Get Champion by key or by ID with the latest DDragon version (Javascript)

ddragon_example.js

let championByIdCache = {};
let championJson = {};

async function getLatestChampionDDragon(language = "en_US") {

	if (championJson[language])
		return championJson[language];

	let response;
	let versionIndex = 0;
	do { // I loop over versions because 9.22.1 is broken
		const version = (await fetch("http://ddragon.leagueoflegends.com/api/versions.json").then(async(r) => await r.json()))[versionIndex++];
	
		response = await fetch(`https://ddragon.leagueoflegends.com/cdn/${version}/data/${language}/champion.json`);
	}
	while (!response.ok)
	
	championJson[language] = await response.json();
	return championJson[language];
}

async function getChampionByKey(key, language = "en_US") {

	// Setup cache
	if (!championByIdCache[language]) {
		let json = await getLatestChampionDDragon(language);

		championByIdCache[language] = {};
		for (var championName in json.data) {
			if (!json.data.hasOwnProperty(championName))
				continue;

			const champInfo = json.data[championName];
			championByIdCache[language][champInfo.key] = champInfo;
		}
	}

	return championByIdCache[language][key];
}

// NOTE: IN DDRAGON THE ID IS THE CLEAN NAME!!! It's also super-inconsistent, and broken at times.
// Cho'gath => Chogath, Wukong => Monkeyking, Fiddlesticks => Fiddlesticks/FiddleSticks (depending on what mood DDragon is in this patch)
async function getChampionByID(name, language = "en_US") {
	return await getLatestChampionDDragon(language)[name];
}

async function main() {
	const annie = await getChampionByKey(1, "en_US");
	const leona = await getChampionByKey(89, "es_ES");
	const brand = await getChampionByID("brand");

	console.log(annie);
	console.log(leona);
	console.log(brand);
}

main();

So helpful! <3

I sincerely thank you

Based, thank you for sharing!

python way to get from the championID to championNAME

import json

with open("champion.json", "r", encoding="utf-8") as file:
champion_data = json.load(file)

champion_name_key_map = {}

for champion_name, champion_info in champion_data["data"].items():
champion_key = champion_info["key"]
champion_name_key_map[champion_key] = champion_name

for key, name in champion_name_key_map.items():
print(f"Champion Key: {key}, Champion Name: {name}")

with open("champion_name_key_map.json", "w", encoding="utf-8") as outfile:
json.dump(champion_name_key_map, outfile, indent=4)

print("Champion name and key mapping has been written to 'champion_name_key_map.json'")