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HTML

              
                <html lang="pt-br">
<head>

    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
    <link rel='stylesheet' href="../css/all.css">
    <title>Chat</title>

</head>
<body>

    <div class="background-wrapper" id="main">
        
       

        <nav class= "profile-nav">  <!-- Navbar da esquerda, contém os perfis do usuário e de seus contatos/conversas -->


            <div class="profile-nav-header">   <!-- Logo do projeto -->
                <p>
                    
                    <span class="material-icons" id="logo">
                        maps_ugc
                    </span>
                    Chat <span class="p-subtitle">Plus</span>

                </p>
            </div>

            
            <div class="user-profile"> <!-- Área do perfil do usuário -->

                <div class="user-profile-img"  onclick="changeProfilePic()">

                    
                    <span class="material-icons" id="change-profile-pic">
                            photo_camera
                    </span>
                    

                </div>

                <p class="user-profile-name" id="user-name"> <!-- Display das informações do usuário -->
                    
                    Usuário

                    <p class="user-connection">  <!-- Botão responsável por exibir o status do usuáiro (Online/Offline) -->

                        <span class="material-icons" id="user-connection-icon" onclick="displayUserConnectStat()">
                            toggle_on
                        </span>
                        
                        <span id="user-profile-name">
                            Online
                        </span>
                    </p>
                  

                </p>

            </div>

            <div class="user-conversations"> <!-- Área de conversas com contatos do usuário -->

                <div class="conversations-header"> 
                    <p>
                        Conversas 
                    </p>
                  
                </div>

                <div class="conversations-main"> <!--Todos as conversas -->
                    

                   <ul class="conversations-main-list"> <!--Lista de conversas-->

                       <li class="contact-info" id="contact-selected">
                      
                            <div class="contact-profile-pic-bckg">

                                <div class="contact-profile-pic"></div>

                            </div>
                            <div class="contact-text-area">
                                <p class="contact-name">
                                    Chat Plus
                                </p>
                                <p class="contact-message">
                                    Olá! 😀😀 Esta é uma interface...
                                </p>
                            </div>
                        

                      
                       </li>

                       <li class="contact-info"   id= "new-message">
                        
                            <div class="contact-profile-pic-bckg">

                                <div class="contact-profile-pic"></div>

                            </div>
                            <div class="contact-text-area">
                                <p class="contact-name">
                                    Contato 1
                                </p>
                                <p class="contact-message">
                                    Mensagem nova!
                                </p>
                            </div>
                                <div class="conversation-notification-bckg">
                                    <div class="conversation-notification">
                                    8
                                    </div>
                                </div>
                            
                  
                        </li>
                        <li class="contact-info">
                        
                            <div class="contact-profile-pic-bckg">

                                <div class="contact-profile-pic"></div>

                            </div>
                            <div class="contact-text-area">
                                <p class="contact-name">
                                    Contato 2
                                </p>
                                <p class="contact-message">
                                    Nenhuma mensagem nova
                                </p>
                            </div>
                            
                  
                        </li>
                        <li class="contact-info">
                        
                            <div class="contact-profile-pic-bckg">

                                <div class="contact-profile-pic"></div>

                            </div>
                            <div class="contact-text-area">
                                <p class="contact-name">
                                    Contato 3
                                </p>
                                <p class="contact-message">
                                    Nenhuma mensagem nova
                                </p>
                            </div>
                            
                  
                        </li>
                        <li class="contact-info">
                        
                            <div class="contact-profile-pic-bckg">

                                <div class="contact-profile-pic"></div>

                            </div>
                            <div class="contact-text-area">
                                <p class="contact-name">
                                    Contato 4
                                </p>
                                <p class="contact-message">
                                    Não conversamos muito...
                                </p>
                            </div>
                            
                  
                        </li>

                     

                   </ul>



                </div>
                

            </div>


        </nav>

        <main class="chat-main-wrapper"> <!-- Área do chat -->

            <div class="chat-header"> <!--Informações sobre o contato selecionado para troca de mensagens -->

                <div class="chat-header-contact-master">
                    <div class="chat-header-contact-profile-pic"></div>
                   
                    <div class="chat-header-contact-name">
                        Chat Plus

                        <div class="chat-header-contact-connection-display">
                            Online
                        </div>
                    </div>
               
