使用Javascript将base64图像保存到文件路径

function base64ToBlob(base64Data, contentType) {
  var byteCharacters = atob(base64Data);
  var byteArrays = [];

  for (var i = 0; i < byteCharacters.length; i++) {
    byteArrays.push(byteCharacters.charCodeAt(i));
  }

  var byteArray = new Uint8Array(byteArrays);
  return new Blob([byteArray], { type: contentType });
}

function saveBlobAsFile(blob, fileName) {
  var downloadLink = document.createElement("a");
  downloadLink.href = URL.createObjectURL(blob);
  downloadLink.download = fileName;
  downloadLink.click();
}

var base64Data = "base64图像数据";
var contentType = "image/png";
var fileName = "image.png";

var blob = base64ToBlob(base64Data, contentType);
saveBlobAsFile(blob, fileName);