README.md

install

``bash
yarn add err-cause
yarn-tool add err-cause
yt add err-cause
`

https://github.com/tc39/proposal-error-cause

`typescript
test(isSupportedErrorCause: node = ${process.versions.node}, v8 = ${process.versions.v8}, () =>
{

let actual = isSupportedErrorCause();
let expected = gte(process.versions.node, '16.9.0') ? true : expect.any(Boolean);

console.log(isSupportedErrorCause = ${actual})

expect(actual).toEqual(expected);

});

test(errCause, () =>
{
const cause = new Error();
const err = new Error();

let actual = errCause(err, cause);

expect(actual).toHaveProperty('cause', cause);

});
``