                </div>
                <div class="chat-header-contact-actions">

                    <span class="material-icons" id="video-call">
                        videocam
                    </span>
                    <span class="material-icons" id="chat-contact-messages-options">
                        more_vert
                    </span>

                </div>
               
                

            </div>
            
            <div class="chat-conversation-wrapper" id="chat-wrapper"> <!-- Área das mensagens -->
                <div class="contact-message-wrapper">
                    <div class="contact-message-box-style"></div> 
                    <div class="contact-message-box">
                        <div class="contact-message-box-p">
                           Olá! &#x1F600;&#x1F600; me chamo Gabriel e sou o desenvolvedor desta página, seja bem-vindo! Esta é uma interface gráfica que simula uma aplicação de um chat via web. O intuito é demonstrar o design e 
                           interação criados a partir dos meus conhecimentos em HTML, CSS e JavaScript puro.
                        </div>
                    </div>
                </div>
                <div class="contact-message-wrapper">
                    <div class="contact-message-box-style"></div> 
                    <div class="contact-message-box">
                        <div class="contact-message-box-p">
                           Aqui você pode interagir com alguns elementos para testar as animações e enviar mensagens e emojis.
                           Faça um teste! Para mais informações, envie 'saber mais'
                        </div>
                    </div>
                </div>
                     
           


            </div>
            

            <div class="chat-user-message-wrapper"> <!-- Área onde o usuário digita as mensagens -->

                <span class="material-icons" id="emoji" onclick="emojiWindow()">
                    sentiment_satisfied_alt
                </span>

                <p class="attach-file-wrapper">
                    
                    <input type="file" name="attach-file" id="attach-file-input">
                    <label for="attach-file-input" class="material-icons" id="attach-file" onclick="attachFile()">
                        attach_file
                    </label>
                </p>

               <div class="chat-user-message-form-wrapper">
                   <input type="text" name="" id="user-message-form" placeholder="Digite sua mensagem aqui">
               </div>

               <span class="material-icons" id="send-message" onclick="sendMessage()">
                    send
               </span>
               <div class="emojis-wrapper" id="emojis-wrapper"> <!-- Emojis container -->
                  
                <ul class="emoji-list">

                <li class="emoji-item" id="grinning-face" onclick="insertEmoji(emojiCode = 1)">&#x1F600;</li>  <!-- grinning face -->
                <li class="emoji-item" id="grinning-face-with-smiling-eyes" onclick="insertEmoji( emojiCode = 2)">&#x1F604;</li>  <!-- grinning face with smiling eyes -->
                <li class="emoji-item" id="grinning-face-with-sweat" onclick="insertEmoji( emojiCode =3)">&#x1F605;</li>  <!-- grinning face with sweat -->
                <li class="emoji-item" id="face-with-tears-of-joy" onclick="insertEmoji( emojiCode =4)">&#x1F602;</li>  <!-- face with tears of joy -->
                <li class="emoji-item" id="winking-face" onclick="insertEmoji( emojiCode = 5)">&#x1F609;</li>  <!-- winking face --> 
                <li class="emoji-item" id="face-blowing-a-kiss" onclick="insertEmoji(emojiCode = 6)">&#x1F618;</li>  <!-- face blowing a kiss -->
                <li class="emoji-item" id="angry-face" onclick="insertEmoji(emojiCode = 7)">&#x1F620;</li>  <!--angry face -->
                <li class="emoji-item" id="heart" onclick="insertEmoji(emojiCode = 8)">&#x1F49B;</li>  <!-- heart -->
                <li class="emoji-item" id="thumbs-up" onclick="insertEmoji(emojiCode = 9)">&#x1F44D;</li>  <!-- thumbs up -->
                <li class="emoji-item" id="thumbs-down" onclick="insertEmoji(emojiCode = 10)">&#x1F44E;</li>  <!-- thumbs down -->

                </ul>
            </div> 
                
            </div>
     

        </main>

        
    

    </div>

    <!-- Interfaces adicionais -->

    <div class="select-profile-pic-wrapper" id="select-profile-pic-menu">

       <div class="select-profile-pic" id="select-profile-pic">
        <p class="select-profile-pic-title">
            Selecionar imagem de perfil
            <span class="material-icons" id="close-select-profile-pic-menu" onclick="closeSelectProfilePicMenu()">
                close
            </span>

