babeljs - Read For Learn

Error: Couldn’t find preset “es2015” relative to directory “/Users/username”

You only need to install babel-preset-es2015: CLI usage example:

“You may need an appropriate loader to handle this file type” with Webpack and Babel

You need to install the es2015 preset: and then configure babel-loader:

‘import’ and ‘export’ may only appear at the top level

I got this error when I was missing a closing bracket. Simplified recreation:

Couldn’t find preset “env” relative to directory

So far I have been unsuccessful in an attempt to use the env preset. I browsed the git issues that others have raised such as this, and implemented some of the suggestions that appeared to work for others, but no luck so far. Here’s what I’m working with: package.json And here is the error: Anything … Read more

Jest TypeError: Path must be a string. Received undefined

I solved this issue using: npm uninstall -g jest npm install -g jest npm cache clean npm install

SyntaxError: ‘import’ and ‘export’ may appear only with ‘sourceType: module’ – Gulp

Older versions of Babel came with everything out of the box. The newer version requires you install whichever plugins your setup needs. First, you’ll need to install the ES2015 preset. Next, you need to tell babelify to use the preset you installed. Source

How to resolve “Cannot use import statement outside a module” in jest

Also using Babel, Typescript and Jest. Had the same failure, driving me crazy for hours. Ended up creating a new babel.config.js file specifically for the tests. Had a large .babelrc that wasn’t getting picked up by jest no matter what i did to it. Main app still uses the .babelrc as this overrides babel.config.js files. Install jest, ts-jest and babel-jest: babel.config.js (only used by … Read more