JSON.parse 错误（未捕获的 SyntaxError：JSON 中的意外标记 o 在 position 1）

Question

    $.getJSON(staticMS, function(data) {
        stockData = data.products_and_categories;
        console.log(stockData);
        var typeData = JSON.parse(stockData)
        console.log(typeData.itemType);
    });

Not sure whats wrong with this, I keep getting a "Uncaught SyntaxError: Unexpected token o in JSON at position 1" error. Trying to access part (itemType is specific earlier in the script) under the products_and_categories part of JSON file.

Tables under products and categories (after i click on 'object' in console):

Accessories: (8) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]

Hats: (6) [{…}, {…}, {…}, {…}, {…}, {…}]

Shirts: (7) [{…}, {…}, {…}, {…}, {…}, {…}, {…}]

Pants: (5) [{…}, {…}, {…}, {…}, {…}]

Answer 1

As Sajeeb commented, " stockData is not a valid JSON string." In fact, stockData is likely a JS object because

1) it's a field on parsed JSON, and JSON doesn't usually contain nested JSON

2) JSON.parse casts it's param to a string. A JS object stringified is '[object Object]' . Parsing this would produce the error you saw, 'Unexpected token o in JSON at position 1'.

If my assumption is right, then all you need to do is remove the nested JSON.parse :

  $.getJSON(staticMS, function(data) {
        stockData = data.products_and_categories;
        console.log(stockData);
        var typeData = stockData;
        console.log(typeData.itemType);
    });