        </p>
            
            <div class="select-profile-pic-img-display">

                <div class="select-profile-pic-options">
              
                    <label for="select-pic" id="select-pic-btn">Procurar imagem</label>
                    <input type="file" name="Escolher imagem" id="select-pic" accept="image/*">
                  
    
                </div>
                
            </div>

            <div class="select-profile-pic-aplly-options">
                <input type="button" value="Aplicar" id="cancel-selected-profile-pic">
                <input type="button" value="Cancelar" id="cancel-selected-profile-pic">
            </div>
           
          

       </div>


    </div>
    
    <div class="get-started" id="login-screen">
       <p>
                    
                    <span class="material-icons" id="login-logo">
                        maps_ugc
                    </span>
                    Chat <span class="login-p-subtitle">Plus</span>
                 
                </p>
      
     
        <input type="text" name="email" id="email" placeholder="Email ou telefone" class="login-form">
        <input type="password" name="password" id="password" class="login-form" placeholder="Senha">
        <input type="button" value="Login" class="login-btn" onclick="login()">

    </div>
  

  


    <script src="../js/all.js">

    </script>

</body>
</html>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css2?family=Raleway:wght@300;400;500;700&display=swap');

*{
    margin: 0;
    padding:0;
    box-sizing: border-box;
}

body{
    background-color:#2f3542;
    font-family: 'Raleway', sans-serif;
    display: block;

   
}

.background-wrapper{
     
    margin: 5vh auto;
    background-color: #ffffff;
    width: 145vh;
    height: 90vh;
    display: none;
    flex-direction: row;

 
    
    
}

.profile-nav{
    max-width: 45vh;
    height: 100%;
    overflow-y: scroll;
    overflow-x: hidden;

}

.profile-nav-header p{
    display: flex;
    flex-direction: row;
    align-items: center;
    text-align: center;
    padding: 26.5px 20px;
    font-size: 20pt;
    color: #2f3542;
    font-family: 'Raleway';
    font-weight: 700;
    width: 100%;
    cursor: default;

 

}

.p-subtitle{
    color: #5352ed;
    padding: 0px 6px;
}

#logo{
    font-size: 26pt;
    padding: 0px 10px;
    color: #5352ed;

}

.user-profile{

    width: 100%;
    height: 22vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
 
    

}

.user-profile-img{
    background-color:rgba(211, 211, 211, 0.336);
    width: 10vh;
    height:10vh;
    border-radius: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
 
}

#change-profile-pic{
    font-size: 24pt;
    color:  #2f3542c5;
    display: none;
   
}
.user-profile-img:hover {
    background-color: #2f35422f;
}
.user-profile-img:hover > #change-profile-pic {

    display: block;
    transition: .3s;
  

}

.user-profile-name{
    font-size: 14pt;
    padding-top: 12px;
    color:  #2f3542;
    display: flex;
    flex-direction: column;
    font-family: 'Raleway';
    font-weight: 700;
   
}

.user-connection{
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    font-size: 12pt;
    color: #2f3542;
    
   
}

#user-connection-icon{
    font-size: 24pt;
    padding: 0 2px;
    color: #2ed573;
    cursor: pointer;
  
}

.user-conversations{

    width: 100%;
    height: 100%;
}

.conversations-header{
    width: 100%;
    height: 6vh;
    padding: 20px 30px;
    margin-bottom: 7px;
    font-family: 'Raleway';
    font-weight: 700;
    font-size: 14pt;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;


}

.conversation-notification-bckg{
    display: flex;
    align-items: center;
    justify-self: center;
    background-color: rgba(255, 255, 255, 0.856);
    margin-left: 17vh;  
    padding: 0px 24px;
    height: 8vh;

    

  
    
}
.conversation-notification{
    font-size: 8pt;
    color: #ffffff;
    background-color:  #5352ed;
    border-radius: 100%;
    width: 2vh;
    height: 2vh;
    padding: 2px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Raleway';
    font-weight: 700;
    
