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Contact Support at https://www.npmjs.com/support for more info."}},"readme":"# Picturefill\nA [responsive image](http://www.whatwg.org/specs/web-apps/current-work/multipage/embedded-content.html#embedded-content) polyfill.\n* Authors: See [Authors.txt](https://raw.githubusercontent.com/scottjehl/picturefill/master/Authors.txt)\n* License: MIT\n\n[![build-status](https://api.travis-ci.org/scottjehl/picturefill.svg)](https://travis-ci.org/scottjehl/picturefill) [<img src=\"https://pf-slackin.herokuapp.com/badge.svg\" alt=\"Join Slack channel\">](https://pf-slackin.herokuapp.com/) [![picturefill on npm](https://img.shields.io/npm/v/picturefill.svg?style=flat)](https://www.npmjs.com/package/picturefill)\n\nPicturefill has three versions:\n\n* Version 1 mimics the Picture element pattern with `span` elements. It is no longer maintained.\n* Version 2 is a lightweight polyfill of the [Picture element draft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).\n* Version 3.0.3 is the current stable release.\n\n## Usage, Demos, Docs\nTo find out how to use Picturefill, visit the [project site](http://scottjehl.github.com/picturefill/).\n\n## The gotchas\nBe it browser issues, the responsive images specifications, or Picturefill itself, there are a couple gotchas you should be aware of when working with Picturefill:\n\n- 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.\n\n- Per the `picture` spec, using `%` _isn't_ allowed in the `sizes` attribute. Using `%` will fallback to `100vw`.\n\n- 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:\n\n```html\n<picture>\n    <source srcset=\"../img/sample.svg\" media=\"(min-width: 768px)\" />\n    <img srcset=\"default.png\" alt=\"Sample pic\" />\n</picture>\n```\n\n- 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:\n\n```html\n<picture>\n    <source srcset=\"../img/sample.svg\" media=\"(min-width: 768px)\" />\n    <img srcset=\"data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\"\n        alt=\"Sample pic\" />\n</picture>\n```\n\n## Contributing\nFor information on how to contribute code to Picturefill, check out [`CONTRIBUTING.md`](CONTRIBUTING.md)\n\n## Issues\nIf you find a bug in Picturefill, please add it to [the issue tracker](https://github.com/scottjehl/picturefill/issues)\n\n## Discussion\nPicturefill discussion takes place via Slack. For an invitation, visit [https://pf-slackin.herokuapp.com/](https://pf-slackin.herokuapp.com/)\n\n## Support\nThere are currently no known unsupported browsers, provided that you use the markup patterns provided.\n","_attachments":{},"homepage":"https://scottjehl.github.io/picturefill/","bugs":{"url":"https://github.com/scottjehl/picturefill/issues"},"license":"MIT"}