CSS.ppt
- 1. CASCADING STYLE SHEETS Faculty Name: Mrs. Nashra Javed Assistant Professor
- 2. DEFINITION CSS stands for Cascading Style Sheets. CSS describes how HTML elements are to be displayed on screen, paper, or in other media. CSS saves a lot of work. It can control the layout of multiple web pages all at once. CSS can be added to HTML elements in 3 ways: •Inline - by using the style attribute in HTML elements •Embedded /Internal - by using a <style> element in the <head> section •External - by using an external CSS file The most common way to add CSS, is to keep the styles in separate CSS files.
- 3. ADVANTAGES OF CSS 1. Saves time: Write once and reuse the same sheet in multiple HTML pages. 2. Pages load faster: No need to write HTML tag attributes every time by writing CSS rule of a tag and apply it to all the occurrences of that tag. 3. Easy maintenance: Global changes can be done easily. 4. Superior styles to HTML: Has wider array of attributes. 5. Multiple device compatibility: Allow content to be optimized for more than one type of device. 6. Global web standards: HTML attributes are recommended to use CSS. 7. Offline browsing: Cache ensures faster loading and better overall performance. 8. Platform Independence: Supports all browsers.
- 4. STYLE RULE PARTS Selector: A selector is an HTML tag at which a style will be applied. This could be any tag like <h1> or <table> etc. Property: A property is a type of attribute of HTML tag. All the HTML attributes are converted into CSS properties. They could be color, border, etc. Value: Values are assigned to properties. CSS Style Rule Syntax:- selector { property : value }
- 5. INLINE CSS An inline CSS is used to apply a unique style to a single HTML element. An inline CSS uses the style attribute of an HTML element. This example sets the text color of the <h1> element to blue:
- 6. INTERNAL CSS An internal CSS is used to define a style for a single HTML page. An internal CSS is defined in the <head> section of an HTML page, within a <style> element:
- 7. EXTERNAL CSS An external style sheet is used to define the style for many HTML pages. With an external style sheet, you can change the look of an entire web site, by changing one file! To use an external style sheet, add a link to it in the <head> section of the HTML page:
- 8. An external style sheet can be written in any text editor. The file must not contain any HTML code, and must be saved with a .css extension. Here is how the "styles.css" looks:
- 9. CSS FONTS The CSS color property defines the text color to be used. The CSS font-family property defines the font to be used. The CSS font-size property defines the text size to be used.
- 10. CSS BORDER The CSS border property defines a border around an HTML element:
- 11. CSS PADDING The CSS padding property defines a padding (space) between the text and the border:
- 12. CSS MARGIN The CSS margin property defines a margin (space) outside the border:
- 13. ID ATTRIBUTE To define a specific style for one special element, add an id attribute to the element:
- 14. CLASS ATTRIBUTE To define a style for a special type of elements, add a class attribute to the element:
- 16. THANK YOU