HTML5 API 教程

HTML5 提供了一系列新的 API，使得网页开发更加灵活和强大。以下是一些基础的 HTML5 API 教程：

Canvas API：用于在网页上绘制图形。
Geolocation API：获取用户的地理位置信息。
Web Storage API：提供一种在客户端存储数据的方式。
Web Workers API：允许运行脚本操作而不影响页面性能。

Canvas API 教程

Canvas API 允许你使用 JavaScript 在网页上绘制图形。以下是一个简单的例子：

var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#FF0000';
ctx.fillRect(0, 0, 150, 150);

Geolocation API 教程

Geolocation API 允许你获取用户的地理位置信息。以下是一个简单的例子：

if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(function(position) {
    var lat = position.coords.latitude;
    var lon = position.coords.longitude;
    console.log('Latitude: ' + lat + ', Longitude: ' + lon);
  });
} else {
  console.log('Geolocation is not supported by this browser.');
}

Web Storage API 教程

Web Storage API 提供了一种在客户端存储数据的方式。以下是一个简单的例子：

// 设置数据
localStorage.setItem('key', 'value');

// 获取数据
var value = localStorage.getItem('key');

// 删除数据
localStorage.removeItem('key');

扩展阅读

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# HTML5 API Tutorials

HTML5 provides a set of new APIs that make web development more flexible and powerful. Here are some basic HTML5 API tutorials:

- **Canvas API**: Used to draw graphics on the web page.
- **Geolocation API**: Get the user's location information.
- **Web Storage API**: Provides a way to store data on the client side.
- **Web Workers API**: Allows running scripts without affecting the page performance.

## Canvas API Tutorial

The Canvas API allows you to draw graphics on the web page using JavaScript. Here's a simple example:

```javascript
var canvas = document.getElementById('myCanvas');
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#FF0000';
ctx.fillRect(0, 0, 150, 150);

Geolocation API Tutorial

The Geolocation API allows you to get the user's location information. Here's a simple example:

if (navigator.geolocation) {
  navigator.geolocation.getCurrentPosition(function(position) {
    var lat = position.coords.latitude;
    var lon = position.coords.longitude;
    console.log('Latitude: ' + lat + ', Longitude: ' + lon);
  });
} else {
  console.log('Geolocation is not supported by this browser.');
}

Web Storage API Tutorial

The Web Storage API provides a way to store data on the client side. Here's a simple example:

// Set data
localStorage.setItem('key', 'value');

// Get data
var value = localStorage.getItem('key');

// Remove data
localStorage.removeItem('key');