drive/apps/drive-web/src/APITester.tsx

import { type FormEvent, useRef } from "react"

export function APITester() {
	const responseInputRef = useRef<HTMLTextAreaElement>(null)

	const testEndpoint = async (e: FormEvent<HTMLFormElement>) => {
		e.preventDefault()

		try {
			const form = e.currentTarget
			const formData = new FormData(form)
			const endpoint = formData.get("endpoint") as string
			const url = new URL(endpoint, location.href)
			const method = formData.get("method") as string
			const res = await fetch(url, { method })

			const data = await res.json()
			responseInputRef.current!.value = JSON.stringify(data, null, 2)
		} catch (error) {
			responseInputRef.current!.value = String(error)
		}
	}

	return (
		<div className="api-tester">
			<form onSubmit={testEndpoint} className="endpoint-row">
				<select name="method" className="method">
					<option value="GET">GET</option>
					<option value="PUT">PUT</option>
				</select>
				<input
					type="text"
					name="endpoint"
					defaultValue="/api/hello"
					className="url-input"
					placeholder="/api/hello"
				/>
				<button type="submit" className="send-button">
					Send
				</button>
			</form>
			<textarea
				ref={responseInputRef}
				readOnly
				placeholder="Response will appear here..."
				className="response-area"
			/>
		</div>
	)
}