js 下载文件

export const downFilePromise = (fileName, content, fileType) => {
    let fileContent = new Blob([content], {type: fileType})
    let url = window.URL.createObjectURL(fileContent)
    let link = document.createElement('a')
    link.style.display = 'none'
    link.href = url
    link.setAttribute('download', fileName)
    document.body.appendChild(link)
    link.click()
}