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<!DOCTYPE html> <html> <body> <h1>globalCompositeOperation = "luminosity"</h1> <p>The "luminosity" value adopts the luma of the top layer and preserves the hue and chroma of the bottom layer.</p> <canvas id="myCanvas" width="300" height="150" style="border:1px solid grey"> Sorry, your browser does not support canvas. </canvas> <script> const canvas = document.getElementById("myCanvas"); const ctx = canvas.getContext("2d"); // Set type of compositing ctx.globalCompositeOperation = "luminosity"; // Draw two overlapping rectangles ctx.fillStyle = "blue"; ctx.fillRect(10, 10, 100, 100); ctx.fillStyle = "red"; ctx.fillRect(40, 40, 100, 100); </script> </body> </html>
