根据javascript中的条件在数组中插入具有相同键值的多个对象

let obj = {
  a: "day1",
  b: "",
  c: "day3",
  aa: 10,
  bb: 11,
  cc: 12,
}
let data = {};
let item = [];
for (let i in obj) {
  if (i === 'a') {
    data["title"] = obj.a;
    data['value'] = obj.aa;
  }
  if (i === 'b') {
    data["title"] = obj.b;
    data['value'] = obj.bb;
  }
  if (i === 'c') {
    data["title"] = obj.c;
    data['value'] = obj.cc;
  }
  item.push(data);
}
console.log(item)

const obj = {
  a: "day1",
  b: "",
  c: "day3",
  aa: 10,
  bb: 11,
  cc: 12,
}
const items = [];

// slightly fixed OP approach.
for (const key in obj) {
  if (key === 'a') {
    items.push({
      title: obj.a,
      value: obj.aa,
    });
  }
  if (key === 'b') {
    items.push({
      title: obj.b,
      value: obj.bb,
    });
  }
  if (key === 'c') {
    items.push({
      title: obj.c,
      value: obj.cc,
    });
  }
}
console.log({ items });

// or entirely generic/configurable and maybe even more expressive ...
console.log(
  Object
    .entries(obj)
    .reduce(({ target, valueMap, result }, [key, value]) => {

      if (key in valueMap) {
        result.push({
          title: value,
          value: target[valueMap[key]],
        });
      }
      return { target, valueMap, result };
    }, {
      target: obj,
      valueMap: { a: 'aa', b: 'bb', c: 'cc' },
      result: [],

    }).result
);

.as-console-wrapper { min-height: 100%!important; top: 0; }