js has own property code example
Example 1: javascript hasownproperty
var person = {
"first_name": "Bob",
"last_name": "Dylan"
};
person.hasOwnProperty('first_name');
person.hasOwnProperty('age');
Example 2: has own propriety javascrip
var x = {
y: 10
};
console.log(x.hasOwnProperty("y"));
console.log(x.hasOwnProperty("z"));
Example 3: has own propriety javascrip
if (someVar.hasOwnProperty('someProperty') ) {
} else {
}
Example 4: hasOwnProperty
The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).
const object1 = {};
object1.property1 = 42;
console.log(object1.hasOwnProperty('property1'));
console.log(object1.hasOwnProperty('toString'));
Example 5: hasownproperty javascript
var x = {
y: 10};
console.log(x.hasOwnProperty("y"));
console.log(x.hasOwnProperty("z"));
Example 6: how reliable is js hasownproperty
o = new Object();
o.propOne = null;
o.hasOwnProperty('propOne');
o.propTwo = undefined;
o.hasOwnProperty('propTwo');