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# parse-json [](https://travis-ci.org/sindresorhus/parse-json) > Parse JSON with more helpful errors ## Install ``` $ npm install --save parse-json ``` ## Usage ```js var parseJson = require('parse-json'); var 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 at 3:1 in foo.json } ^ */ // 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 at 3:1 in foo.json } ^ */ ``` ## 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](http://sindresorhus.com)