…ena#98)

* Update README.md

* Include iframe in demo and README ApoorvSaxena#88

* Reduce example in README

* 🎉 Add loaded callback

* 📝 Add documentation

* 🐛 Fix overwriting of markAsLoaded method

`markAsLoaded` is required to run for the `isLoaded` method to be useful.

Also added a negative test for when a custom `load` option is passed in.

* 🚿 Remove commented out code

* update git ignores

* new-build

* fix code style

* picture demo

* README description

* README description - custom function definition

* fix for IE browser

* fix for IE browser. upd

* One demo page - `demo/index.html`

* Support passing of a DOM Element, or NodeList

* Test for NodeList

* Formatting, verify NodeList length

* README updates

we switched our index and /data page from blazy to lozad

…rvSaxena#76)

✨ resolves ApoorvSaxena#38

✨ updated documentation

✨ updated README to display size badge (ApoorvSaxena#64)

* ✨ add dev server closes ApoorvSaxena#33

* ✨ add watch mode

* ✨ updated package version

* 🐛 fixed data-background-image attr

* ✨ updated package version in dist files

* ✨ added test cases for other attributes usage

✨ added triggerLoad support

* lint test files

* ✨ add trigger load function closes ApoorvSaxena#42

* remove console.log

* add build script to precommit hook

* ✨ use matches method

* 📝 add documentation of triggerLoad

* ✨ add small polyfill for matches

* 💚 fix tests

* ✨ make requested changes

* ✨ 📝 update the docs

* 📝 update the docs

* add build files

✨ Fixed IE 9 dataset issue

* Removed package-lock

* Removed timeout intended for testing

* ✨ added support for background images

* added support for responsive images

* replaced images with progressive JPEGs

* fixed lint issues

* 🎉 setup test case infra with basic test cases

* ✨ added test cases when image shouldn't load

* ✨ added test cases when different selector is used

* 💚 fixed CI build

* 💚 fixed test cases and CI build