Answers for "$post in jquery example"

jquery ajax $.post with data

$.post('http://example.com/form.php', {category:'client', type:'premium'}, function(response){ 
      alert("success");
      $("#mypar").html(response.amount);
});

jquery $.post

// Assign handlers immediately after making the request,
// and remember the jqxhr object for this request
var jqxhr = $.post( "example.php", function() {
  alert( "success" );
})
  .done(function() {
    alert( "second success" );
  })
  .fail(function() {
    alert( "error" );
  })
  .always(function() {
    alert( "finished" );
  });
 
// Perform other work here ...
 
// Set another completion function for the request above
jqxhr.always(function() {
  alert( "second finished" );
});

post method javascript code

const postData = async ( url = '', data = {})=>{
    console.log(data);
      const response = await fetch(url, {
      method: 'POST', 
      credentials: 'same-origin',
      headers: {
          'Content-Type': 'application/json',
      },
     // Body data type must match "Content-Type" header        
      body: JSON.stringify(data), 
    });

      try {
        const newData = await response.json();
        console.log(newData);
        return newData;
      }catch(error) {
      console.log("error", error);
      }
  }

reference self in ajax callback

$.ajax({
    context: this,
    type: 'post',
    url: '<?php echo site_url('user/accept_deny_friendship_request')?>',
    data: 'action='+$action+'&user_id='+$user_id,
    success: function(response){
       //can access this now!
    }
});