Mocha is considering introducing experimental support for decorators in an upcoming release, though this feature may be modified before its official implementation

When attempting to perform a unit test using Mocha on Windows, I used the command below:

mocha --require ts-node/register test.spec.ts

An error occurred, showing:

error TS1219: Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning.

Despite having the following in my tsconfig.json file:

"experimentalDecorators": true,

Could anyone provide guidance on how I can reference the tsconfig.json file?

typescriptmocha.jsts-node

Answer №1

Within my package.json script, I define the location of my tsconfig.json file by specifying the environment variable TS_NODE_PROJECT with the help of cross-env:

Executing a command similar to the below example should resolve the decorator issue:

cross-env TS_NODE_PROJECT=<your-ts-config-json-file> mocha --require ts-node/register test.spec.ts

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