    
}

.conversations-main-list{
    margin-bottom: 10px;
    border-bottom:  solid 1.5px rgb(235, 235, 235);
    width: 100%;
    height: 100%;
}
.contact-info{
    display: flex;
    flex-direction: row;
    align-items: center;
    width: 100%;
    height: 100%;
    max-height: 10vh;
    padding: 12px 30px;
    border-top: solid 1.5px rgb(235, 235, 235);
    
   
  
}

.contact-info:hover{
    background-color:  rgb(235, 235, 235);
    cursor: pointer;

}
.contact-info:hover > .conversation-notification-bckg{
    background-color: rgb(235, 235, 235);
    cursor: pointer;

}

.contact-name{
    max-width: 10vh;
    width: 100%;
    white-space: nowrap;
    padding-left: 12px;
   
}


.contact-profile-pic{

    background-color:rgba(211, 211, 211, 0.336);
    width: 6vh;
    height: 6vh;
    border-radius: 100%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    
    

}

.contact-message{
    max-width: 10vh;
    width: 100%;
    white-space: nowrap;
    padding: 5px 0;
    padding-left: 12px;
    color:  #57606f;
    

}


#new-message{

    font-family: 'Raleway';
    font-weight: 600;

}
#contact-selected{
    font-family: 'Raleway';
    font-weight: 600;
    background-color: rgb(235, 235, 235);

 
}


#contact-selected > .conversation-notification-bckg{
    background-color: rgb(235, 235, 235);
    cursor: pointer;

}


.profile-nav::-webkit-scrollbar-track
{

	border-radius: 10px;
	background-color: transparent;
}
.profile-nav::-webkit-scrollbar
{
	width: 0px;
	background-color:transparent;
}

.profile-nav::-webkit-scrollbar-thumb
{
	border-radius: 10px;
	background-color: transparent;
}

.chat-main-wrapper{ 
    
    width: 100vh;
    height: 100%;
    border-left: solid 2px rgba(211, 211, 211, 0.336);

   
}

.chat-header{
    width: 100%;
    background-color:  #5352ed;
    height: 9vh;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
}

.chat-header-contact-profile-pic{
    width: 6vh;
    height: 6vh;
    background-color: rgba(211, 211, 211, 0.336);
    /* border:  solid 2px #ffffff; */
    border-radius: 100%;
    cursor: pointer;

}

.chat-header-contact-connection-display{
   
    font-family: 'Raleway';
    font-weight: 400;
    padding: 2px 0px;
    font-size: 11pt;
    cursor: pointer;
    
}

.chat-header-contact-name{
    font-family: 'Raleway';
    font-weight: 500;
    font-size: 13pt;
    padding-left: 15px;
    color: #ffffff;
}

.chat-conversation-wrapper{


    width: 100%;
    height: 80.7%;
    overflow-y: scroll;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    padding: 20px 30px;
    z-index: 0;
    scroll-behavior: smooth;
 
  
}


.chat-conversation-wrapper::-webkit-scrollbar-track
{
	-webkit-box-shadow: inset 0 0 2px rgba(0, 0, 0, 0.062);
	background-color: transparent;
}


.chat-conversation-wrapper::-webkit-scrollbar
{
	width: 7px;
	background-color: transparent;
}


.chat-conversation-wrapper::-webkit-scrollbar-thumb
{
    background-color:#a4b0bebd;
    border-radius: 6px;

}




.chat-user-message-wrapper{
    width: 100%;
    height: 9.3%;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    background-color:#f1f2f6;
    position: relative;
    
}


.chat-user-message-form-wrapper{
    background-color: #ffffff;
    width: 85%;
    padding: 10px 20px;
    border-radius: 22px;
}

#user-message-form{

    width: 100%;
    font-size: 13pt;
    padding: 2px 10px;
    outline-style: none;
    border: none;
    font-family: 'Raleway';
    font-weight: 500;
}

#user-message::placeholder{

    color:#747d8c;

}

#send-message, #attach-file,#emoji{

    color: #a4b0be;
    cursor: pointer;
}

#send-message{
    padding: 0px 15px;
}

#emoji{
    padding-left: 15px;
    padding-right: 8px;
}

#attach-file{
    padding-right: 10px;
}

#chat-contact-messages-options, #video-call{
    color: white;
    cursor: pointer;
    padding: 0px 5px;
   
