the module @reach-sh/stdlib/ETH.mjs;
the module @reach-sh/stdlib/ALGO.mjs;
$ npm install @reach-sh/stdlib
Although, if you use reach run, you don’t need to install this package, because reach automatically manages your standard library install behind the scenes. You only need to install the package directly if you are running your frontend without reach or using a tool like webpack for deployment.
These libraries provide a standard interface that support developing frontends.