What are the new features of css3

The new features of css3 include selectors, box models, colors, backgrounds, borders and shadows, text effects, layout and fluid layout, multi-column layout, animations and transitions, responsive design, etc. Detailed introduction: 1. Selectors, attribute selectors, pseudo-class selectors, pseudo-element selectors and multiple selectors; 2. Box model, the Box-sizing property changes the default CSS box model to make it easier to layout; 3. Color, CSS3 adds support for transparency, use rgba(), hsla() or opacity to set it, etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

CSS3 is the latest evolution of CSS technology, which introduces many new features to enhance the design capabilities of designers and developers. The following are some new features of CSS3:

1. Selectors:

   • Attribute selectors: Select elements with specific attributes, such as [attr=value].
   • Pseudo-class selector: Add styles to elements in specific states, such as :hover, :active, :visited.
   • Pseudo element selector: Select a specific part of elements, such as ::before, ::after.
   • Multiple selectors: Use commas to separate multiple elements at the same time, such as element1, element2.

2. Box Model: The Box-sizing property changes the default CSS box model to make it easier to lay out.

3. Color:

   • CSS3 adds support for transparency, use rgba(), hsla() or opacity to set.
   • CSS3 provides new color spaces such as RGBA, HSL, and HSLA.

4. Background:

   • background-size: Allows you to change the size of the background image.
   • background-repeat: Enables you to change the repeating behavior of the background image.
   • background-position: Allows you to move the background image horizontally and vertically.
   • background-image: Allows multiple background images to be used at the same time.

5. Borders and shadows:

   • border-radius: Add rounded corners to the border.
   • box-shadow: Add a shadow effect to the element.

6. Text effect:

   • text-shadow: Add a shadow effect to the text.
   • text-overflow: Handle the display mode of overflow text.

7. Layout and fluid layout:

   • Flexbox: CSS3’s new layout model for one-dimensional layout.
   • Grid: CSS3 new layout model for 2D layout.

8. Multi-column Layout: CSS3 provides a way to create multiple columns of text or layout, similar to newspaper layout.

9. Animations and Transitions: CSS3 supports keyframe animation and transition effects for creating dynamic effects in CSS. Animation can be controlled through the transition and animation properties.

10. Responsive Design (Responsive Design): CSS3 provides some features, such as media queries (Media Queries), allowing developers to create designs that display well on different devices and screen sizes. Responsive web design.

11. Other features:

    • CSS3 adds support for SVG images.
    • CSS3 provides a new way to define fonts (@font-face).
    • CSS3 supports custom pseudo-elements (for example, ::before and ::after).
    • CSS3 supports more complex CSS selectors, such as child selectors, adjacent sibling selectors, etc.
    • CSS3 supports outline (outline) and inner outline (outline-offset) properties, which are very useful when highlighting elements.
    • CSS3 supports linear gradients and radial gradients.
    • CSS3 supports drawing graphics directly on the page, such as rectangles, circles, ellipses, etc. This is achieved by using the canvas element and JavaScript.
    • CSS3 supports generating complex styles of fonts, including font decorations such as superscript, subscript, etc.

12. New attributes that appeared in HTML5 are also supported in CSS3, such as video, audio, placeholder, input-type-radio, input-type-checkbox, input- type-number, input-type-range, input-type-date, input-type-time, input-type-datetime, input-type-month, input-type-week, input-type-email, input-type- search, input-type-tel, input-type-color, progress, meter, fieldset, output, keygen, datalist, command, map, area, track, wbr, etc. These new attributes enable HTML5 to better support new web applications and new user needs.

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