Troubleshooting: Failed to Locate Preset es2015 in Directory - Fix Error

If you are a developer who uses Babel to transpile your code, you may come across the error message "Failed to Locate Preset 'es2015' in Directory" when running your project. This error occurs when Babel cannot find the preset for the specified environment, which in this case is "es2015". Fortunately, this error can be fixed with a few simple steps.

Step-by-Step Solution

Check if you have installed "babel-preset-es2015" as a dependency in your project. You can do this by running the following command in your project directory:

npm ls babel-preset-es2015

If you see the output "babel-preset-es2015@", then proceed to step 2. If you see an error message saying that the package is not installed, run the following command to install it:

npm install babel-preset-es2015 --save-dev

Ensure that your ".babelrc" file is properly configured. It should include the following:

  "presets": ["es2015"]

If you are using Webpack, make sure that the "babel-loader" is installed and properly configured in your webpack.config.js file. Here is an example configuration:

module: {
  rules: [
      test: /\.js$/,
      exclude: /(node_modules|bower_components)/,
      use: {
        loader: 'babel-loader',
        options: {
          presets: ['es2015']
  1. Finally, restart your development server and try running your project again. The error message should now be resolved.


Q: What does the "es2015" preset do?

A: The "es2015" preset is used to transpile ECMAScript 2015 (ES6) code to ES5.

Q: Why is the preset not being found?

A: This error can occur if the preset is not installed as a dependency in your project or if it is not configured properly in your ".babelrc" file.

Q: Can I use a different preset instead of "es2015"?

A: Yes, you can use different presets depending on the environment you are targeting. For example, if you are targeting a newer version of ECMAScript, you can use the "env" preset.

Q: What is Babel?

A: Babel is a JavaScript compiler that transforms code written in newer versions of ECMAScript into a compatible version that can run in older browsers and environments.

Q: Why do I need to install "babel-preset-es2015" as a dev dependency?

A: "babel-preset-es2015" is a development dependency because it is only needed during the development process to transpile your code. It is not needed in production environments.

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