How can I add multiple properties for a class in Javascript?

Question

I want to add multiple properties to "Person" class. This instance will be called by getDetails() method. So I easily can pass an array of values to my objects (variable), ex. var john = new Person("John Doe", "32", "Web Developer");.

function Person(name, age, occupation) { this.name = name; this.age = age; this.occupation = occupation; } Person.prototype.getDetails = function () { return this.name; return this.age; return this.occupation; }; var john = new Person("John Doe", "32", "Web Developer"); document .getElementById('demo') .innerText = john.getDetails();

<h2>JavaScript Class Method</h2> <p>How to define and use a Class method.</p> <p id="demo"></p>

The "adding properties" part is correct. Do console.log(john) and you will see that too. The way you are inspecting your data is incorrect. Since a function can only return once, anything after return this.name; is ignored. — Felix Kling
– Felix Kling, Commented Aug 31, 2021 at 7:12

Peter Seliger · Accepted Answer · 2021-08-31 07:51:43Z

Note that after return all code is unreachable!

So you need to concatenate the properties and combine as a one string like this:

function Person(name, age, occupation) { this.name = name; this.age = age; this.occupation = occupation; } Person.prototype.getDetails = function () { return this.name + " " + this.age + " " + this.occupation; }; var john = new Person("John Doe", "32", "Web Developer"); document .getElementById('demo') .innerText = john.getDetails();

<h2>JavaScript Class Method</h2> <p>How to define and use a Class method.</p> <p id="demo"></p>

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