The Object hasOwnProperty() method

Apr 17, 2019

Learn how the JavaScript hasOwnProperty() method checks if an object has a property of its own, returning true or false for the property name you pass in.

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Called on an object instance, accepts a string as argument. If the object has a property with the name contained in the string argument, it returns true. Otherwise it returns false.

Example:

const person = { name: 'Fred', age: 87 }
person.hasOwnProperty('name') //true
person.hasOwnProperty('job') //false

Tagged: JavaScript · All topics

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