CanvasRenderingContext2D: bezierCurveTo() method

bezierCurveTo(cp1x, cp1y, cp2x, cp2y, x, y)

<canvas id="canvas"></canvas>

// Define canvas and context
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");

// Define the points as {x, y}
let start = { x: 50, y: 20 };
let cp1 = { x: 230, y: 30 };
let cp2 = { x: 150, y: 80 };
let end = { x: 250, y: 100 };

// Cubic Bézier curve
ctx.beginPath();
ctx.moveTo(start.x, start.y);
ctx.bezierCurveTo(cp1.x, cp1.y, cp2.x, cp2.y, end.x, end.y);
ctx.stroke();

// Start and end points
ctx.fillStyle = "blue";
ctx.beginPath();
ctx.arc(start.x, start.y, 5, 0, 2 * Math.PI); // Start point
ctx.arc(end.x, end.y, 5, 0, 2 * Math.PI); // End point
ctx.fill();

// Control points
ctx.fillStyle = "red";
ctx.beginPath();
ctx.arc(cp1.x, cp1.y, 5, 0, 2 * Math.PI); // Control point one
ctx.arc(cp2.x, cp2.y, 5, 0, 2 * Math.PI); // Control point two
ctx.fill();

<canvas id="canvas"></canvas>

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");

ctx.beginPath();
ctx.moveTo(30, 30);
ctx.bezierCurveTo(120, 160, 180, 10, 220, 140);
ctx.stroke();