【Canvas】線性漸變色例子-垂直方向漸變
阿新 • • 發佈:2022-01-09
<!DOCTYPE html> <html lang="utf-8"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <head> <title>線性漸變色例子-垂直方向漸變</title> </head> <body onload="draw()"> <canvas id="myCanvus" width="400px" height="400px" style="border:1px dashed black;"> 出現文字表示你的瀏覽器不支援HTML5 </canvas> </body> </html> <script type="text/javascript"> <!-- function draw(){ var canvas=document.getElementById('myCanvus'); canvas.width=400; canvas.height=400; var ctx=canvas.getContext('2d'); ctx.translate(200,200); // 從上到下垂直漸變,注意之前有平移 var linegrad=ctx.createLinearGradient(0,-200,0,200); linegrad.addColorStop(0,"white");// 白色 linegrad.addColorStop(1,"navy");// 海藍 ctx.fillStyle=linegrad; ctx.fillRect(-200,-200,400,400); }; //--> </script>
效果:
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