Snippet - Validation Object with Required

validate_object.js

/**
 * 利用 validate function 可以驗證 object 中的必填欄位有無填寫
 **/

// object validation rules
const schema = {
  firstName: {
    required:true
  },
  lastName: {
    required:true
  }
}

// universal validation function
const validate = (schema, obj) => {
  for(field in schema) {
    if(schema[field].required) {
      if(!obj[field]) {
        return false;
      }
    }
  }
  return true;
}

let obj_valid = {
  firstName: 'Aaron',
  lastName: 'Chen'
}

let obj_invalid = {
  firstName: 'Aaron',
}

console.log(validate(schema, obj_valid))      // true
console.log(validate(schema, obj_invalid))    // false