<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>color</title> <style type="text/css"> *{ margin: 0; padding: 0; } #canvas{ background-color: #666666; /*opacity: 0.2;*/ } </style> </head> <body> <canvas id="canvas" width="600" height="300">Canvas not supported</canvas> <script type="text/javascript"> var canvas=document.getElementById(‘canvas‘); context=canvas.getContext(‘2d‘); var gradient=context.createLinearGradient(0,0,canvas.width,30); gradient.addColorStop(0,‘red‘); gradient.addColorStop(0.25,‘blue‘); gradient.addColorStop(0.5,‘black‘); gradient.addColorStop(0.75,‘yellow‘); gradient.addColorStop(1,‘green‘); context.fillStyle=gradient; context.fillRect(0,0,600,300); </script> </body> </html>
实际效果
时间: 2024-11-29 11:31:33