Identifying the difference between var and JSON.stringify

Question

Identifying the difference between var and JSON.stringify

Take a look at this code snippet:

var data = JSON.stringify({
    id: _id,
    ReplyId: _idComment
})
openDialog(_url, data, $('#div-modal1'));

function openDialog(url, Id, div) {
    //How can we identify if variable Id is of type JSON.stringify?

    $.ajax({
        url: url,
        type: "Get",
        data: { id: Id },
    }).done(function (result) {
        if (result.status == false) {
            ShowMessage('warning', result.message, "error")

        } else {
            div.html(result);

            div.dialog("open");

        }
    });
}

Example usage for an array:

if (grid instanceof Array)

Is there a way to determine if a variable is of type JSON.stringify in the code?

javascript json

Answer 1

Answer №1

JSON.stringify function converts objects into strings:

JSON.stringify({name: "John"});
// results in "{"name":"John"}"

To verify if a string was created by JSON.stringify, you can check its validity as JSON using JSON.parse.

var isJson = true;

try {
  JSON.parse(data);
} catch (error) {
  // If an error occurs, `data` is not valid JSON
  isJson = false;
}

if (isJson) {
  // Execute code assuming `data` is a JSON string
} else {
  // Otherwise, execute code considering `data` is not a JSON string
}

Answer 2

JSON.stringify function converts objects into strings:

JSON.stringify({name: "John"});
// results in "{"name":"John"}"

To verify if a string was created by JSON.stringify, you can check its validity as JSON using JSON.parse.

var isJson = true;

try {
  JSON.parse(data);
} catch (error) {
  // If an error occurs, `data` is not valid JSON
  isJson = false;
}

if (isJson) {
  // Execute code assuming `data` is a JSON string
} else {
  // Otherwise, execute code considering `data` is not a JSON string
}

Identifying the difference between var and JSON.stringify

Answer №1

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