How to Include CSS into Bundled JS with esbuild for Svelte Projects

Discover how to merge CSS into a bundled JavaScript file using esbuild with Svelte for streamlined development in this easy-to-follow guide.
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How to Include CSS into Bundled JS with esbuild for Svelte Projects

When developing applications with Svelte, you might encounter a situation where your build process generates separate files for CSS and JavaScript. While this is common, there are times when you want to bundle CSS directly into your JavaScript file. This can simplify deployment and asset management. Many developers have faced this issue, wondering how they can configure their esbuild setup to achieve this.

In this guide, we’ll explore how to integrate CSS into a bundled JavaScript file using esbuild for Svelte projects.

The Problem

Here’s an example of a configuration that leads to this issue:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

The good news is that there is a fairly straightforward way to include CSS in your JavaScript bundle when using esbuild with Svelte. You just need to adjust the configuration in the Svelte plugin section of your esbuild setup.

Step-by-Step Guide

Modify the Svelte Plugin Configuration:
You need to add the compilerOptions with a specific setting for CSS:

[[See Video to Reveal this Text or Code Snippet]]

Full Configuration:
Here’s how your complete build configuration would look:

[[See Video to Reveal this Text or Code Snippet]]

Key Takeaways

By adding compilerOptions: { css: true } in the Svelte plugin configuration, you enable the inclusion of CSS directly in your JavaScript bundle.

This configuration leads to a more efficient build process since you won’t have to manage separate CSS files.

In conclusion, modifying your Svelte plugin configuration in esbuild is key to achieving bundled output. This small change can have a significant impact on the simplicity of your development process.

Let's make our builds smoother and more manageable! Happy coding!