前端如何实现PDF文件下载

// fileName可以在调用时传递进来，response是二进制格式
export function pdfDownload(fileName, response) {
    let blob = new Blob([response], {
        type: "application/pdf",
    });
    var downloadElement = document.createElement("a");
    var href = window.URL.createObjectURL(blob);
    downloadElement.href = href;
    downloadElement.download = fileName;
    document.body.appendChild(downloadElement);
    downloadElement.click();
    document.body.removeChild(downloadElement);
    window.URL.revokeObjectURL(href);
}