This is a quick guide to show how to integrate Ledger Ethereum libraries into an existing web application.
If you are starting a new DApp project from scratch, or simply are beginning in this Ethereum Smart Contract world, we have made create-dapp Starter Kit for you, it comes with a out-of-the-box support of Ledger and MetaMask and shows a complete smart contract example (that allows to get/set a value globally).
Whether you want to integrate on an existing app or bootstrap it from scratch with our starter kit, the follow guide will drive you to important part on how things work with the Ledger.