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                            [TOC]

## Canvas

### 快速入門模板

```
<canvas id="tutorial" width="300" height="300">你的瀏覽器不支持 canvas，請升級你的瀏覽器。</canvas>
<script type="text/javascript">
function draw(){
    var canvas = document.getElementById('tutorial');
    if(!canvas.getContext) return;
      /** * @type CanvasRenderingContext2D */
      var ctx = canvas.getContext("2d");
      //開始代碼
    
}
draw();
</script>
```


### 坐標空間
![](https://www.runoob.com/wp-content/uploads/2018/12/Canvas_default_grid.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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