Example of using Handlebars lookup helper

Question

Handlebars has a built-in helper called lookup. The documentation is not very clear about how it works. Could I see an example?

Answer 1

The lookup property is useful if we don't know the name of the property we want, for instance because it's in a variable or the result of an expression.

If we have this object:

var book = {
    title: 'Discovery of Heaven'
};

We could put this in the HTML like this:

{{book.title}}

Which is equivalent to:

{{lookup book 'title'}}

Maybe we don't know that we want the title. Say the property name is somewhere in a variable instead:

var property = 'title';

Now we could show the book title like this:

{{lookup book property}}