Course Introduction and Application Walk through for RTK Query Basics

Set up RTK Query with createAPI and ApiProvider that Serve Fake Data

Fetch Data from a Live Endpoint with RTK Query

Pass Query Arguments to RTK Query Hooks

Refactor RTK Query Endpoints to use baseQuery to Remove Code Duplication

Refactor baseQuery to use RTK Query fetchBaseQuery

Convert a RTK Query Application to TypeScript

Explore Redux Devtools to Understand Your RTK Query App Data Fetching Behavior

Refactor RTK Query to Use a Normal Redux Toolkit Store

RTK Query Basics: Query Endpoints, Data Flow and TypeScript

We can reduce code duplication using a `baseQuery` from RTK Query. We do this by moving duplicate code into a `baseQuery` function and writing `query` functions instead of `queryFn`. The return value of those `query` functions will be passed on as first argument into the `baseQuery`.

https://app.egghead.io/api/v1/lessons/redux-refactor-rtk-query-endpoints-to-use-basequery-to-remove-code-duplication/subtitles

Instructor: [0:00] If we look at our code, we still have a lot of duplicate code here, between this query function, and this other query function. We can reduce that, and that's where base query comes into play.
[0:12] Let's just take off this code and move it into our base query. Of course, calling this for every endpoint wouldn't be perfect because we don't always want to call this one URL. Let's say, we want to pass in a variable here and we get it as the argument to base query.

[0:32] Now, we can remove our query function here. I'll quickly copy this URL and instead, add a function named query that returns this URL. We can do the same down here. We add a function named query, which gets a name as an argument as before, and we return this URL.

[0:59] Like that, we removed a lot of code duplication.

Refactor RTK Query Endpoints to use baseQuery to Remove Code Duplication

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RTK Query Basics: Query Endpoints, Data Flow and TypeScript