JS get some attributes of the object

obj Data objects

let obj = {
    
	name:'fasf',
	age:18,
	sef:'gsadf',
	fj:'goiop',
	fupo:'hoipgeu'
}	

1. Ordinary function

// Returns the object  obj  Some key value pairs in , keys Is a key value sequence 
function partObject(obj,keys){
    
	if(!keys instanceof Array || keys.length === 0)
 		return 
 	let returnObj = {
    }
 	keys.forEach(item => {
    
 		if(obj.hasOwnProperty(item))
 			returnObj[item] = obj[item]
 	})
 	return returnObj
}
			
 console.log(obj.add(2,3))
 let props = ['age','sef','fupo']
 let result = partObject(obj,props)
 console.log(result)
 //{age: 18, sef: 'gsadf', fupo: 'hoipgeu'}

2. prototype Prototype

Object.prototype.partObject = function(keys){
    
	if(!keys instanceof Array || keys.length === 0)
		return 
	let returnObj = {
    }
	keys.forEach(item => {
    
		if(this.hasOwnProperty(item))
			returnObj[item] = this[item]
	})
	return returnObj
}

let props = ['age','sef','fupo']
let result = obj.partObject(props)
console.log(result)
// {age: 18, sef: 'gsadf', fupo: 'hoipgeu'}