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JavaScript

Posted by Andrew Courey
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Andrew Courey
Front End Web Development Techdegree Graduate 15,310 Points

Creating an object in Javascript with custom declaration

In Javascript, there are some objects like the Number object or the Array object that let you create them by typing a number like 5, or 10.6, or create arrays with [] instead of new Array(1,5,19). How can I create my own object where I can type $5 and it automatically creates a dollar object?

ravindrareddy
ravindrareddy
10,590 Points

We can use an object literal in Javascript to create an object with the necessary properties and methods. Not sure if this is what you are expecting. Ex: var person = { firstName : "Stephen", lastName: "Curry", age: 31, country: "USA" };

Andrew Courey
.a{fill-rule:evenodd;}techdegree seal-36
Andrew Courey
Front End Web Development Techdegree Graduate 15,310 Points

I am looking for a way to create an object, for example, a money object that has a literal declaration so I could type $10.21 and it would create a money object, instead of typing new Money(10.21);

1 Answer

Steven Parker
Steven Parker
242,191 Points
Steven Parker
Steven Parker
242,191 Points

What you're talking about would involve using symbols in ways that contradict the syntax rules of the language. So you would not be able to do this directly in JavaScript.

You might be able to do this by creating "transpiler" that would recognize your special syntax and translate it into JavaScript code. But it would be a bit tricky because some ordinary JavaScript identifiers might look like object creations in your new syntax.