Answers for "object hasownproperty javascript"

javascript hasownproperty

var person = {	
  	"first_name": "Bob",
	"last_name": "Dylan"
};
person.hasOwnProperty('first_name'); //returns true
person.hasOwnProperty('age'); //returns false

Object.hasOwnProperty.call

const data = {
	a: 'a value'
}
// esnext, esm valid
const hasA = Object.hasOwnProperty.call(data, 'a'); // true
// browser, vanillajs, esnext, esm, commonjs
const hasA = data.hasOwnProperty('a'); // true

hasownproperty()

var x = {
    y: 10
};
console.log(x.hasOwnProperty("y")); //true
console.log(x.hasOwnProperty("z")); //false