WebpackTag

WebpackTag is an ASP.NET Core Tag Helper for rendering links to CSS and JS files compiled via Webpack

• Supports both webpack-manifest-plugin (as used by Create React App) and assets-webpack-plugin.
• Supports loading manifest from Webpack devserver in development.
• Renders preload headers for improved performance. This can be used to support HTTP/2 Server Push in Nginx.

Usage

Install the WebpackTag library using NuGet

Add the WebpackTag services to your Startup.cs:

using WebpackTag;
...
public void ConfigureServices(IServiceCollection services)
{
	services.AddWebpackTag();

Import the tag helpers in your Views/_ViewImports.cshtml file:

@addTagHelper *, WebpackTag

Then use the tag helpers in your view!

<webpack-styles />
<webpack-scripts />

These tag helpers will look for files called webpack-assets.json or asset-manifest.json in your wwwroot or SPA root directory, parse the contents, and render the correct <link> or <style> tags.

Note that when using assets-webpack-plugin, the entrypoints option should be enabled.

Multiple entry points

If your app has multiple entry points, you may specify the entry point name when using the tag

<webpack-styles entry="first" />

Configuration

Additional configuration can be performed when registering the services:

services.AddWebpackTag(options =>
{
	// ...
});

The following configuration options are available:

• DevServerPort: Port the Webpack devserver is running on. If this is configured, the tag helpers will try hitting http://localhost:{port}/asset-manifest.json to load the manifest.
• BaseUrl: Sets a string to prefix the generated URLs with. For example, this can be used to use a separate CDN domain in prod:

public class Startup
{
	private readonly IWebHostEnvironment _env;

	public Startup(IConfiguration configuration, IWebHostEnvironment env)
	{
		_env = env;
		Configuration = configuration;
	}

	public void ConfigureServices(IServiceCollection services)
	{
		services.AddWebpackTag(options =>
		{
			options.BaseUrl = _env.IsDevelopment() ? "/" : "https://cdn.example.com/";
		});
		// ...

Samples

This repository contains two samples:

• WebpackTag.Samples.React: Uses the ASP.NET Core 3.0 React project template, which uses Create React App.
• WebpackTag.Samples.WebpackAssets: Basic example using assets-webpack-plugin.