fix: param bug where empty string is infered

dev/.gitignore

@@ -0,0 +1,175 @@
+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Caches
+
+.cache
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store

dev/README.md

@@ -0,0 +1,15 @@
+# dev
+
+To install dependencies:
+
+```bash
+bun install
+```
+
+To run:
+
+```bash
+bun run index.ts
+```
+
+This project was created using `bun init` in bun v1.1.17. [Bun](https://bun.sh) is a fast all-in-one JavaScript runtime.

dev/index.ts

@@ -0,0 +1,23 @@
+import { betterFetch, createFetch, createSchema } from "@better-fetch/fetch";
+import { z } from "zod";
+
+const $fetch = createFetch({
+	schema: createSchema({
+		"@patch/user": {
+			input: z.object({
+				id: z.string(),
+			}),
+		},
+	}),
+	baseURL: "http://localhost:3000",
+	onRequest(context) {
+		console.log("onRequest", JSON.parse(context.body));
+	},
+});
+
+const f = $fetch("https://jsonplaceholder.typicode.com/todos/:id", {
+	method: "GET",
+	params: {
+		id: "1",
+	},
+});

dev/package.json

@@ -0,0 +1,19 @@
+{
+	"name": "dev",
+	"module": "index.ts",
+	"type": "module",
+	"scripts": {
+		"client": "bun run index.ts",
+		"serve": "bun run server.ts"
+	},
+	"devDependencies": {
+		"@types/bun": "latest"
+	},
+	"peerDependencies": {
+		"typescript": "^5.0.0"
+	},
+	"dependencies": {
+		"@better-fetch/fetch": "workspace:*",
+		"zod": "^3.23.8"
+	}
+}

dev/server.ts

@@ -0,0 +1,10 @@
+Bun.serve({
+	fetch(request, server) {
+		return new Response("Hello World!", {
+			status: 200,
+			headers: {
+				"Content-Type": "text/plain",
+			},
+		});
+	},
+});

dev/tsconfig.json

@@ -0,0 +1,27 @@
+{
+  "compilerOptions": {
+    // Enable latest features
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}

doc/next.config.mjs

@@ -2,6 +2,7 @@ import { rehypeCodeDefaultOptions } from "fumadocs-core/mdx-plugins";
 import { remarkInstall } from "fumadocs-docgen";
 import createMDX from "fumadocs-mdx/config";
 import { transformerTwoslash } from "fumadocs-twoslash";
+
 const withMDX = createMDX({
 	mdxOptions: {
 		rehypeCodeOptions: {

packages/better-fetch/package.json

@@ -40,8 +40,6 @@
 			"require": "./dist/index.cjs"
 		}
 	},
-	"files": [
-		"dist"
-	],
+	"files": ["dist"],
 	"type": "module"
 }

packages/better-fetch/src/create-fetch/types.ts

@@ -18,9 +18,15 @@ export type CreateFetchOption = BetterFetchOption & {
 type WithRequired<T, K extends keyof T | never> = T & { [P in K]-?: T[P] };
 type InferBody<T> = T extends ZodSchema ? z.input<T> : any;
 
+type RemoveEmptyString<T> = T extends string ? ("" extends T ? never : T) : T;
+
 type InferParamPath<Path> =
 	Path extends `${infer _Start}:${infer Param}/${infer Rest}`
-		? { [K in Param | keyof InferParamPath<Rest>]: string }
+		? {
+				[K in
+					| Param
+					| keyof InferParamPath<Rest> as RemoveEmptyString<K>]: string;
+			}
 		: Path extends `${infer _Start}:${infer Param}`
 			? { [K in Param]: string }
 			: Path extends `${infer _Start}/${infer Rest}`

pnpm-workspace.yaml

@@ -1,4 +1,4 @@
 packages:
   - 'packages/*'
   - 'doc'
-  - "examples/*"
+  - "dev"