/**
 * 调用一个浏览器下载一个 File 或者 Blob 或者链接
 * @param file
 * @param name
 */
export function downloadFile(file: File | Blob | string, name?: string) {
    if (typeof file === "string") {
        let a = document.createElement("a")
        if (name) a.download = name
        a.rel = "noopener"
        a.href = file
        setTimeout(() => {
            a.click()
        }, 0)
    } else {
        const URL = window.URL || <URL>(<any>window).webkitURL

        let a = document.createElement("a")
        let fileName: string = name ? name : (<File>file).name
        a.download = fileName
        a.rel = "noopener"
        a.href = URL.createObjectURL(file)

        // 40s 后回收 ObjectURL
        setTimeout(() => {
            URL.revokeObjectURL(a.href)
            ;(a as any) = null
        }, 40000)

        setTimeout(() => {
            a.click()
        }, 0)

        return a.href
    }
}