I’m expecting to see the value of 26 returned to the console based on the following code snippet, but I get ‘undefined’. Have I used the ‘this’ keyword incorrectly?
const myDetails = { name: "peter", birthYear: 1996, calcAge: function () { this.age = 2022 - this.birthYear; return this.age; }, gender: "male" } console.log(myDetails.age);
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Answer
I change your code a little bit. it should be work now. when you call the function you must need to use function name.
const myDetails = { name: "peter", birthYear: 1996, calcAge: function() { this.age = 2022 - this.birthYear; return this.age; }, gender: "male" } console.log(myDetails.calcAge());//Here