js对象去空值方法

// 1. 对象去空值
const dellNull = (obj) => {
  let newObj = {}
  Object.keys(obj).forEach(key => {
    if (obj[key] !== null && obj[key] !== '' && obj[key] !== undefined) {
      newObj[key] = obj[key]
    }
  })
  return newObj
}