By using Starknet Hardhat Plugin, you adapt Hardhat environment to work with Starknet smart contracts. Apart from compiling and deploying contracts, you can interact with them and test them through Javascript.
Speed up the testing of how your contracts interact with Starknet by using Starknet Devnet. It runs a local network aimed to mimic the official Starknet testnet.
A library that allows developers to build their JavaScript frontend and easily interact with any local or remote Starknet network.