A JS implementation of JSONPath


Analyse, transform, and selectively extract data from JSON documents (and JavaScript objects).

npm install JSONPath

In node.js:

var jsonPath = require('JSONPath');
jsonPath.eval(obj, path);

For browser usage you can directly include lib/jsonpath.js, no browserify magic necessary:

<script type="text/javascript" src="lib/jsonpath.js"></script>
<script type="text/javascript">
    jsonPath.eval(obj, path);

Given the following JSON, taken from http://goessner.net/articles/JsonPath/ :

  "store": {
    "book": [
        "category": "reference",
        "author": "Nigel Rees",
        "title": "Sayings of the Century",
        "price": 8.95
        "category": "fiction",
        "author": "Evelyn Waugh",
        "title": "Sword of Honour",
        "price": 12.99
        "category": "fiction",
        "author": "Herman Melville",
        "title": "Moby Dick",
        "isbn": "0-553-21311-3",
        "price": 8.99
        "category": "fiction",
        "author": "J. R. R. Tolkien",
        "title": "The Lord of the Rings",
        "isbn": "0-395-19395-8",
        "price": 22.99
    "bicycle": {
      "color": "red",
      "price": 19.95
/store/book/author$.store.book[*].authorthe authors of all books in the store
//author$..authorall authors
/store/*$.store.*all things in store, which are some books and a red bicycle.
/store//price$.store..pricethe price of everything in the store.
//book[3]$..book[2]the third book
//book[last()]$..book[(@.length-1)]the last book in order.
//book[position()<3]$..book[0,1]the first two books
//book[isbn]$..book[?(@.isbn)]filter all books with isbn number
//book[price<10]$..book[?(@.price<10)]filter all books cheapier than 10
//*[price>19]/..$..[?(@.price>19)]^categories with things more expensive than 19
//*$..*all Elements in XML document. All members of JSON structure.

Running the tests on node: npm test. For in-browser tests:

  • Ensure that nodeunit is browser-compiled: cd node_modules/nodeunit; make browser;
  • Serve the js/html files:
    node -e "require('http').createServer(function(req,res) { \
        var s = require('fs').createReadStream('.' + req.url); \
        s.pipe(res); s.on('error', function() {}); }).listen(8082);"

MIT License.