如何在不保存的情况下将小部件画布(纹理)转换为.png？

// 获取小部件画布
const canvas = document.getElementById('widgetCanvas');

// 将画布转换为Base64编码的图像数据
const imageData = canvas.toDataURL('image/png');

// 解码Base64编码的图像数据为二进制数据
const binaryDataString = atob(imageData.split(',')[1]);
const binaryData = new Uint8Array(binaryDataString.length);
for (let i = 0; i < binaryDataString.length; i++) {
  binaryData[i] = binaryDataString.charCodeAt(i);
}

// 将二进制数据转换为Blob对象
const blob = new Blob([binaryData], { type: 'image/png' });

// 创建下载链接
const downloadLink = document.createElement('a');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'widget.png';

// 触发下载
downloadLink.click();