Javascript:Omit specific Object properties

How to selecting required properties from object.

Consider following code snippet.Here s contain additional

property,city location that we want to remove.

Solution 1:

Code:

var s = {

name: "sangram",

age: 56,

city:"kankavali",

location: "mumbai",

};

var subset = function ({ name, age }) {

return { name, age };

};

var x = subset(s);

console.log(x);

Output:

{ name: 'sangram', age: 56 }

Explanation:

Here we are passing all properties we want in our derived

object so excluding location & city while pssing remaining

properties name & age.we get a object derived from original

object with only properties that we passed to to function

subset.

Solution 2:

Code:

const foo={

"bar":"sangram",

"baz":"sagar",

"mux":"sachin",

"fch":"swapnil"

}

const { bar,baz, ...qux } = foo

console.log(qux)

Output:

{ mux: 'sachin', fch: 'swapnil' }

Explanation:

Here we are using rest operator as const { bar,baz, ...qux } = foo

we want to omit properties bar & baz so we passed it first then ...qux.

Now qux will get an object derived from foo with all properties except

bar & baz.