# `Mob.WebView`
[🔗](https://github.com/genericjam/mob/blob/master/lib/mob/webview.ex#L1)

Bidirectional JS bridge for the native WebView component.

Use `Mob.UI.webview/1` to embed the component, then call these functions
from `handle_info` to communicate with the page.

JS side — inject `window.mob` is injected automatically by the native layer:

    // Send a message to Elixir
    window.mob.send({ event: "clicked", id: 42 })

    // Receive a message from Elixir
    window.mob.onMessage(function(data) { console.log(data) })

Elixir side:

    def handle_info({:webview, :message, %{"event" => "clicked", "id" => id}}, socket) do
      {:noreply, socket}
    end

    def handle_info({:webview, :blocked, url}, socket) do
      # A navigation attempt was blocked by the allow: whitelist
      {:noreply, socket}
    end

# `eval_js`

```elixir
@spec eval_js(Phoenix.LiveView.Socket.t(), String.t()) :: Phoenix.LiveView.Socket.t()
```

Evaluate arbitrary JavaScript in the current WebView and return the result
asynchronously via `handle_info({:webview, :eval_result, result}, socket)`.

# `post_message`

```elixir
@spec post_message(Phoenix.LiveView.Socket.t(), term()) :: Phoenix.LiveView.Socket.t()
```

Push a message from Elixir into the WebView page. Calls `window.mob._dispatch(json)`
in JS, which delivers the data to all `window.mob.onMessage` handlers.

---

*Consult [api-reference.md](api-reference.md) for complete listing*
