🗻 Polyfill object-fit/object-position on <img>: IE9, IE10, IE11, Edge, Safari, ...

• Fast and lightweight (demo)
• No additional elements are created
• Setup is done via CSS
• Scaling is taken care by the browser (it uses background-size)
• srcset support
• src and srcset properties and attributes keep working: img.src = 'other-image.jpg'

You will need 3 things

1. one or more <img> elements with src or srcset

   <img class='your-favorite-image' src='image.jpg'>

2. CSS defining object-fit and a special font-family property to allow IE to read the correct value

   .your-favorite-image {
   	object-fit: contain;
   	font-family: 'object-fit: contain;';
   }

   or, if you also need object-position

   .your-favorite-image {
   	object-fit: cover;
   	object-position: bottom;
   	font-family: 'object-fit: cover; object-position: bottom;';
   }

   To generate the font-family automatically, you can use the PostCSS plugin or the SCSS/SASS/Less mixins.

   If you set the font-family via JavaScript (which must be followed by calling objectFitImages()), make sure to include the quotes in the property.

3. the activation call before </body>, or on DOM ready

   objectFitImages();
   // if you use jQuery, the code is: $(function () { objectFitImages() });

   This will fix all the images on the page and also all the images added later (auto mode).

   Alternatively, only fix the images you want, once:

   // pass a selector
   objectFitImages('img.some-image');

   // an array/NodeList
   var someImages = document.querySelectorAll('img.some-image');
   objectFitImages(someImages);

   // a single element
   var oneImage = document.querySelector('img.some-image');
   objectFitImages(oneImage);

   // or with jQuery
   var $someImages = $('img.some-image');
   objectFitImages($someImages);

   You can call objectFitImages() on the same elements more than once without issues, for example to manually request an update of the object-fit value.

You don't need to re-apply it on resize, unless:

• You're using scale-down, or

• your media queries change the value of object-fit, like this

                               img { object-fit: cover; }
   @media (max-width: 500px) { img { object-fit: contain; } }

In one of those cases, use the watchMQ option:

objectFitImages('img.some-image', {watchMQ: true});
// or objectFitImages(null, {watchMQ: true}); // for the auto mode

Pick your favorite:

<script src="dist/ofi.min.js"></script>
<!-- CDN is also available, but I suggest you concatenate JS files instead -->
<!-- Visit https://cdnjs.com/libraries/object-fit-images -->

npm install --save object-fit-images

var objectFitImages = require('object-fit-images');

import objectFitImages from 'object-fit-images';

Both parameters are optional.

MIT © Federico Brigante