4 simple ways to download jsConvert. (GitHub, NPM and unpkg)
unpkg
<script src="https://unpkg.com/js-convert-case/dist/js-convert-case.min.js"></script>
git clone https://github.com/huynhsamha/js-convert-case.git
npm install --save js-convert-case
+ Use yarn :
yarn add js-convert-case