inline conditional css comparison of leex and heex

leex_to_heex.ex

##### phx live view 0.16 with leex

def render(assigns) do
  ~L"""
    <button class="<%= if @foo && @bar && @baz do %>text-blue-600<% else %>text-red-600<% end %>">hello</button>
  """
end

##### phx live view 0.16 with heex -inline edition

def render(assigns) do
  ~H"""
    <button class={"#{if @foo && @bar && @baz, do: "text-blue-600", else: "text-red-600"}"}>hello</button>
  """
end

##### phx live view 0.16 with heex -verbose edition

def render(assigns) do
  ~H"""
    <button class={"#{css_apply(&some_func/3, [@foo, @bar, @baz], "text-blue-600", "text-red-600")}"}>hello</button>
  """
end

def some_func(foo, bar, baz) do
  if foo && bar && baz, do: true, else: false
end

def css_apply(func, args, result, else_result \\ "") do
  if apply(func, args) do
    result
  else
    else_result
  end
end