What are the new features of html5 and css3

New features of html5: 1. Semantic tags; 2. Form enhancement; 3. Video and audio support; 4. Canvas drawing; 5. Offline storage; 6. Geolocation; 7. Drag and drop support. New features of css3: 1. Border rounded corners; 2. Shadow; 3. Gradient; 4. Animation and transition; 5. Text decoration; 6. Multi-column layout; 7. Flexible box layout; 8. Grid layout. HTML5 and CSS3 introduce many new features that allow developers to create richer, dynamic and interactive web pages.

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

HTML5 and CSS3 introduce many new features that allow developers to create richer, dynamic and interactive web pages. The following are some new features of HTML5 and CSS3:

New features of HTML5:

1. Semantic tags: HTML5 introduces many new features Semantic tags, such as

,

,

,

, etc. These tags help describe the structure and content of a web page more clearly, improving readability and search engine optimization.

2. Form enhancement: HTML5 introduces many new attributes and types for form elements, such as placeholder, required, pattern, autofocus, etc., as well as email, url, number, range, date Wait for the input type. This makes form validation and interaction much simpler and more powerful.

3. Video and audio support: HTML5 provides built-in video and audio support, such as

4. Canvas drawing: HTML5 introduces the tag and the corresponding API, which can use JavaScript to draw two-dimensional graphics on the web page. Through JavaScript API, dynamic graphics drawing and animation effects can be achieved.

5. Offline storage: HTML5 provides offline storage functions, such as Web Storage (including localStorage and sessionStorage) and IndexedDB API. These features can make web applications still available offline and improve user experience.

6. Geolocation: HTML5's Geolocation API allows web applications to obtain the user's geographical location information (user authorization is required). This helps enable location-based services and features such as navigation, nearby searches, and more.

7. Drag and drop support: HTML5’s Drag and Drop API makes it easier to implement drag and drop operations on web pages. By writing appropriate event handling functions, rich drag-and-drop interactions and functionality can be achieved.

New features of CSS3:

1. Border-radius: CSS3 adds the border-radius attribute, which can be easily Sets the corners of an element to rounded corners.

2. Box-shadow: CSS3 allows developers to add shadow effects to elements, thereby increasing the visual layering of elements.

3. Gradients: CSS3 supports linear gradients and radial gradients, allowing developers to create smooth color transition effects on elements.

4. Animations and transitions: CSS3 supports keyframe animation and transition effects, allowing developers to create complex dynamic effects on web pages.

5. Text-decoration: CSS3 adds new text decoration properties, such as text-shadow and text-overflow, which can create richer text effects.

6. Multicolumn layouts: CSS3 allows developers to distribute text in multiple columns, similar to traditional newspaper layout.

7. Flexible box layout (flexbox): CSS3 introduces the flexible box layout model, which can easily adjust the alignment, direction and order of elements.

8. Grid layout: CSS3 provides a grid layout model, making it easier for developers to arrange elements into complex two-dimensional grids.

These new features allow developers to create web pages and applications more quickly and efficiently, while providing more visual effects and interaction methods to improve user experience.

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