如何使用javascript将旋转的图像保存在本地下载文件夹中

var canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;

var ctx = canvas.getContext('2d');
ctx.drawImage(image, 0, 0);

var angle = 45; // 旋转角度为45度
ctx.rotate(angle * Math.PI / 180);

var dataURL = canvas.toDataURL('image/png');
var link = document.createElement('a');
link.href = dataURL;
link.download = 'rotated_image.png';
link.click();

var image = document.getElementById('image'); // 获取图像元素

var canvas = document.createElement('canvas');
canvas.width = image.width;
canvas.height = image.height;

var ctx = canvas.getContext('2d');
ctx.drawImage(image, 0, 0);

var angle = 45; // 旋转角度为45度
ctx.rotate(angle * Math.PI / 180);

var dataURL = canvas.toDataURL('image/png');
var link = document.createElement('a');
link.href = dataURL;
link.download = 'rotated_image.png';
link.click();