FileSaver.js fix: download file on SamsungBrowser with block auto download (fixes #660)

SamsungBrowser has a settings enabled by default called "Block automatic downloads" that basically blocks all downloads that are not initiated by user interaction, thus making the call setTimeout(function () { click(a) }, 0) impossible to download a file on this browser, only if the user disables the settings option.

By checking the user agent for SamsungBrowser and calling click(a) instead of setTimeout(function () { click(a) }, 0) the function saveAs work as expected when called from an event initiated by the user. (button click)

Tested on SamsungBrowser 12.0.1.47 with a Smasung S6 SM-G920I.

Code used to test:

<html>
    <head>
        <script src="FileSaver.min.js"></script>
    </head>

    <body>
        <button onclick="download()">download</button>
        <script>
            var testCsv = "this,is,a,row\nthis,is,another,row";
            function download() {
                var blob = new Blob([testCsv], { type: 'text/csv;charset=utf-8;' });
                saveAs(blob, "test.csv")
            }
        </script>
    </body>
</html>

Fixes #660

Jul 11 '20 11:07 hudovisk

Pardon my question, but what is the purpose of the setTimeout with 0 milliseconds in the original code anyway?

Oct 30 '20 15:10 lattam

Hello any update on this? will this be released yet? Also does this really fix it? I guess not I have tried something similar locally and same result it fails to download while block automatic downloads is on.

May 03 '23 09:05 MoeHamdan

This needs to change to use window.open which works with Samsung Browser.. window.open(blob) though the file name will be lost but it will work.

May 04 '23 07:05 MoeHamdan