https://github.com/scottjehl/picturefill

A responsive image polyfill for <picture>, srcset, sizes, and more
https://github.com/scottjehl/picturefill

Last synced: about 2 months ago
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A responsive image polyfill for <picture>, srcset, sizes, and more

• Host: GitHub
• URL: https://github.com/scottjehl/picturefill
• Owner: scottjehl
• License: mit
• Archived: true
• Created: 2012-02-21T08:35:14.000Z (over 12 years ago)
• Default Branch: master
• Last Pushed: 2022-09-06T15:00:20.000Z (about 2 years ago)
• Last Synced: 2024-04-13T22:19:46.613Z (5 months ago)
• Language: JavaScript
• Homepage: http://scottjehl.github.com/picturefill/
• Size: 16.7 MB
• Stars: 9,927
• Watchers: 347
• Forks: 1,078
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-javascript - picturefill - A responsive image polyfill for &lt;picture&gt;, srcset, sizes, and more - ★ 9786 (Misc)

README

        
# Picturefill

A [responsive image](http://www.whatwg.org/specs/web-apps/current-work/multipage/embedded-content.html#embedded-content) polyfill.

* Authors: See [Authors.txt](https://raw.githubusercontent.com/scottjehl/picturefill/master/Authors.txt)

* License: MIT

## This project is archived and deprecated! 

At the time, it helped us transition to responsive image HTML patterns until browsers supported them. Support and fallback strategies are now very good, and this project is no longer needed or recommended. Thanks everyone!`

[![build-status](https://api.travis-ci.org/scottjehl/picturefill.svg)](https://travis-ci.org/scottjehl/picturefill) [](https://pf-slackin.herokuapp.com/) [![picturefill on npm](https://img.shields.io/npm/v/picturefill.svg?style=flat)](https://www.npmjs.com/package/picturefill)

Picturefill has three versions:

* Version 1 mimics the Picture element pattern with `span` elements. It is no longer maintained.

* Version 2 is a lightweight polyfill of the [Picture element draft specification](http://www.whatwg.org/specs/web-apps/current-work/multipage/embedded-content.html#embedded-content).

* Version 3.0.3 is the current stable release.

## Usage, Demos, Docs

To find out how to use Picturefill, visit the [project site](http://scottjehl.github.io/picturefill/).

## The gotchas

Be it browser issues, the responsive images specifications, or Picturefill itself, there are a couple gotchas you should be aware of when working with Picturefill:

- Firefox 38 and 39 has some bugs [[1]](https://bugzilla.mozilla.org/show_bug.cgi?id=1139560) [[2]](https://bugzilla.mozilla.org/show_bug.cgi?id=1139554) [[3]](https://bugzilla.mozilla.org/show_bug.cgi?id=1135812) where images won't update on screen resize. These issues are addressed by Picturefill 3.0.0, and was fixed in Firefox 41.

- Per the `picture` spec, using `%` _isn't_ allowed in the `sizes` attribute. Using `%` will fallback to `100vw`.

- Trying to use the `src` attribute in a browser that _doesn't_ support `picture` natively can result in a double download. To avoid this, don't use the `src` attribute on the `img` tag:

```html

    

    

```

- If you only want to have an image show up at certain sizes, and not show up at others, you will need to use a transparent placeholder gif:

```html

    

    

```

## Contributing

For information on how to contribute code to Picturefill, check out [`CONTRIBUTING.md`](CONTRIBUTING.md)

## Issues

If you find a bug in Picturefill, please add it to [the issue tracker](https://github.com/scottjehl/picturefill/issues)

## Discussion

Picturefill discussion takes place via Slack. For an invitation, visit [https://pf-slackin.herokuapp.com/](https://pf-slackin.herokuapp.com/)

## Support

There are currently no known unsupported browsers, provided that you use the markup patterns provided.