Confusion on how to work with module pattern

I am confused on how to work with module pattern (and design patterns in general) in Javascript.

I already wrote some functionning code in my application using module pattern that does what I want to, but it doesn't seem to be very modular to me, and I keep having this feeling that I am doing it wrong. I didn't manage to find any concrete and complete application example with any design pattern.

Here is how I work with it :

Let's say I have forms in my application that I'll use for different modules (post a thread, reply to a thread, comment the guests book), with some Javascript I'll give users some functionalities, as such as popping a smiley bubble and handling insertion of them in my forms, sending data posts to my server code to return the HTML code in order to add the message without reloading the page, I'll do something like that :

    let Form = function (selector_form, selector_textarea, selector_emoticonsButton, selector_postButton) {

      let form, textarea, emoticonsButton, postButton;
      let emoticonsBubble = new EmoticonsBubble()

      return {
        selectors: function () {
          return {
            form: function () { return selector_form },
            sendButton: function () { return selector_sendButton }
          }
        }
      
        setElements: function (obj) {
          form = $(obj).get(0);
          textarea = $(form).find(selector_textarea).get(0);
          emoticonsButton = $(form).find(emoticonsButton).get(0);
          postButton = $(form).find(selector_postButton).get(0);
          
          emoticonsBubble.setElements(form, emoticonsButton);
        },
        
        get: function () {
          return {
            form: function () { return form },
            //...
            emoticonsBubble: function () { return emoticonsBubble }
          }
        },
        
        post: function (moduleId, callback) {
          $.ajax({
          //parameters
          }).done(function (data) {
            callback(data);
          });
        }
      }
    }

    let EmoticonsBubble = function () {
       
      let thisContainerToAppendTo, thisTextarea;
      
      return {
        setElements: function (container, textarea) {
          thisContainerToAppendTo = container;
          thisTextarea = textarea;
        },
        
        pop: function () {
          this.ajax().pop(function (data) {
            $(thisContainerToAppendTo).append(data);
          });
        }
        
        insert: function (emoticon) {
          $(thisTextarea).append(emoticon);
        },
        
        ajax: function () {
          return {
            pop: function (callback) {
              $.ajax({
              //parameters
              }).done(function (data) {
                callback(data);
              });
            }
          }
        }
      }
    }

    // Events part

    let form = new Form('#threadForm', '.textarea', 'button[name="emoticons"]', 'button[name="send"]');
    let emoticonsBubble = form.get().emoticonsBubble();

    $(form.selectors().form()).on('click', function (e) {
      form.setElements(this);
    });

    $(form.selectors().sendButton()).on('click', function (e) {
      let moduleId = // retrieve module id, if it belongs to guests book, thread creation module or reply module
      form.post(moduleId, function (data) {
        // append data to something
      });
    });

    // etc for emoticons handling

Could you guys tell me how you would handle those functionalities and what may be wrong with my way of coding?