Javascript - Object literals as function argument

Introduction

Object literals are a preferred way of passing a large number of optional arguments to a function:

function displayInfo(args) {
    var output = "";

    if (typeof args.name == "string"){
        output += "Name: " + args.name + "\n";
    }

    if (typeof args.age == "number") {
        output += "Age: " + args.age + "\n";
    }

    console.log(output);
}

displayInfo({
    name: "First",
    age: 29
 });

displayInfo({
    name: "new Name"
});

Here, the function displayInfo() accepts a single argument named args.

The argument may come in with a property called name or age or both or neither of those.

The function tests for the existence of each property using the typeof operator and then to construct a message to display based on availability.

Javascript - Object literals as function argument

Introduction

Related Topic