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# parse-json [](https://travis-ci.org/sindresorhus/parse-json)
> Parse JSON with more helpful errors
## Install
```
$ npm install parse-json
```
## Usage
```js
const parseJson = require('parse-json');
const json = '{\n\t"foo": true,\n}';
JSON.parse(json);
/*
undefined:3
}
^
SyntaxError: Unexpected token }
*/
parseJson(json);
/*
JSONError: Trailing comma in object at 3:1
}
^
*/
parseJson(json, 'foo.json');
/*
JSONError: Trailing comma in object in foo.json:3:1
}
^
*/
// You can also add the filename at a later point
try {
parseJson(json);
} catch (err) {
err.fileName = 'foo.json';
throw err;
}
/*
JSONError: Trailing comma in object in foo.json:3:1
}
^
*/
```
## API
### parseJson(input, [reviver], [filename])
#### input
Type: `string`
#### reviver
Type: `Function`
Prescribes how the value originally produced by parsing is transformed, before being returned. See [`JSON.parse` docs](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/parse#Using_the_reviver_parameter
) for more.
#### filename
Type: `string`
Filename displayed in the error message.
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)
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