Node v13 / Jest / ES6 — native support for modules without babel or esm
Yes, it is possible from [email protected]
. From this version, there is a native support of esm, so you will not have to transpile your code with babel anymore.
It is not documented yet, but according to this issue you have to do 3 easy steps to achieve that (At the time of writing this answer):
- Make sure you don't transform away
import
statements by settingtransform: {}
in your jest config file - Run
node@^12.16.0 || >=13.2.0
with--experimental-vm-modules
flag - Run your test with
jest-environment-node
orjest-environment-jsdom-sixteen
.
So your jest config file should contain at least this:
export default {
testEnvironment: 'jest-environment-node',
transform: {}
...
};
And to set --experimental-vm-modules
flag, you will have to run Jest from package.json
as follows (I hope this will change in the future):
"scripts": {
"test": "node --experimental-vm-modules node_modules/jest/bin/jest.js"
}
I hope, this answer was helpful to you.
I followed the tips provided in the accepted answer, but I added the property "type": "module"
in my package.json
in order to jest works properly. This is what I done:
In package.json
:
"devDependencies": {
"jest": "^26.1.0",
"jest-environment-jsdom-sixteen": "^1.0.3",
"jest-environment-node": "^26.1.0"
},
"scripts": {
"test": "node --experimental-vm-modules node_modules/jest/bin/jest.js"
},
"type": "module",
"jest": {
"transform": {},
"testEnvironment": "jest-environment-jsdom-sixteen"
}