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'use strict';
const stateMap = new WeakMap();
function useState(key, init) {
const update = (v) => stateMap.set(key, v);
if (stateMap.has(key)) {
return [stateMap.get(key), update];
stateMap.set(key, init);
return [init, update];
for (let i = 0; i < 10; i += 1) {
const [count, setCount] = useState`${0}`;
setCount(count + 1);

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cmoog commented Jun 7, 2019

@devsnek Very clever use of the array reference as a key in the WeakMap. Would there be any way to associate this hook with its surrounding component and trigger a rerender when necessary?

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