- How to append - https://elixirforum.com/t/how-to-append-inputs-for-phoenix-html-form-inputs-for/2448
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Phoenix.HTML.FormData protocol https://hexdocs.pm/phoenix_html/Phoenix.HTML.FormData.html#to_form/2
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Phoenix HTML.Form https://hexdocs.pm/phoenix_html/2.4.0/Phoenix.HTML.Form.html#inputs_for/4
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