on every paragraph.</p>  
  13. <p id="para1">Me too!</p>  
  14. <p>And me!</p>  
  15. </body>  
  16. </html>    

How to add CSS

CSS is added to HTML pages to format the document according to information in the style sheet. There are three ways to insert CSS in HTML documents.
  1. Inline CSS
  2. Internal CSS
  3. External CSS

1) Inline CSS

Inline CSS is used to apply CSS on a single line or element.
For example:

  1. <p style="color:blue">Hello CSS</p>  
For more visit here: Inline CSS

2) Internal CSS

Internal CSS is used to apply CSS on a single document or page. It can affect all the elements of the page. It is written inside the style tag within head section of html.
For example:

  1. <style>  
  2. p{color:blue}  
  3. </style>  
For more visit here: Internal CSS

3) External CSS

External CSS is used to apply CSS on multiple pages or all pages. Here, we write all the CSS code in a css file. Its extension must be .css for example style.css.
For example:

  1. p{color:blue}  
You need to link this style.css file to your html pages like this:

  1. <link rel="stylesheet" type="text/css" href="style.css">  
The link tag must be used inside head section of html.
For more visit here: External CSS

Inline CSS

We can apply CSS in a single element by inline CSS technique.
The inline CSS is also a method to insert style sheets in HTML document. This method mitigates some advantages of style sheets so it is advised to use this method sparingly.
If you want to use inline CSS, you should use the style attribute to the relevant tag.
Syntax:

  1. <htmltag style="cssproperty1:value; cssproperty2:value;"> </htmltag>    
Example:

  1. <h2 style="color:red;margin-left:40px;">Inline CSS is applied on this heading.</h2>  
  2. <p>This paragraph is not affected.</p> 


Disadvantages of Inline CSS

  • You cannot use quotations within inline CSS. If you use quotations the browser will interpret this as an end of your style value.
  • These styles cannot be reused anywhere else.
  • These styles are tough to be edited because they are not stored at a single place.
  • It is not possible to style pseudo-codes and pseudo-classes with inline CSS.
  • Inline CSS does not provide browser cache advantages.
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Tuesday, 1 March 2016

CSS

CSS  or CSS 3 provides basic and advanced concepts of CSS technology. Our CSS is developed for beginners and professionals. The major points of CSS are given below:
  • CSS stands for Cascading Style Sheet.
  • CSS is used to design HTML tags.
  • CSS is a widely used language on the web.
  • HTML, CSS and JavaScript are used for web designing. It helps the web designers to apply style on HTML tags.

CSS Example with CSS Editor

In this tutorial, you will get a lot of examples, you can edit and run these examples, with our online CSS editor.

  1. <!DOCTYPE>  
  2. <html>  
  3. <head>  
  4. <style>  
  5. h1{  
  6. color:white;  
  7. background-color:red;  
  8. padding:5px;  
  9. }  
  10. p{  
  11. color:blue;  
  12. }  
  13. </style>  
  14. </head>  
  15. <body>  
  16. <h1>Write Your First CSS Example</h1>  
  17. <p>This is Paragraph.</p>  
  18. </body>  
  19. </html> 

  21. What is CSS

    CSS is an acronym stands for Cascading Style Sheets. It is a style sheet language which is used to describe the look and formatting of a document written in markup language. It provides an additional feature to HTML. It is generally used with HTML to change the style of web pages and user interfaces. It can also be used with any kind of XML documents including plain XML, SVG and XUL.
    CSS is used along with HTML and JavaScript in most websites to create user interfaces for web applications and user interfaces for many mobile applications.

    What does CSS do

    • You can add new looks to your old HTML documents.
    • You can completely change the look of your website with only a few changes in CSS code.

    Why use CSS

    These are the three major benefits of CSS:

    1) Solves a big problem

    Before CSS, tags like font, color, background style, element alignments, border and size had to be repeated on every web page. This was a very long process. For example: If you are developing a large website where fonts and color information are added on every single page, it will be become a long and expensive process. CSS was created to solve this problem. It was a W3C recommendation.

    2) Saves a lot of time

    CSS style definitions are saved in external CSS files so it is possible to change the entire website by changing just one file.

    3) Provide more attributes

    CSS provides more detailed attributes than plain HTML to define the look and feel of the website.


  24. CSS Syntax

    A CSS rule set contains a selector and a declaration block.
    CSS syntax
    Selector: Selector indicates the HTML element you want to style. It could be any tag like <h1>, <title> etc.
    Declaration Block: The declaration block can contain one or more declarations separated by a semicolon. For the above example, there are two declarations:
    1. color: yellow;
    2. font-size: 11 px;
    Each declaration contains a property name and value, separated by a colon.
    Property: A Property is a type of attribute of HTML element. It could be color, border etc.
    Value: Values are assigned to CSS properties. In the above example, value "yellow" is assigned to color property.

    1. Selector{Property1: value1; Property2: value2; ..........;} 
     
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