Skip to content

sladex/FileSaver.js

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

97 Commits
 
 
 
 
 
 
 
 
 
 

Repository files navigation

FileSaver.js

FileSaver.js implements the HTML5 W3C saveAs() FileSaver interface in browsers that do not natively support it. There is a FileSaver.js demo that demonstrates saving various media types.

FileSaver.js is the solution to saving files on the client-side, and is perfect for webapps that need to generate files, or for saving sensitive information that shouldn't be sent to an external server.

Looking for canvas.toBlob() for saving canvases? Check out canvas-toBlob.js for a cross-browser implementation.

Supported Browsers

Browser Constructs as Filenames Max Blob Size Dependencies
Firefox 20+ Blob Yes 800MiB None
Firefox ≤ 19 data: URI No n/a Blob.js
Chrome Blob Yes 345MiB None
Chrome for Android Blob Yes ? None
IE 10+ Blob Yes 600MiB None
Opera Next Blob Yes ? None
Opera < 15 data: URI No n/a Blob.js
Safari 6.1+* Blob No ? None
Safari < 6 data: URI No n/a Blob.js

Feature detection is possible:

try { var isFileSaverSupported = !!new Blob(); } catch(e){}

IE < 10

It is possible to save HTML documents (and only HTML documents) in IE < 10 without Flash-based polyfills. See sudodoki's comment for more information on how to accomplish this.

Safari 6.1+

Blobs may be opened instead of saved sometimes—you may have to direct your Safari users to manually press +S to save the file after it is opened. Further information is available on the issue tracker.

Syntax

FileSaver saveAs(in Blob data, in DOMString filename)

Examples

Saving text

var blob = new Blob(["Hello, world!"], {type: "text/plain;charset=utf-8"});
saveAs(blob, "hello world.txt");

The standard W3C File API Blob interface is not available in all browsers. Blob.js is a cross-browser Blob implementation that solves this.

Saving a canvas

var canvas = document.getElementById("my-canvas"), ctx = canvas.getContext("2d");
// draw to canvas...
canvas.toBlob(function(blob) {
    saveAs(blob, "pretty image.png");
});

Note: The standard HTML5 canvas.toBlob() method is not available in all browsers. canvas-toBlob.js is a cross-browser canvas.toBlob() that polyfills this.

Aborting a save

var filesaver = saveAs(blob, "whatever");
cancel_button.addEventListener("click", function() {
    if (filesaver.abort) {
        filesaver.abort();
    }
}, false);

This is only useful when you're saving very large files (e.g. generated video).

Tracking image

Releases

No releases published

Packages

No packages published