✨canvas snapshot

💈範例

// create <img> element
let img = document.createElement("img");

// save canvas content as PNG (encoded as string using "data:URL")
img.src = canvas.toDataURL();

// append to DOM
document.body.appendChild(img); //documentja

📗 參考

• JavaScript: The Definitive Guide (15.8 Graphics in a <canvas>)

📘 手冊

• HTMLCanvasElement ⟩ .toDataURL()