A second build is triggered since alpha 17

[zlk89]

Current behaviour 💣

Seeing webpack got triggered a second build, since html-webpack-plugin removes a local file after initial build:

FILES REMOVED:
  data:text/javascript,__webpack_public_path__ = htmlWebpackPluginPublicPath;

It was working fine on alpha 16 version.

Expected behaviour ☀️

No file removed after initial build

Reproduction Example 👾

https://codesandbox.io/s/html-webpack-plugin-5x-alpha-forked-57fug?file=/webpack.config.js

You will see it triggers a second build right after initial one under development mode.
(There is a bug in codesandbox, you might need to open a new terminal and run yarn start to see the webpack compilation log)

Environment 🖥

Node.js v12.16.1
darwin 19.6.0
npm version: 6.13.4
webpack: 5.11.1
html-webpack-plugin: 5.0.0-alpha.17

[jantimon]

Hey @zlk89

thank you so much for your bug report - this bug is already known..

The reason is that it is using a new webpack 5 feature which is not working correctly with watchpack.
The webpack core team is trying to fix it:

webpack/webpack#12283

[joealden]

FYI, webpack/webpack#12283 was resolved in [email protected]. @zlk89 could you please verify if the problem you were experiencing has been resolved?

[zlk89]

tried 5.12.3, looks like it works now!

[artembatura]

Issue still reproducible with Yarn 2. With NPM works fine.

{
  "html-webpack-plugin": "5.0.0-beta.6",
  "webpack": "5.16.0",
}

[jantimon]

maybe yarn installs old versions?

can you please try if the reproduction example without html-webpack-plugin from from webpack/webpack#12283 fails also for yarn 2?

[artembatura]

@jantimon I can't reproduce problem with your example and Yarn 2. But I can still reproduce it by using simple config:

module.exports = {
  ...
  plugins: [
    new HtmlWebpackPlugin(),
  ]
};

So commenting line with html-webpack-plugin does fix the issue.

After investigation I think this problem is not related to html-webpack-plugin directly, because I can reproduce it even with file-loader, css and Babel stuff. I will create issue in webpack repo

[artembatura]

Created issue in webpack repository: webpack/webpack#12483

[jantimon]

thank you :)