Webpack hot module replacement (HMR) sourcemaps not updated / new code not visible in dev tools

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I have set up HMR successfully, everything working, including proxying the backend site. The only issue remaining is, that I can't see the actual original code (ES2015) in the browser unless I do a full reload.

Did I miss something or is this not possible? I use 'cheap-module-eval-source-map', tried 'cheap-module-inline-source-map'. Is it even possible to provide sourcemaps in replaced modules, because they have to be evaluated?

There is an issue with HMR and updating the source maps in the DevTools. Typically, the source maps are cached by the browsers and since HMR does not trigger a full page reload, you are stuck with the outdated source map. As a workaround, you can reload the Chrome DevTools pressing alt+r. Apparently this works with cheap-module-source-map.

See https://github.com/webpack/webpack/issues/2478 for more information.

source maps, There is an issue with HMR and updating the source maps in the DevTools. Typically, the source maps are cached by the browsers and since HMR does not​  I've got HMR working well with babel-loader, react-hot-loader, webpack-dev-middleware and webpack-hot-middleware. As expected, the React component updates in browser after an incremental build. However, the sourcemap for JSX files (or other ES6 file) is not reflecting to the source code change, instead it stays unchanged.

Use webpack-dev-server -d --hot --inline

-d is shorthand for --debug --devtool source-map --output-pathinfo

--hot is for hot replacement of modules

And then dev-server will start generating sourcemaps and inject code on every change

Webpack Hot Module Replacement (HMR) doesn't update , Webpack Hot Module Replacement (HMR) doesn't update sourcemap #2478 /​webpack-hot-module-replacement-hmr-sourcemaps-not-updated-new-code-not-​visib I tried to disable and re-enable JS sourcemaps in Chrome dev-tool SourceMapDevToolPlugin not outputting full sourcemap during Hot  HMR can be used in development as a LiveReload replacement. webpack-dev-server supports a hot mode in which it tries to update with HMR before trying to reload the whole page. See the Hot Module Replacement guide for details. As with many other features, webpack's power lies in its customizability.

-d is a shortcut for the command below in webpack v.4.8.3

--debug --devtool cheap-module-eval-source-map --output-pathinfo

https://webpack.js.org/api/cli/#shortcuts

The thing that fixed it for me was setting the following in webpack.config.js:

devtool: "cheap-module-eval-source-map",

Webpack hot module replacement (HMR) sourcemaps not - iOS, Webpack hot module replacement (HMR) sourcemaps not updated / new code not visible in dev tools - webpack. This guide extends on code examples found in the Development guide.. Hot Module Replacement (or HMR) is one of the most useful features offered by webpack. It allows all kinds of modules to be updated at runtime without the need for a full refresh.

hot module replacement · webpack/docs Wiki · GitHub, This guide extends on code examples found in the Development guide. Hot Module Replacement (or HMR) is one of the most useful features offered by webpack. HMR is not intended for use in production, meaning it should only be used in All we need to do is update our webpack-dev-server configuration, and use  Some topics like Webpack hmr: __webpack_hmr 404 not found provides solutions that have no sense, plus aren't like my case. I'm using Cluod9 IDE, so I don't have a localhost, I have to define the host by hand somewhere.

Setting Up Webpack for React and Hot Module Replacement, The webpack repository contains an example showing the effect of all devtool variants. bundled code - You see all generated code as a big blob of code. eval-source-map - Each module is executed with eval() and a SourceMap is added as a The following options are not ideal for development nor production. Code Drip Recommended for you. Step By Step: Hot Module Replacement #7 - Webpack 4 - Duration: How to setup webpack dev server to use Hot Module Replacement

Hot Module Replacement, Webpack dev server, Hot reload and source maps — Easing the pain. maxModules: 0 // Set the maximum number of modules to be shown Basically hot reload feature is enabled but it doesn't know how to hot reload react code yet, as it automatically ensures it is not executed in production and the footprint is minimal. Webpack’s HMR along with React-Hot-Loader makes developing React apps very productive. But depending on the type of the React app (client and server) you are building, setting them up could be…

Comments
  • What browser are you using?
  • Chrome 47. Did you get refreshing of source-maps to work with HMR?