JavaScript Code復(fù)制內(nèi)容到剪貼板
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="UTF-8">
- <title></title>
- </head>
- <body onload="draw(),drawarc()">
- <!--繪制的步驟：獲取canvas元素->取得上下文->填充與繪制邊框->設(shè)定繪圖樣式-->
- <!--繪制其他復(fù)雜圖形需要使用路徑：開始創(chuàng)建路徑->創(chuàng)建圖形路徑->關(guān)閉路徑->繪制圖形-->
- <!--eg:繪制矩形-->
- 繪制矩形:<canvas id="ca"></canvas><br />
- 繪制圓形：<canvas id="yuan"></canvas>
- </body>
- </html>
- <script>
-
- function draw(){
- var canvas=document.getElementById('ca');
- if (canvas==null)
- return false;
- var context=canvas.getContext('2d');
- context.fillStyle='#EEEFF';
- context.fillRect(0,0,400,300);
- context.fillStyle='red';
- context.strokeStyle='blue';
- context.lineWidth=1;
- context.fillRect(50,50,100,100);
- context.strokeRect(50,50,100,100);
-
- }
-
- function drawarc(){
- var canvas2=document.getElementById('yuan');
- if (canvas2==null)
- if(canvas2==null)
- return false;
- var context2=canvas2.getContext('2d');
- context2.fillStyle='#EEEEEF';
- context2.fillRect(0,0,400,300);
- var n=0;
- for(var i=0;i<10;i++){
- context2.beginPath();
- context2.arc(i*25,i*25,i*10,0,Math.PI*2,true);
- context2.closePath();
- context2.fillStyle='Rgba(255,0,0,0.25)';
- context2.fill();
- }
- }
-
-
- </script>