}

.chat-header-contact-master{
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}

#attach-file-input{
    display:  none;
  
}

.attach-file-wrapper{
    display: flex;
    justify-content: center;
    align-items: center;
}

#attach-file:active{
    color: #2f3542;
}

.message-wrapper{
    display: flex;
    flex-direction: row;
    padding: 12px 0;
    align-items: right;
    justify-content: flex-end;
    max-width: 60vh;
    margin-left: 36vh;

  
  
}
.message-box-style {
    width: 0; 
    height: 0; 
    border-top: 0px solid transparent;
    border-bottom: 15px solid transparent;
    border-left: 15px solid #5352ed;
  

}
.message-box{
    background-color: #5352ed;
    padding: 20px 25px;
    text-align: left;
    max-width: 60vh;
    border-radius: 14px 0px 14px 14px;
 


   
}

.message-box-p{
    color: white;
    line-height: 23px;
    max-width: 60vh;
    height: 100%;  
}


/* Estilização das mensagens dos contatos */

.contact-message-wrapper{
    display: flex;
    flex-direction: row;
    padding: 12px 0;
    align-items: right;
    justify-content: flex-start;
    max-width: 60vh;
    margin-left: 0vh;
   
 
  
}
.contact-message-box-style {
    width: 0; 
    height: 0; 
    border-top: 0px solid transparent;
    border-bottom: 15px solid transparent;
    border-right: 15px solid #2f3542;

}
.contact-message-box{
    background-color: #2f3542;
    padding: 20px 25px;
    text-align: left;
    max-width: 60vh;
    border-radius: 0px 14px 14px 14px;

   
}

.contact-message-box-p{
    color: white;
    line-height: 23px;
    max-width: 60vh;
    height: 100%;  
}

.emojis-wrapper{
    
    width: 100%;
    padding: 15px 10px;
    background-color: #f1f2f6;
    position: absolute;
    z-index: 1;
    bottom: 8vh;
    display: inline-block;
    display: none;
 
}

.close-emoji-wrapper{
    
 
    width: 100%;
    padding: 15px 10px;
    background-color: #f1f2f6;
    position: absolute;
    z-index: 1;
    bottom: 8vh;
    display: inline-block;
    position: absolute;
    
    

}

.emoji-list{
    list-style: none;
    display: flex;
    flex-direction: row;
}

.emoji-item{
    font-size: 16pt;
    padding:0px 5px;
    cursor: pointer;
}

.select-profile-pic-wrapper{
    width: 100%;
    height: 100%;
    background-color:#2f3542ef;
    z-index: 2;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}

.select-profile-pic{

    animation: ease-in-out;
    transition: .2s;
    margin: 13vh auto;
    width: 1000px;
    height: 700px;
    background-color: #ffffff;
    padding: 20px 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
  
  
    
}

.select-profile-pic-title{
  
    display: flex;
    flex-direction: row;
    font-size: 16pt;
    color: #2f3542;
    font-family: 'Raleway';
    font-weight: 700;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 25px;
    text-transform: uppercase;
   
    

}
#close-select-profile-pic-menu{
    font-size: 22pt;
    color:#2f3542;
  
    cursor: pointer;
   
 

}
#select-pic{
    display: none;
}

#select-pic-btn{
    cursor: pointer;
    width: 100%;
    height: 100%;
    color: #ffffff;
    padding: 15px 25px;
    border: solid 2px #ffffff;
    text-align: center;
    font-family: 'Raleway';
    font-weight: 500;
    font-size: 12pt;
    
}




#cancel-selected-profile-pic{
    cursor: pointer;
    background-color: transparent ;
    border: solid 2px#a4b0be;
    color: #a4b0be;
    padding: 16px 50px;
    width: 200px;
    text-align: center;
    font-family: 'Raleway';
    font-size: 13pt;
    outline-style: none;
    font-weight: 500;
    margin: 0px 3px;
}

.select-profile-pic-img-display{
    width: 95%;
    border: solid 2px #2f3542;
    background-color: #2f3542;
    height: 570px;
    margin-top: 10px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  
}

