AJAX is termed as Asynchronous Javascript And XML.Generally, we use following methods in ajax, jquery

• $.post
• $.ajax

In this tutorial, we will learn to pass dynamic key in both ajax method

1. $.post method

In this method, generally we use following code for ajax

$.post(url,{id_key:id_value,action:'add'}, function(data) {
	console.log(data)
})

Here id_value will be considered as variable whereas id_key will be considered as static. If you pass any dynamic value for id_key, it would not be considered.

Solution:

To use id_key as dynamic use it within a square bracket. You can use following code for it

var id_key='id';
var id_value=12;

$.post(url,{[id_key]:id_value,action:'add'}, function(data) {
	console.log(data)
})

2. $.ajax

In this method, generally we use following code for ajax

$.ajax({
	method: "POST",
	url: "abc.php",
	data: {id_key:id_value, action: 'add'},
})
.done(function(data) {
	console.log(data);
})

Here, id_value can be assigned dynamic values but id_key will remain static. To make id_key as dynamic, use it within square bracket. You can use following code for it.

var id_key='id';
var id_value=12;
$.ajax({
	method: "POST",
	url: "abc.php",
	data: {[id_key]:id_value, action: 'add'},
})
.done(function(data) {
	console.log(data);
})