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HTML5基础教程
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<canvas id="ex2" width="500" height="125" style="border: 1px solid #cccccc;"> HTML5 Canvas not supported </canvas> <script> var canvas = document.getElementById("ex2"); var context = canvas.getContext("2d"); var linearGradient1 = context.createLinearGradient(0,0,100,0); //horizontal gradient linearGradient1.addColorStop(0 , 'rgb(255, 0, 0)'); linearGradient1.addColorStop(0.5, 'rgb( 0, 0, 255)'); linearGradient1.addColorStop(1 , 'rgb( 0, 0, 0)'); context.fillStyle = linearGradient1; context.fillRect(10,10,100, 100); var linearGradient2 = context.createLinearGradient(125,0, 225,0); //horizontal gradient linearGradient2.addColorStop(0 , 'rgb(255, 0, 0)'); linearGradient2.addColorStop(0.5, 'rgb( 0, 0, 255)'); linearGradient2.addColorStop(1 , 'rgb( 0, 0, 0)'); context.strokeStyle = linearGradient2; context.strokeRect(125, 10, 100, 100); </script>
运行结果
