flatpickr + LiveView example

app.js

// assets/js/app.js

// ...
import Pickr from "./pickr"

const hooks = {
  Pickr
}

// ...

let liveSocket = new LiveSocket("/live", Socket, { hooks, params: { _csrf_token: csrfToken } })

pickr-index.js

// assets/js/pickr/index.js

import flatpickr from "flatpickr";

const Pickr = {
  mounted() {
    this.pickr = flatpickr(this.el, {
      wrap: true,
      altInput: this.el.dataset.pickrAltFormat ? true : false,
      altFormat: this.el.dataset.pickrAltFormat || "d M Y",
      dateFormat: this.el.dataset.pickrDateFormat || "Y-m-d"
    })
  },
  updated() {
    const altFormat = this.el.dataset.pickrAltFormat
    const wasFormat = this.pickr.config.altFormat
    if (altFormat !== wasFormat) {
      this.pickr.destroy()
      this.pickr = flatpickr(this.el, {
        wrap: true,
        altInput: this.el.dataset.pickrAltFormat ? true : false,
        altFormat: this.el.dataset.pickrAltFormat || "d M Y",
        dateFormat: this.el.dataset.pickrDateFormat || "Y-m-d"
      })
    }
  },
  destroyed() {
    this.pickr.destroy()
  }
}

export default Pickr

pickr_live.ex

# lib/my_app_web/live/pickr_live.ex

defmodule MyAppWeb.PickrLive do
  use MyAppWeb, :live_view

  @impl Phoenix.LiveView
  def render(assigns) do
    ~L"""
    <h2>flatpickr example</h2>

    <form id="pickr-form" action="#" phx-change="validate">
      <div id="starts-at-pickr" class="flatpickr" phx-update="ignore" phx-hook="Pickr" data-pickr-alt-format="<%= @format %>">
        <label for="starts-at">Starts at</label>
        <input type="text" id="starts-at" name="pickr[starts_at]" placeholder="Select Start Date.." data-input />
      </div>

      <div id="ends-at-pickr" class="flatpickr" phx-update="ignore" phx-hook="Pickr" data-pickr-alt-format="<%= @format %>">
        <label for="ends-at">Ends at</label>
        <input type="text" id="ends-at" name="pickr[ends_at]" placeholder="Select End Date.." data-input />
      </div>
    </form>

    <%= if @values do %>
    <p>Values: <code><%= @values %></code></p>
    <% end %>

    <hr />

    <form id="format" action="#" phx-change="format">
    <label>Alt Format</label>
    <input type="text" name="format" value="<%= @format %>"/>
    </form>
    """
  end

  @impl Phoenix.LiveView
  def handle_event("validate", %{"pickr" => _} = values, socket) do
    {:noreply, assign(socket, :values, inspect(values, pretty: true))}
  end

  def handle_event("format", %{"format" => format}, socket) do
    {:noreply, assign(socket, :format, format)}
  end

  @impl Phoenix.LiveView
  def mount(_, _, socket) do
    {:ok, socket |> assign(:values, nil) |> assign(:format, "")}
  end
end

@absowoot Thank you for the help. Unfortunately I am still having issues with the css with the arrows being so large and it still being present even when the input has not been clicked. This time it isn't loading at the bottom of the page but in the right spot Could I have imported it wrong or could I have done something else wrong?

@micahsoftdotexe Try adding a relative class to the div where phx-hook is located. Also, double-check that the tailwind classes are being applied IE the arrow SVG should have a width of 1rem with the w-4 class.