视图 使用 Blade组件传参 显示未定义？

<?php

namespace App\user\view\components;

use Illuminate\View\Component;

class Alert extends Component
{

    public $message;

    public function __construct($message=null)
    {

        $this->message = $message;

    }

    public function render()
    {
        return view('components/alert')->rawBody();
    }
}

<div class="alert alert-danger">
    {{ $message }}
</div>

<x-alert  :message="$message" />