Untitled

var post_id = 112;
action = 'views';
$.ajax({
    url: 'index.php',
    type: 'post',
    data: {
        'action': action,
        'post_id': post_id
    },
    success: function(data){
        res = JSON.parse(data);

    }
});

// this is resulting as follows
// responseText: "<!DOCTYPE html>↵<html lang="en-US" class="no-js">↵.....
// and getting error as

/* Uncaught SyntaxError: Unexpected token < in JSON at position 0
    at JSON.parse (<anonymous>)
    at Object.success (<anonymous>:9:16) */