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<!DOCTYPE html> <html> <body> <h1>HTML5 Canvas</h1> <h2>The globalCompositeOperation Property</h2> <canvas id="myCanvas" width="300" height="150" style="border:1px solid grey"></canvas> <script> const c = document.getElementById("myCanvas"); const ctx = c.getContext("2d"); ctx.fillStyle = "red"; ctx.fillRect(20, 20, 75, 50); ctx.fillStyle = "blue"; ctx.globalCompositeOperation = "source-over"; ctx.fillRect(50, 50, 75, 50); ctx.fillStyle = "red"; ctx.fillRect(150, 20, 75, 50); ctx.fillStyle = "blue"; ctx.globalCompositeOperation = "destination-over"; ctx.fillRect(180, 50, 75, 50); </script> </body> </html>
