Update a json object using javascript

Question

I am having problems trying to sort this on my own.

I have a hidden field containing a small amount of json.

I populate a variable using

 $(document).ready(function() {
var data = $("#result").text();
var j = JSON.parse(data);
j.my_item.total_price==="2222";
console.log(j.my_item.total_price);

});

the variable j is showing the correct data, I just don't have a clue how to update the total_price

Can anyone suggest what I need to do to enable me to update total_price?

Did you try j.my_item.total_price="2222"; ? – Cheery Jan 25 '12 at 06:23 — Cheery, Jan 25 '12 at 06:23

score 9 · Accepted Answer · answered Jan 25 '12 at 06:25

You can assign to an object property just like any other variable:

j.my_item.total_price = "2222";

Or the alternative (array-like) syntax:

j['my_item']['total_price'] = "2222";

Or mix-and-match:

j.my_item['total_price'] = "2222";
j['my_item'].total_price = "2222";

score 3 · Answer 2 · edited May 23 '17 at 12:33

3

$(document).ready(function() {
var data = $("#result").text();
var j = JSON.parse(data);
j.my_item.total_price="2222";
console.log(j.my_item.total_price);

});

=== isn't an assignment operator, it's a type-strict comparison operator.

See here:

Difference between == and === in JavaScript

edited May 23 '17 at 12:33

Community

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answered Jan 25 '12 at 06:24

mowwwalker

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Update a json object using javascript

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