@swc-node/register

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Usage

``ts
const { register } = require('@swc-node/register/register')

register({
...
})
`

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`
node -r @swc-node/register index.ts
`

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`
mocha --require @swc-node/register --watch-extensions ts,tsx "test/*/.{ts,tsx}" [...args]
`

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`json
// package.json

{
"ava": {
"extensions": ["ts", "tsx"],
"require": ["@swc-node/register"],
"files": ["packages/*/.spec.{ts,tsx}"]
}
}
`

Read tsconfig.json

set SWC_NODE_PROJECT or TS_NODE_PROJECT env:

`bash
SWC_NODE_PROJECT=./tsconfig.test.json mocha --require @swc-node/register --watch-extensions ts,tsx "test/*/.{ts,tsx}" [...args]
`

@swc-node/register respect the following option in tsconfig:

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@swc-node/register respect the extends key in tsconfig.json, and use the merged values.

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`ts
switch (target) {
case ts.ScriptTarget.ES3:
return 'es3'
case ts.ScriptTarget.ES5:
return 'es5'
case ts.ScriptTarget.ES2015:
return 'es2015'
case ts.ScriptTarget.ES2016:
return 'es2016'
case ts.ScriptTarget.ES2017:
return 'es2017'
case ts.ScriptTarget.ES2018:
return 'es2018'
case ts.ScriptTarget.ES2019:
return 'es2019'
case ts.ScriptTarget.ES2020:
case ts.ScriptTarget.ES2021:
case ts.ScriptTarget.ES2022:
case ts.ScriptTarget.ESNext:
case ts.ScriptTarget.Latest:
return 'es2020'
case ts.ScriptTarget.JSON:
return 'es5'
}
`

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If filename endsWith .jsx or .tsx, always set the jsx: true in swc config regards the jsx option in tsconfig.
If filename not endsWith .jsx or .tsx, set the jsx: Boolean(tsconfig.compilerOptions.jsx) in swc config.

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> notes, if compilerOptions.module higher than es2020, the dynamicImport in swc config will be set to true.

`ts
switch (moduleKind) {
case ts.ModuleKind.CommonJS:
return 'commonjs'
case ts.ModuleKind.UMD:
return 'umd'
case ts.ModuleKind.AMD:
return 'amd'
case ts.ModuleKind.ES2015:
case ts.ModuleKind.ES2020:
case ts.ModuleKind.ESNext:
case ts.ModuleKind.None:
return 'es6'
case ts.ModuleKind.System:
throw new TypeError('Do not support system kind module')
}
`

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Respect the boolean value in tsconfig.

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Respect the boolean value in tsconfig.

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Respect the boolean value in tsconfig.

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TypeScript gives files list to @swc-node/register, if parse tsconfig.json failed or files list empty, @swc-node/register will transform all files which were required.

And if failed to parse tsconfig.json, @swc-node/register` will print warning which contains failed reason.