Roast My Code

			This function is a time traveler: it returns `data` before `fetch` has even packed its bags. The result is always `null` because promises run asynchronously, while `return data` sprints out immediately.

Also:

- `var` crawled out of a 2012 tutorial; use `const`/`let`.
- No `response.ok` check, so a 404 may become a confusing JSON error.
- No error handling—network failure gets promoted to “unhandled rejection.”
- Raw `id` in the URL invites malformed paths; encode it.

```js
async function getData(id) {
  const response = await fetch(`/api/user/${encodeURIComponent(id)}`);

  if (!response.ok) {
    throw new Error(`Request failed: ${response.status}`);
  }

  return response.json();
}
```

Now it returns a promise intentionally, instead of returning `null` with the confidence of a function that has never met causality.
		

			This function is a beautiful monument to hope. You fire off a `fetch`, then immediately `return data` — which is `null`, because the promise hasn't resolved yet. You're basically ordering a pizza and eating the empty box.

The `.then(d => { data = d })` is pure ritual. The data arrives eventually, gets assigned to a variable nobody's listening to anymore, and dies alone. That's not async programming, that's a séance.

Also spotted:
- `var` in the year of our lord 2025 — `let`/`const` called, they miss you
- Zero error handling — if the API fails, this fails *silently and confidently*, the worst combo
- No `response.ok` check, so a 404 gets happily parsed as JSON
- String concatenation for the URL — one unescaped `id` away from adventure

The fix is literally `async/await`. Two keywords. This function returns `null` with more reliability than most functions return anything.
		

			This function has the object permanence of a toddler. You threw the `fetch` request, but instead of waiting for it to finish, you immediately returned `null` and called it a day. Congratulations, this will *literally always* return `null`. Synchronous code doesn't wait for asynchronous callbacks just because they are in the same room.

Also, `var`? Did you write this on a BlackBerry? It’s `let` or `const` now. And you’re using string concatenation (`+ id`) instead of template literals like a savage. 

Finally, there’s zero error handling. If that API 404s, your app will just swallow the unhandled promise rejection and die in silence. 

Throw this in the trash, google `async/await`, and try again before your codebase reports you to HR.
		

			This function returns `null`. Always. Every time. With a 100% success rate. `fetch` is asynchronous, but you `return data` synchronously — the promise resolves *after* the function has already handed back its empty little gift. It's not a data fetcher; it's an elaborate, network-touching `return null`.

The `.then()` chain fires into the void like a message in a bottle, except you've already declared the ocean empty.

Bonus crimes:

- **`var`** — vintage. Bold choice for code that apparently time-traveled from 2009.
- **No `.catch()`, no `r.ok` check.** When the server 500s, `r.json()` will discover HTML error pages aren't JSON, and the resulting error will die alone, unloved, unheard.
- **Raw string concatenation** of `id` into the URL — `encodeURIComponent` is right there.

Fix: make it `async`, return the awaited JSON, handle errors. Or just `return null` — more honest.
		

			This function is a masterclass in optimism. It fires off a fetch, immediately returns `null`, and calls it a day—like ordering food and leaving before the waiter finishes writing it down.

The real bugs: you're returning data before the promise settles (always null), there's zero error handling (404s and network fails just vanish), and `var` + mutation inside a closure is peak 2015 regret. 

Also, string concatenation in 2024? Bold choice. Just `return fetch(...)` next time—your callers will thank you, and so will your future self who has to debug why everything's null.
		

			Ah, the "I'll just fetch synchronously" approach—a classic! This function is so optimistic, it assumes the internet works at the speed of thought. It fires off a request, then immediately returns `null` while the fetch is still out there, sipping coffee. Your poor `data` variable is like a ghost—assigned in the callback, but never seen again.

You’re also ignoring errors, which is like driving blindfolded and hoping for the best. And `var`? That’s so 1999. Use `const` or `let`, you time traveler.

Fix: Make it async, handle errors, and return the promise. Or just tell the user to wait—they love that.