downloadjs浏览器下载文件

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npm install downloadjs

import download from "downloadjs"
download(fileUrl, fileName);

自己实现了类似的效果

function download(fileUrl,) {
    const request = new XMLHttpRequest()
    request.open('get', fileUrl)
    request.responseType = 'blob'
    request.onreadystatechange = (res) => {
        if (res.currentTarget.readyState == 4 && res.currentTarget.status == 200) {
            const url = window.URL.createObjectURL(res.currentTarget.response)
            const link = document.createElement('a')
            link.href = url
            link.setAttribute('download', fileName ? fileName : new Date().getTime())
            document.body.appendChild(link)
            link.click()
            document.body.removeChild(link)
        }
    }
    request.send()
}

如果下载的文件报跨域，就用​​a标签​​下载

function downloadFile(fileUrl,) {
    let a = document.createElement('a');
    a.href = fileUrl;
    a.download = fileName ? fileName : new Date().getTime();
    a.click();
}