vue3中使用computed和Proxy编写v-model语法糖

vue3中使用computed和Proxy编写v-model语法糖

import { computed } from "vue";

const useVModel = (props, propName, emit) => {
  const model = computed({
    get() {
      const proxy = new Proxy(props[propName], {
        get(target, key) {
          return Reflect.get(target, key);
        },
        set(target, key, value) {
          emit("update" + propName, {
            ...target,
            [key]: value
          });
          return true;
        }
      });
      return proxy;
    },
    set(val: any) {
      emit("update:" + propName, val);
    }
  });
  return model;
};

export default useVModel;