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HTML canvas quadraticCurveTo() 方法
tryhtml5_canvas_quadraticcurveto
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<!DOCTYPE html> <html> <body> <h1>HTML5 Canvas</h1> <h2>The quadraticCurveTo() Method</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.beginPath(); ctx.moveTo(20, 20); ctx.quadraticCurveTo(20, 100, 200, 20); ctx.stroke(); </script> </body> </html>