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Support for downloading base64 files #9297

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Support for downloading base64 files #9297

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112a578
Support for downloading base64 files
flibbles Sep 19, 2025
a028a63
Added comment explaining why we'd use data urls over blobs
flibbles Sep 19, 2025
087555f
Using more modern string##includes method
flibbles Sep 30, 2025
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4 changes: 3 additions & 1 deletion core/modules/savers/download.js
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,9 @@ DownloadSaver.prototype.save = function(text,method,callback,options) {
}
// Set up the link
var link = document.createElement("a");
if(Blob !== undefined) {
// We prefer Blobs if they're available, unless we're dealing with a tiddler type declaring itself full of base64 encoded content.
// Then we use data urls, because browsers will know to decode the stream and download the actual binary file as intended.
if(Blob !== undefined && type.indexOf(";base64") < 0) {
var blob = new Blob([text], {type: type});
link.setAttribute("href", URL.createObjectURL(blob));
} else {
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