javascript object has key code example
Example 1: how to check if object has key javascript
myObj.hasOwnProperty('key')
Example 2: javascript hasownproperty
var person = {
"first_name": "Bob",
"last_name": "Dylan"
};
person.hasOwnProperty('first_name');
person.hasOwnProperty('age');
Example 3: js object contain key
if ('key' in myObj)
if (!myObj.hasOwnProperty('key'))
Example 4: typescript check if object has key
if ('key' in myObj)
Example 5: 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 6: hasownproperty javascript
var x = {
y: 10};
console.log(x.hasOwnProperty("y"));
console.log(x.hasOwnProperty("z"));