I want to update HTML title every time users navigates in my LiveView app. I just thought it would be convenient if I can generate a title from the module name.
According to Phoenix LiveView documentation, it is as easy as providing a title text to socket.assigns[:page_title].
defmodule MnishiguchiWeb.EnvironmentLive do
use MnishiguchiWeb, :live_view
def mount(_params, _session, socket) do
socket = assign(socket, page_title: "Environment")
{:ok, socket}
end
...
The problem is solved and it is more than good enough. But I was curious if I can generate the page title based on module name. I found Phoenix.Naming module useful to achieve that.
MnishiguchiWeb.EnvironmentLive
|> Phoenix.Naming.resource_name("Live")
|> Phoenix.Naming.humanize()
# "Environment"
So I made a simple utility function that wraps Phoenix.Naming operations.
defmodule MnishiguchiWeb.LiveUtils do
@doc """
Generates a page title string based on the specified LiveView module atom.
## Examples
iex(1)> LiveUtils.page_title(MnishiguchiWeb.Environment)
"Environment"
iex(2)> LiveUtils.page_title(MnishiguchiWeb.Environment.Measurements)
"Measurements"
"""
def page_title(view_atom) when is_atom(view_atom) do
view_atom
|> Phoenix.Naming.resource_name("Live")
|> Phoenix.Naming.humanize()
end
end
Then I can use it in my live views.
defmodule MnishiguchiWeb.EnvironmentLive do
use MnishiguchiWeb, :live_view
@default_assigns [
page_title: MnishiguchiWeb.LiveUtils.page_title(__MODULE__),
]
def mount(_params, _session, socket) do
socket = assign(socket, @default_assigns)
{:ok, socket}
end
...
I know it is not really necessary, but one benefit is that now I can copy and paste that snippet when making a live view without needing to come up with a page title.
There might be cleaner approaches but I am happy with this nice and simple solution.
Speaking of page title, I have written this other function before so that I can configure site-wide title suffix.
I want to try Internationalization (i18n) next.
That's it!
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