Transmit a JavaScript object using the $.ajax method

Question

Transmit a JavaScript object using the $.ajax method

My goal is to pass a complex JavaScript object like the one below through a $.ajax request :

 var o = {
   a: 1, 
   b: 'dummy string', 
   c: ['a', 1, {}], 
   d: {dd: 1}, 
   e: new Date(), 
   f: function() {
        console.log('here');
   }
}

I am aware that I usually need to use JSON.stringify before sending it to my php script. However, JSON.stringify tends to remove properties it can't stringify :

JSON.stringify(o);

returns this ->

"{
  "a":1,
  "b":"dummy string",
  "c":["a",1,{}],
  "d":{"dd":1},
  "e":"2015-11-13T21:34:36.667Z"
}"

But what if I want to store the JavaScript object "o" as plain text in a MySQL column like this :

o = {
   a: 1, 
   b: 'dummy string', 
   c: ['a', 1, {}], 
   d: {dd: 1}, 
   e: new Date(), 
   f: function() {
        console.log('here');
   }
}

javascript ajax object

Answer 1

Answer №1

Here is a suggestion you can test out:

const obj = {
   property1: 'value1', 
   property2: 123, 
   property3: ['a', true, {}], 
   property4: {prop: 'example'}, 
   property5: new Date(), 
   property6: function() {
        console.log('testing');
   }
};

obj.property6 = obj.property6.toString();
const stringifiedObj = JSON.stringify(obj);
document.getElementById('output').innerHTML = stringifiedObj;

Fiddle: http://jsfiddle.net/abcdefg/

You may need to adjust the code to prevent overwriting functions when executing it. This quick example shows how properties are included in the resulting string.

As mentioned by a user named coder123 in the comments above, here's an illustration of using the replacer argument with JSON.stringify:

const obj = {
   property1: 'value1', 
   property2: 123, 
   property3: ['a', true, {}], 
   property4: {prop: 'example'}, 
   property5: new Date(), 
   property6: function() {
        console.log('testing');
   }
};

function customReplacer (key, value) {
  if (typeof value === "function") {
    return value.toString();
  }
  return value;
}

const modifiedStringifiedObj = JSON.stringify(obj, customReplacer);
document.getElementById('output').innerHTML = modifiedStringifiedObj;

Fiddle: http://jsfiddle.net/abcdefg/1/

Answer 2

Here is a suggestion you can test out:

const obj = {
   property1: 'value1', 
   property2: 123, 
   property3: ['a', true, {}], 
   property4: {prop: 'example'}, 
   property5: new Date(), 
   property6: function() {
        console.log('testing');
   }
};

obj.property6 = obj.property6.toString();
const stringifiedObj = JSON.stringify(obj);
document.getElementById('output').innerHTML = stringifiedObj;

Fiddle: http://jsfiddle.net/abcdefg/

You may need to adjust the code to prevent overwriting functions when executing it. This quick example shows how properties are included in the resulting string.

As mentioned by a user named coder123 in the comments above, here's an illustration of using the replacer argument with JSON.stringify:

const obj = {
   property1: 'value1', 
   property2: 123, 
   property3: ['a', true, {}], 
   property4: {prop: 'example'}, 
   property5: new Date(), 
   property6: function() {
        console.log('testing');
   }
};

function customReplacer (key, value) {
  if (typeof value === "function") {
    return value.toString();
  }
  return value;
}

const modifiedStringifiedObj = JSON.stringify(obj, customReplacer);
document.getElementById('output').innerHTML = modifiedStringifiedObj;

Fiddle: http://jsfiddle.net/abcdefg/1/

Answer 3

Answer №2

Two general options for handling JSON formatting:

You have the option of creating a custom toJSON method for any object:

Function.prototype.toJSON=function(){return String(this);}; 

JSON.stringify({a:1, b:function(){alert(123)}});

This approach results in the function being converted to a string, as shown here:

{"a":1,"b":"function (){alert(123)}"}

An important consideration is that the function literal is treated as a string rather than a function. To address this issue, you can utilize a reviver parameter with JSON.parse() if necessary.

Alternatively, a more effective solution involves using a replace argument with JSON.stringify():

JSON.stringify({a:1, b:function(){alert(123)}}, function(k,v){
  if(typeof v==="function") return String(v);
  return v;
});

As depicted above, this method yields the following output:

{"a":1,"b":"function (){alert(123)}"}

This technique stands out because it does not require modifications to built-in or instance objects.

Answer 4

Two general options for handling JSON formatting:

You have the option of creating a custom toJSON method for any object:

Function.prototype.toJSON=function(){return String(this);}; 

JSON.stringify({a:1, b:function(){alert(123)}});

This approach results in the function being converted to a string, as shown here:

{"a":1,"b":"function (){alert(123)}"}

An important consideration is that the function literal is treated as a string rather than a function. To address this issue, you can utilize a reviver parameter with JSON.parse() if necessary.

Alternatively, a more effective solution involves using a replace argument with JSON.stringify():

JSON.stringify({a:1, b:function(){alert(123)}}, function(k,v){
  if(typeof v==="function") return String(v);
  return v;
});

As depicted above, this method yields the following output:

{"a":1,"b":"function (){alert(123)}"}

This technique stands out because it does not require modifications to built-in or instance objects.

Transmit a JavaScript object using the $.ajax method

Answer №1

Answer №2

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