注意:并非所有浏览器都支持。

我正在寻找一种方法，使用jquery下载文件，而不必从一开始就在href属性中设置文件url。

jQuery (< / >, { id:“downloadFile”, href:“http://cdn.sstatic.net/Sites/stackoverflow/img/apple-touch-icon@2.png”, 风格:“显示:隐藏。” 下载:“ }) .appendTo(身体的); $ (" # downloadFile ") [0] .click (); < script src = " https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js " > < /脚本>

let args = {"data":htmlData,"filename":exampleName}

创建HTMl文件并下载

window.downloadHTML = function(args) {
var data, filename, link;
var csv = args.data;
if (csv == null) return;
filename = args.filename || 'report.html';
data = 'data:text/html;charset=utf-8,' + encodeURIComponent(csv);
console.log(data);
link = document.createElement('a');
link.setAttribute('href', data);
link.setAttribute('download', filename);
document.body.appendChild(link);
link.click();
document.body.removeChild(link);}

创建并下载CSV文件

window.downloadCSV = function(args) {
var data, filename, link;
var csv = args.data;
if (csv == null) return;
filename = args.filename || 'report.csv';
if (!csv.match(/^data:text\/csv/i)) {
    csv = 'data:text/csv;charset=utf-8,' + csv;
}
data = encodeURI(csv);
link = document.createElement('a');
link.setAttribute('href', data);
link.setAttribute('download', filename);
document.body.appendChild(link);
link.click();
document.body.removeChild(link);

}

我很惊讶没有很多人知道元素的下载属性。请帮助传播这个消息!你可以有一个隐藏的html链接，假装点击它。如果html链接具有下载属性，它将下载文件，而不是查看文件，无论如何。这是代码。如果能找到猫的图片，它就会下载。

. getelementbyid(“下载”).click (); <a href="https://docs.google.com/uc?id=0B0jH18Lft7ypSmRjdWg1c082Y2M" download id="download" hidden></a>

注意: 并非所有浏览器都支持:http://www.w3schools.com/tags/att_a_download.asp

为了改进Imagine Breaker的答案，FF和IE支持:

var evt = document.createEvent("MouseEvents");
evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);

function downloadURI(uri, name) {
    var link = document.createElement("a");
    link.download = name;
    link.href = uri;
    link.dispatchEvent(evt);
}

换句话说，只需使用dispatchEvent函数而不是click();

hitesh在2013年12月30日提交的答案实际上是有效的。只是需要一点点调整:

PHP文件可以调用自己。换句话说，只需创建一个名为saveass .php的文件，并将此代码放入其中…

        <a href="saveAs.php?file_source=YourDataFile.pdf">Download pdf here</a>

    <?php
        if (isset($_GET['file_source'])) {
            $fullPath = $_GET['file_source'];
            if($fullPath) {
                $fsize = filesize($fullPath);
                $path_parts = pathinfo($fullPath);
                $ext = strtolower($path_parts["extension"]);
                switch ($ext) {
                    case "pdf":
                    header("Content-Disposition: attachment; filename=\"".$path_parts["basename"]."\""); // use 'attachment' to force a download
                    header("Content-type: application/pdf"); // add here more headers for diff. extensions
                    break;
                    default;
                    header("Content-type: application/octet-stream");
                    header("Content-Disposition: filename=\"".$path_parts["basename"]."\"");
                }
                if($fsize) {//checking if file size exist
                  header("Content-length: $fsize");
                }
                readfile($fullPath);
                exit;
            }
        }
    ?>

这些函数在stacktrace.js中使用:

/**
 * Try XHR methods in order and store XHR factory.
 *
 * @return <Function> XHR function or equivalent
 */
var createXMLHTTPObject = function() {
    var xmlhttp, XMLHttpFactories = [
        function() {
            return new XMLHttpRequest();
        }, function() {
            return new ActiveXObject('Msxml2.XMLHTTP');
        }, function() {
            return new ActiveXObject('Msxml3.XMLHTTP');
        }, function() {
            return new ActiveXObject('Microsoft.XMLHTTP');
        }
    ];
    for (var i = 0; i < XMLHttpFactories.length; i++) {
        try {
            xmlhttp = XMLHttpFactories[i]();
            // Use memoization to cache the factory
            createXMLHTTPObject = XMLHttpFactories[i];
            return xmlhttp;
        } catch (e) {
        }
    }
}

/**
 * @return the text from a given URL
 */
function ajax(url) {
    var req = createXMLHTTPObject();
    if (req) {
        try {
            req.open('GET', url, false);
            req.send(null);
            return req.responseText;
        } catch (e) {
        }
    }
    return '';
}