84 lines
1.2 KiB
Markdown
84 lines
1.2 KiB
Markdown
# parse-json [](https://travis-ci.org/sindresorhus/parse-json)
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> Parse JSON with more helpful errors
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## Install
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```
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$ npm install --save parse-json
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```
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## Usage
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```js
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var parseJson = require('parse-json');
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var json = '{\n\t"foo": true,\n}';
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JSON.parse(json);
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/*
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undefined:3
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}
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^
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SyntaxError: Unexpected token }
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*/
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parseJson(json);
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/*
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JSONError: Trailing comma in object at 3:1
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}
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^
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*/
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parseJson(json, 'foo.json');
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/*
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JSONError: Trailing comma in object at 3:1 in foo.json
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}
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^
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*/
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// you can also add the filename at a later point
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try {
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parseJson(json);
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} catch (err) {
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err.fileName = 'foo.json';
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throw err;
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}
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/*
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JSONError: Trailing comma in object at 3:1 in foo.json
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}
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^
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*/
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```
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## API
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### parseJson(input, [reviver], [filename])
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#### input
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Type: `string`
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#### reviver
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Type: `function`
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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
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) for more.
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#### filename
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Type: `string`
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Filename displayed in the error message.
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## License
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MIT © [Sindre Sorhus](http://sindresorhus.com)
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