第一个 ​

// object validation rules
const schema = {
  first: {
    required: true,
  },
  last: {
    required: true,
  },
}

// universal validation function
const validate = (schema, values) => {
  for (field in schema) {
    if (schema[field].required) {
      if (!values[field]) {
        return false
      }
    }
  }
  return true
}
console.log(validate(schema, { first: 'Bruce' })) // false
console.log(validate(schema, { first: 'Bruce', last: 'Wayne' })) // true

// object validation rules
const schema = {
  first: {
    required: true,
  },
  last: {
    required: true,
  },
}

// universal validation function
const validate = (schema, values) => {
  for (field in schema) {
    if (schema[field].required) {
      if (!values[field]) {
        return false
      }
    }
  }
  return true
}
console.log(validate(schema, { first: 'Bruce' })) // false
console.log(validate(schema, { first: 'Bruce', last: 'Wayne' })) // true