From 5a3daa7abe6b8b4f92cd2db79dcb6cd7def7c7ab Mon Sep 17 00:00:00 2001
From: Griko Nibras <git@griko.id>
Date: Mon, 22 Nov 2021 10:34:40 +0700
Subject: [PATCH] feat: simplify resolving breakpoint input

Signed-off-by: Griko Nibras <git@griko.id>
---
 README.md    | 56 ++++++++++++++++++++++++++++++++++++++++++++++++----
 src/index.ts | 13 ++++++------
 2 files changed, 59 insertions(+), 10 deletions(-)

diff --git a/README.md b/README.md
index 7b2e019..d94390b 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ Custom hooks to use Tailwind CSS breakpoints for React 🎐🔨
 
 - [Installing](#installing)
 - [Usage](#usage)
+  - [Option #1: Resolve directly from `tailwind.config.js`](#option-1-resolve-directly-from-tailwindconfigjs)
+  - [Option #2: Only pass breakpoint values](#option-2-only-pass-breakpoint-values)
 - [Available hooks](#available-hooks)
   - [`useBreakpoint()`](#usebreakpoint)
   - [`useBreakpointEffect()`](#usebreakpointeffect)
@@ -36,13 +38,59 @@ yarn add @kodingdotninja/use-tailwind-breakpoint
 
 ## Usage
 
-[Similar to `pmndrs/zustand`'s `create` API](https://github.com/pmndrs/zustand/#first-create-a-store), create the breakpoint hooks by resolving your `tailwind.config.js`:
+### Option #1: Resolve directly from `tailwind.config.js`
+
+[Similar to `pmndrs/zustand`'s `create` API](https://github.com/pmndrs/zustand/#first-create-a-store), initialize the breakpoint hooks by passing the `tailwind.config.js` which will be resolved internally using [`resolveConfig`](https://github.com/tailwindlabs/tailwindcss/blob/master/src/util/resolveConfig.js):
+
+```ts
+// /hooks/tailwind.ts
+
+import create from "@kodingdotninja/use-tailwind-breakpoint";
+
+import tailwindConfig from "path/to/tailwind.config.js";
+
+export const { useBreakpoint } = create(tailwindConfig);
+```
+
+> ⚠️ This possibly imports all `tailwind.config.js` values. Make sure to check the client bundle size.
+
+### Option #2: Only pass breakpoint values
+
+Extract the [`screens`](https://tailwindcss.com/docs/breakpoints) values into a separate file:
+
+```js
+// tailwind.screens.js or other name to separate breakpoint values
+const screens = {
+  sm: "640px",
+  md: "768px",
+  // ...
+};
+```
+
+To keep the same values, `require` inside `tailwind.config.js`:
+
+```js
+// tailwind.config.js
+module.exports = {
+  theme: {
+    extend: {
+      screens: require("path/to/tailwind.screens.js"),
+    },
+  },
+  // ...
+};
+```
+
+Then pass the extracted `screens` to the `create` function:
 
 ```ts
+// /hooks/tailwind.ts
+
 import create from "@kodingdotninja/use-tailwind-breakpoint";
-import tailwindConfig from "path/to/tailwind.config";
 
-export const { useBreakpoint, ... } = create(tailwindConfig);
+import tailwindScreens from "path/to/tailwind.screens.js";
+
+export const { useBreakpoint } = create(screens);
 ```
 
 ## Available hooks
@@ -52,7 +100,7 @@ export const { useBreakpoint, ... } = create(tailwindConfig);
 Use breakpoint value from given breakpoint token
 
 ```jsx
-import { useBreakpoint } from "@kodingdotninja/use-tailwind-breakpoint";
+import { useBreakpoint } from "./lib/";
 
 function App() {
   const isDesktop = useBreakpoint("md");
diff --git a/src/index.ts b/src/index.ts
index 484543b..bb1394d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,6 +7,8 @@ import { TailwindConfig } from "tailwindcss/tailwind-config";
 
 export * from "./utils";
 
+export type Breakpoints = { readonly [breakpoint: string]: string };
+
 export type CreatorReturnType = {
   /**
    * Use breakpoint value from given breakpoint token
@@ -75,7 +77,7 @@ export type CreatorReturnType = {
  *
  * ---
  *
- * @param configFile Tailwind CSS configuration file (`tailwind.config.js`)
+ * @param configOrScreens Tailwind CSS configuration file (`tailwind.config.js`)
  *
  * @returns Breakpoint hooks
  *
@@ -90,10 +92,10 @@ export type CreatorReturnType = {
  * export const { useBreakpoint, useBreakpointEffect, useBreakpointValue, ... } = create(tailwindConfig);
  * ```
  */
-export function create<Config extends TailwindConfig>(configFile: Config) {
-  const config = resolveConfig(configFile);
+export function create<ConfigOrScreens extends TailwindConfig | Breakpoints>(configOrScreens: ConfigOrScreens) {
+  const screens = (resolveConfig(configOrScreens as TailwindConfig).theme.screens ?? configOrScreens) as Breakpoints;
 
-  function useBreakpoint<Breakpoint>(breakpoint: Breakpoint, defaultValue: boolean = false) {
+  function useBreakpoint(breakpoint: string, defaultValue: boolean = false) {
     const [match, setMatch] = React.useState(() => defaultValue);
     const matchRef = React.useRef(defaultValue);
 
@@ -101,8 +103,7 @@ export function create<Config extends TailwindConfig>(configFile: Config) {
       if (!(isBrowser && "matchMedia" in window)) return undefined;
 
       function track() {
-        // @ts-expect-error tsconfig.compilerOptions.strict prevents accessing index with unknown value type
-        const value = (config.theme.screens?.[breakpoint] as string) ?? "999999px";
+        const value = screens?.[breakpoint] ?? "999999px";
         const query = window.matchMedia(`(min-width: ${value})`);
         matchRef.current = query.matches;
         if (matchRef.current != match) {