Skip to main content

Angular production build error–Index html generation failed

A colleague asked me for help with a specific Angular build error he got. Everything was working fine during development but when he tried to create a production build using ng build --configuration production --aot it failed with the following error message

Index html generation failed.

Let's have a look at the configuration in the angular.json:

If we compare this configuration with the development version the biggest difference between the two is that for production the optimization setting was enabled.

Let’s have a look inside the documentation to see what this setting does:

This option enables various optimizations of the build output, including:

  • Minification of scripts and styles
  • Tree-shaking
  • Dead-code elimination
  • Inlining of critical CSS
  • Fonts inlining

Aha! I could guess where the problem appears. As we had removed the index.html from our Angular project (we are not using the default index.html but have an ASP.NET Core MVC page that is used to serve the necessary scripts and styling), the inlining part of the optimization is probably causing the issue. As the inlined CSS cannot be written to a file that doesn’t exist, it fails with the error message above.

To fix it, we had to finetune the optimization settings and disable the inlining:

Labels:

Popular posts from this blog

Podman– Command execution failed with exit code 125

After updating WSL on one of the developer machines, Podman failed to work. When we took a look through Podman Desktop, we noticed that Podman had stopped running and returned the following error message: Error: Command execution failed with exit code 125 Here are the steps we tried to fix the issue: We started by running podman info to get some extra details on what could be wrong: >podman info OS: windows/amd64 provider: wsl version: 5.3.1 Cannot connect to Podman. Please verify your connection to the Linux system using `podman system connection list`, or try `podman machine init` and `podman machine start` to manage a new Linux VM Error: unable to connect to Podman socket: failed to connect: dial tcp 127.0.0.1:2655: connectex: No connection could be made because the target machine actively refused it. That makes sense as the podman VM was not running. Let’s check the VM: >podman machine list NAME         ...
Read more

Azure DevOps/ GitHub emoji

I’m really bad at remembering emoji’s. So here is cheat sheet with all emoji’s that can be used in tools that support the github emoji markdown markup: All credits go to rcaviers who created this list.
Read more

VS Code Planning mode

After the introduction of Plan mode in Visual Studio , it now also found its way into VS Code. Planning mode, or as I like to call it 'Hannibal mode', extends GitHub Copilot's Agent Mode capabilities to handle larger, multi-step coding tasks with a structured approach. Instead of jumping straight into code generation, Planning mode creates a detailed execution plan. If you want more details, have a look at my previous post . Putting plan mode into action VS Code takes a different approach compared to Visual Studio when using plan mode. Instead of a configuration setting that you can activate but have limited control over, planning is available as a separate chat mode/agent: I like this approach better than how Visual Studio does it as you have explicit control when plan mode is activated. Instead of immediately diving into execution, the plan agent creates a plan and asks some follow up questions: You can further edit the plan by clicking on ‘Open in Editor’: ...
Read more