what-is-circular 

Like is-circular, but returns the path to the first circular reference found.

Installation

npm install what-is-circular

Usage

whatIsCircular(obj)

Returns an array that contains the path to the first circular reference found, or undefined if no circular reference is found.

Example

``js
var whatIsCircular = require('what-is-circular')

var circularObj = {
foo: 1,
bar: 2
}
// qux.baz is the circular reference
circularObj.qux = {
baz: circularObj
}

whatIsCircular(circularObj) // ['qux', 'baz']

var obj = {
foo: 1,
bar: 2,
qux: 3
}

whatIsCircular(obj) // undefined
`

License

Thanks to @tjmehta's is-circular for providing the tests and README for this project.

Thanks to @angus-c's just-is-circular` for contributing additional tests.