对象扁平化

对象扁平化

function objectFlat(obj = {}) {
  const res = {}
  function flat(item, preKey = '') {
    Object.entries(item).forEach(([key, val]) => {
      const newKey = preKey ? `${preKey}.${key}` : key
      if (val && typeof val === 'object') {
        flat(val, newKey)
      } else {
        res[newKey] = val
      }
    })
  }
  flat(obj)
  return res
}

// 测试
const source = { a: { b: { c: 1, d: 2 }, e: 3 }, f: { g: 2 } }
console.log(objectFlat(source));