Cannot find module babel-preset-es2015

Question

Getting same error again again: Error: Cannot find module 'babel-preset-es2015' .

Full error log:

 ERROR in ./ main.js Module build failed (from ./node_modules/babel-loader/lib/index.js): Error: Cannot find module 'babel-preset-es2015' from 'C:\Users\hp\Desktop\reactApp' at Function.module.exports [as sync] (C:\Users\hp\Desktop\reactApp\node_modules\resolve\lib\sync.js:43:15) at resolveStandardizedName (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\files\plugins.js:101:31) at resolvePreset (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\files\plugins.js:58:10) at loadPreset (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\files\plugins.js:77:20) at createDescriptor (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:154:9) at items.map (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:109:50) at Array.map () at createDescriptors (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:109:29) at createPresetDescriptors (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:101:10) at passPerPreset (C:\Users\hp\Desktop\reactApp\node_modules\@babel\core\lib\config\config-descriptors.js:58:96) @ multi (webpack)-dev-server/client? http://localhost:8080  (webpack)/hot/dev-server.js ./ main.js main[2]

Answer 1

For Babel version 6 the package name is babel-preset-es2015 and for Babel version 7 the package name is @babel/preset-es2015 .

From the error it seems that you're using version 7. The es20XX-presets are deprecated, so I recommend you switch to @babel/preset-env .

First install the preset (using npm ):

 npm install --save-dev @babel/preset-env

Then add the preset to your .babelrc

 { "presets": ["@babel/preset-env"] }

Answer 2

Thing in that the babel 7 uses @babel/preset-env . Other presets are deprecated Here saying about this https://babeljs.io/docs/en/v7-migration#yearly -preset-deprecations-blog-2017-12-27-nearing-the-70-releasehtml-deprecated-yearly-presets-eg-babel-preset-es20xx

You should specify in a configuration file (I don't know if you are using Webpack or something else) preset as "@babel/preset-env". Install it through npm install --save-dev @babel/preset-env

For example, you are using Webpack module bundler. In that case, specify like this:

 use: { loader: "babel-loader", options: { presets: ["@babel/preset-env"] } }

Here is a documentation https://webpack.js.org/loaders/babel-loader/ if you suddenly will need.

Happy coding!