Including Assets (CSS, JS) in Symfony 4 / Twig Template

Im learning Symfony and trying to set up a boilerplate app in Symfony 4

This Symfony document describes how to include assets in your page, namely using the asset package like so..

<img src="{{ asset('images/logo.png') }}" alt="Symfony!" />

<link href="{{ asset('css/blog.css') }}" rel="stylesheet" />

I have installed this package and trying to link to a css file in my /public directory.

I know Symfony recommends placing assets in an /assets folder at the root, but I would like to avoid this if possible. It makes more sense to me to place assets in the public directory.

My Twig base template is as follows:

<html>
    <head>
        <meta charset="UTF-8">
        <title>{% block title %}Welcome!{% endblock %}</title>

        {% block stylesheets %}
            <link href="{{ asset('public/css/main.css') }}" rel="stylesheet" />
        {% endblock %}
    </head>
    <body>
        {% block body %}{% endblock %}
        {% block javascripts %}{% endblock %}
    </body>
    <footer>footer</footer>
</html>

Problem

When I load the route/page/template, the linked css is rendered as a simple link from the root (as if Im linking it as <link href="public/css/main.css" rel="stylesheet" /> - there is of course no route set for public/* and this returns 404/Not Found.

Its as if the asset() function is not even used.

Ive tried

Restarting my local Symfony server
moving the asset to an assets folder at the root at adjusting the link accordingly
verifying that the asset package was installed (it is)
googling this issue (nothing for Symfony 4)

Questions

How can I let Symfony know that the public/* path is a filesystem path to assets, NOT a URL route, and include my assets successfully?
Is there such a feature to set a default location for assets other than the recommended /assets folder at the root?

Paths in the asset function should be relative to your public directory, not the project root.

So, pretending your server's docroot is public_html, and an asset is in public_html/css/main.css, the asset call would be {{ asset('css/main.css') }}.

Additional note: The asset function doesn't give you the ability to put assets outside the public directory. They must be in the public directory.

来源：https://stackoverflow.com/questions/48913004/including-assets-css-js-in-symfony-4-twig-template

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symfony4