.get-started{
  display: flex;
  flex-direction: column;
  margin: 20vh auto;
  width: 500px;
  padding: 30px;
  align-items: center;
  justify-content: center;
  background-color: white;
  
 
}
.get-started p{
  font-size: 30pt;
  font-weight: 700;
  display: flex;
  align-items: center;
  color: #2f3542;
   margin-top: 20px;
   margin-bottom: 30px;
  
}

.login-p-subtitle{
  color: #5352ed;
}

#login-logo{
    color: #5352ed;
    font-size: 30pt;

}



.login-form{
  margin: 8px 0;
  padding: 16px 12px;
  width: 350px;
  outline-style: none;
  border: none;
  font-family: 'Raleway';
  font-size: 12pt;
  font-weight: 500;
  border: none;
  border: solid 4px rgb(235, 235, 235);
 
}

.login-btn{
  width: 350px;
  outlyne-style: none;
  border: none;
  background-color: #5352ed;
  font-size: 'Raleway';
  font-weight: 700;
  color: white;
  font-size:18pt;
  padding: 16px 0px;
  margin-top: 20px;
  margin: 20px 0;
  cursor: pointer;
}

.login-form:focus{
  border: solid 4px black;
  transition: .2s;
}

.login-btn:active{
  outline-style: none;
  border: none;
}
              
            
!

JS

              
                var UserNameDisplay = document.getElementById('user-name')
var UserConnectStat = document.getElementById('user-connection-icon')
var UserProfileStatText = document.getElementById('user-profile-name')

var chatWrapper = document.getElementById('chat-wrapper')
var userTxt = document.getElementById('user-message-form')

var messageWrapper = document.createElement('div')
messageWrapper.className = 'message-wrapper'
var messageBox = document.createElement('div')
messageBox.className = 'message-box'
var messageBoxStyle = document.createElement('div')
messageBoxStyle.className = 'message-box-style'
var messageBoxP = document.createElement('p')
messageBoxP.className = 'message-box-p'

var emojiWrapper = document.getElementById('emojis-wrapper')
var emojiIcon = document.getElementById('emoji')

var emojiCode = 0

var selectProfilePicWrapper = document.getElementById('select-profile-pic-menu')


// Botão de display de conexão do usuário (Online/Offline)
function displayUserConnectStat(){
    if(UserConnectStat.innerText == 'toggle_on'){

        UserConnectStat.style.transition = '.2s'
        UserConnectStat.style.color = '#2f3542c5'
        UserConnectStat.innerText = 'toggle_off'
        UserProfileStatText.innerHTML = 'Offline'

    } else if(UserConnectStat.innerText == 'toggle_off'){

        UserConnectStat.style.transition = '.2s'
        UserConnectStat.style.color = '#2ed573'
        UserConnectStat.innerText = 'toggle_on'
        UserProfileStatText.innerHTML = 'Online'
        

    }
}


// Pega a mensagem digitada pelo usuário no formulário, cria uma estilização para ela e a exibe no chat

function sendMessage(){

    if (userTxt.value == ''){

        

    }else{
        
       
        let messageWrapperClone = messageWrapper.cloneNode(true)
        let messageBoxClone = messageBox.cloneNode(true)
        let messageBoxStyleClone = messageBoxStyle.cloneNode(true)
        let messageBoxPClone = messageBoxP.cloneNode(true)

        messageWrapperClone.appendChild(messageBoxClone)
        messageBoxClone.appendChild(messageBoxPClone)
        messageWrapperClone.appendChild(messageBoxStyleClone)
        chatWrapper.appendChild(messageWrapperClone)
        messageBoxPClone.innerHTML = userTxt.value

        if (userTxt.value == 'saber mais'){

            
            contactMessage(contactHelp = 'Para enviar as mensagens, além de utilizar o botão Enviar ao lado direito do formulário, você pode enviar ao pressionar a tecla Enter &#x1F609;&#x1F609;')
            contactMessage(contactHelp = 'Vale ressaltar que mensagens com conteúdo vazio não são enviadas! &#x1F605;')
            contactMessage(contactHelp = 'Além disso, você pode interagir com alguns elementos da barra de navegação da esquerda &#x1F604;&#x1F604;. Tente clicar nos elementos para conferir as alterações, como mudar sua foto de perfil ou seu status de conexão')
            
