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function getBlob(url, cb) { var xhr = new XMLHttpRequest() xhr.open("GET", url, true) xhr.responseType = "blob" xhr.onload = function() { if (xhr.status === 200) { cb(xhr.response) } } xhr.send() } function saveAs(blob, filename) { if (w***ob) { navigator.msSaveBlob(blob, filename) } else { var link = document.createElement("a") var body = document.querySelector("body") link.href = window.URL.createObjectURL(blob) link.download = filename // fix Firefox link.style.display = "none" body.appendChild(link) link.click() body.removeChild(link) window.URL.revokeObjectURL(link.href) } } function downloadPdf(url, filename) { getBlob(url, function(blob) { saveAs(blob, filename) }) }