Untitled

Promise

console.log('script start');

setTimeout(function () {
    console.log('setTimeout');
}, 0);

new Promise(function (resolve) {
    console.log('promise1');
    resolve();
}).then(function () {
    console.log('promise2');
});

console.log('script end');

依赖更新

export function App(){
  const a = 123
  
  useEffect(()=> {
    console.log('refresh');
  }, [a])
}

export function App(){
  const b = []
  
  useEffect(()=> {
    console.log('refresh');
  }, [b])
}

export function App(){
  const c = useMemo(()=> {
    return []
  }, [])
  
  useEffect(()=> {
    console.log('refresh');
  }, [c])
}

Typescript

type A = {
  name: string
  age: number
}
type B = Partial<A>