        }
        

        emojiWrapper.className = 'emojis-wrapper'
        emojiIcon.style.color = '#a4b0be' 
        userTxt.value = ''
        userTxt.focus()
        messageWrapperClone.scrollIntoView();
   
        
       
     
    
    
    }

}

// Mostra os diálogos do sistema com o usuário dependendo do que for escrito 

var contactMessageWrapper = document.createElement('div')
contactMessageWrapper.className = 'contact-message-wrapper'
var contactMessageBox = document.createElement('div')
contactMessageBox.className = 'contact-message-box'
var contactMessageBoxStyle = document.createElement('div')
contactMessageBoxStyle.className = 'contact-message-box-style'
var contactMessageBoxP = document.createElement('p')
contactMessageBoxP.className = 'contact-message-box-p'


function contactMessage(contactHelp){

        let contactMessageWrapperClone = contactMessageWrapper.cloneNode(true)
        let contactMessageBoxClone = contactMessageBox.cloneNode(true)
        let contactMessageBoxStyleClone = contactMessageBoxStyle.cloneNode(true)
        let contactMessageBoxPClone = contactMessageBoxP.cloneNode(true)

        contactMessageWrapperClone.appendChild(contactMessageBoxStyleClone)
        contactMessageWrapperClone.appendChild(contactMessageBoxClone)
        contactMessageBoxClone.appendChild(contactMessageBoxPClone)

        contactMessageBoxPClone.innerHTML = contactHelp
        chatWrapper.appendChild(contactMessageWrapperClone)
        contactMessageWrapperClone.scrollIntoView();



    
}


// Abre a janela de emojis

function emojiWindow(){

  if (emojiWrapper.className == 'emojis-wrapper'){

    emojiIcon.style.color = '#747d8c' 
    emojiWrapper.className = 'close-emoji-wrapper'
  } else if (emojiWrapper.className == 'close-emoji-wrapper'){
    emojiIcon.style.color = '#a4b0be' 
    emojiWrapper.className = 'emojis-wrapper'
  }
    
}

// Seleciona o emoji e o coloca no formulário de mensagem do usuário

function insertEmoji(x){
    
    if(emojiCode == 1){
        userTxt.value+= '\u{1F600}'
    }
    if(emojiCode == 2){
        userTxt.value+= '\u{1F604}'
    }
    if(emojiCode == 3){
        userTxt.value+= '\u{1F605}'
    }
    if(emojiCode == 4){
        userTxt.value+= '\u{1F602}'
    }
    if(emojiCode == 5){
        userTxt.value+= '\u{1F609}'
    }
    if(emojiCode == 6){
        userTxt.value+= '\u{1F618}'
    }
    if(emojiCode == 7){
        userTxt.value+= '\u{1F620}'
    }
    if(emojiCode == 8){
        userTxt.value+= '\u{1F49B}'
    }
    if(emojiCode == 9){
        userTxt.value+= '\u{1F44D}'
    }
    if(emojiCode == 10){
        userTxt.value+= '\u{1F44E}'
    }

}

function changeProfilePic(){


}


// Permite enviar a mensagem contida no formulário do usuário usando a tecla enter 

document.getElementById('user-message-form').addEventListener('keydown', function(event){


    var tecla = event.keyCode
    
    if(tecla == 13){
        sendMessage()
    }
})

function changeProfilePic(){

    selectProfilePicWrapper.style.display = 'block'
    contactMessage(contactHelp = 'Infelizmente, essa aplicação não tem conexão com banco de dados, portanto não é possível fazer upload da sua imagem de perfil &#x1F44E;')
     

}

document.body.addEventListener('keydown', function(event){


    var tecla = event.keyCode
    
    if(tecla == 27){
        closeSelectProfilePicMenu()
        
    }
})

function closeSelectProfilePicMenu(){

    selectProfilePicWrapper.style.display = 'none'

   
}

function attachFile(){




}

//Efetua o "login"

var loginScreen = document.getElementById('login-screen')
var mainWrapper = document.getElementById('main')
function login(){
  
  loginScreen.style.display = 'none'
  mainWrapper.style.display = 'flex'
  
}
              
            
!
999px

Console