How to make mocha support ES6 module

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Mocha is a commonly used node testing framework, but it only supports commonjs modules. To make mocha support ES6 modules, you need the help of babel.

The version of the tool used in writing this article is:

Babel v7mocha v6.2

Installation dependency

$npm I-D @ babel/cli @ babel/core @ babel/preset-env @ babel/register

Babel configuration

Add a configuration in package.json or .babelrc:

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

Configuration command

Finally, configure the run command. Babel/register will be bound to the require module of node, and translation will be implemented when the code is running, so that the module syntax of ES6 can be supported:

"scripts": {"test": "mocha-require @ babel/register test/*.js",}

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