1.form表单

html

<form id="test" action="/download" method="get/post">

    <input type="hidden" name="data" value="">

    <button class="btn" type="submit">下载</button>

</form>

js

document.getElementById("sujia").value= ‘123’;

varform =document.getElementById('form');

form.submit();

2.iframe

html

<iframe name="download" class="download-iframe" style="display:none;"></iframe>

js

$('.download-iframe').on('load',function() {

    consterrorMsg = $(this.contentWindow.document).text();

    if(errorMsg){

        window.setTimeout(function() {

            dialog.error('下载文件失败，请联系管理员!');

        },400);

    }

});

window.open(`/download`,'download');

3. a标签

<a download="b" href="/download">下载</a>

js

var isSupportDownload = 'download' in document.createElement('a');

下载后文件重命名为b，由于兼容问题可以先尝试，是否支持