@writ/utils/download-iframe.js

My tool kit

'use strict';
// 无闪现下载excel
function download(url) {
    const iframe = document.createElement('iframe');
    iframe.style.display = 'none';
    function iframeLoad() {
        console.log('iframe onload');
        const win = iframe.contentWindow;
        const doc = win.document;
        if (win.location.href === url) {
            if (doc.body.childNodes.length > 0) {
                // response is error
            }
            iframe.parentNode.removeChild(iframe);
        }
    }
    if ('onload' in iframe) {
        iframe.onload = iframeLoad;
    } else if (iframe.attachEvent) {
        iframe.attachEvent('onload', iframeLoad);
    } else {
        iframe.onreadystatechange = function onreadystatechange() {
            if (iframe.readyState === 'complete') {
                iframeLoad();
            }
        };
    }
    iframe.src = '';
    document.body.appendChild(iframe);

    setTimeout(function loadUrl() {
        iframe.contentWindow.location.href = url;
    }, 50);
}