# Changelog
All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [4.0.0] - 2021-01-14
### Changed
- Move code to native web component
### Added
- Demo page demo.html
### Removed
- Polymer framework

## [3.1.0] - 2020-04-16
### Added
- CSS variable --hamburger-button-bar-transition
- CSS variable --hamburger-button-bar-padding

### Removed
- CSS @apply rule