How to type dʒ symbol (IPA) on Mac?

I want to type in dʒ on macOS but I don't know how I can type it. I tried ⌥ + keys but it seems that none of the keys is mapped to the symbol. It's not listed on this page.

I use the US Extended keyboard: So how can I type this symbol?

With ABC (formerly US) Extended, ʒ is made by typing option-shift ; and then z.

In general, to see which key does what, use Keyboard Viewer.

More info about ABC Extended can be found here. And here.

If you know the Unicode name of the character, you can use ⌘ - ^ - Space to bring up a character search. This character is called Ezh:

Usually this is used for Emoji, but as you can see, it works for any character.