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                            ## Canvas描邊與填充

~~~
ctx.moveTo(0,0);
ctx.lineTo(100,100);
ctx.lineTo(100,200);
ctx.fill();

//ctx.stroke();
~~~

> fill()把路徑閉合并填充路徑的內部區域，默認黑色
> stroke()描邊


~~~
ctx.moveTo(0,0);
ctx.lineTo(100,100);
ctx.lineTo(100,200);
ctx.closePath();
ctx.lineWidth=10;
ctx.strokeStyle="blue";
ctx.stroke();
ctx.fillStyle="rgba(0 ,255, 0 ,0.5)";
ctx.fill();
~~~


### 例子

~~~
ctx.strokeRect(300,100,200,100);
ctx.fillRect(300,100,200,100);

ctx.beginPath();
ctx.arc(200,200,50,0,2*Math.PI,true);
ctx.fillStyle="rgba(0 ,0, 255 ,0.5)";
ctx.fill();
~~~




                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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