form-render/es/widgets/utils/hooks.js

通过 JSON Schema 生成标准 Form，常用于自定义搭建配置界面生成

import { useReducer, useRef, useEffect } from 'react';
export function usePrevious(value) {
  var ref = useRef(null);
  useEffect(function () {
    ref.current = value;
  }, [value]);
  return ref.current;
}
// 类似于class component的setState
export var useSet = function useSet(initState) {
  return useReducer(function (state, newState) {
    return Object.assign(Object.assign({}, state), newState);
  }, initState);
};