mobile typing isn't scored — practice only
async function fetchJson(url) {
JavaScript · general · type the snippet below to practice
def fib(n):
a, b = 0, 1
for _ in range(n):
a, b = b, a + b
return a
about this snippet
This is the fetchjson snippet in JavaScript — 6 lines of real JavaScript code that exercises common patterns you'll see in production. DeveloperType scores you on net WPM and accuracy and only counts runs above 95% accuracy on the leaderboard, so practice rewards precision, not speed alone.
view source (6 lines)
async function fetchJson(url) {
const res = await fetch(url);
if (!res.ok) throw new Error(res.statusText);
return res.json();
}
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