Chapter 4: Pattern Matching

Elixirscript supports all of the same pattern matching and guard rules that Elixir supports. Pattern Matching also works on JavaScript objects and classes as well.

Let's show an example of Pattern Matching on a JavaScript object. Assume we have a function, process, that takes a DOM element as a parameter. We want to process a div element with the id "my-div" differently so we will create a function head that matches just for it and another to match on all other elements.

def process(%HTMLDivElement{id: "my-div"} = div) do

end

def process(element) do

end

`

As you can see, matching on JavaScript objects is similar to matching on structs.