要在HTML 5中居中画布，请在div标签中包含canvas标签。然后我们可以居中对齐div标签。通过这样做，画布也会居中对齐。
例子
<!DOCTYPE html>.
<html>
<body>
<div style = "text-align:center;">
<canvas style = "background-color:GREEN;">This is my canvas</canvas>
</div>
</body>
</html>