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# error-stack

Parse and manipulate `error.stack`

## Install

```sh
$ npm i error-stack
```

## Usage

```js
const parse = require('error-stack')
const {stack} = new Error('foo')

console.log(stack)
// Error: foo
//     at repl:1:11
//     at Script.runInThisContext (vm.js:123:20)

const parsed = parse(stack)

parsed.type // Error

parsed.message  // foo

parsed.traces
// [
//   {
//     callee: undefined,
//     source: 'repl',
//     line: 1,
//     col: 11
//   },
//   {
//     callee: 'Script.runInThisContext',
//     source: 'vm.js',
//     line: 123,
//     col: 20
//   }
// ]

parsed
.filter(({callee}) => !!callee)
.format()
// Error: foo
//     at Script.runInThisContext (vm.js:123:20)
```

### parsed.type `string`

Error type

### parsed.message `string`

The message used by Error constructor

### parsed.traces `Array<Trace>`

```ts
interface Source {
  // The source of the the callee
  source: string
  line?: number
  col?: number
}

interface Trace extends Source{
  callee: string
  // Whether the callee is 'eval'
  eval?: boolean
  // The source location inside eval content
  evalTrace: Source
}
```

### parsed.filter(filterFunction): this

- **filterFunction** `Function` the same as the callback function of `Array.prototype.filter(callback)`

Filters the current traces

### parsed.format(): string

Format object `parsed`

## License

[MIT](LICENSE)