带有JSON数据的jQuery条件

Question

I have some JSON data where there is a field like such:

"first_date": "2015-06-02"

In jQuery, I'm wanting to basically say something like this:

if( valueOfFirstDate.substring(5, 6) == "06" ){
    //change 06 to "June"
}

How would I go about grabbing the value of that first_date field?

Answer 1

You could use JSON.parse() to convert your string to an object

var json = '{"first_date": "2015-06-02"}';
var obj = JSON.parse(json);
if(obj.first_date.substring(5, 6) == "06" ){
...
}

Answer 2

Just write something like that:

JsonObject.first_date

That's it. here your JsonObject is just any object of JavaScript.

Answer 3

You could generalize this for all months:

 var obj = { "first_date": "2015-06-02" }, d = obj['first_date'].split('-'), months = ['', 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'June', 'July', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec']; obj['first_date'] = d[0] + '-' + months[ +d[1] ] + '-' + d[2]; alert( JSON.stringify(obj, null, 4) ); 

Answer 4

You don't need jQuery for this. Plain old javascript will work.

If you're given a json object then you can access the value with the key.

var obj = {
  "first_date" : "2015-06-02"
}

if (obj["first_date"].substring(5, 6) == "06") {
  //your code here
}

I would recommend that if you want to work with dates to use objects instead. It's always better to work with objects rather than strings. You can form a javascript object from a date string as well. Check out Mozilla Dev Documentation Here