Html

Chat

<label for="msg"><b>Message</b></label>
<textarea placeholder="Type message.." name="msg" required></textarea>

<button type="submit" class="btn">Send</button>
<button type="button" class="btn cancel" onclick="closeForm()">Close</button>

Css {box-sizing: border-box;}

/* Button used to open the chat form - fixed at the bottom of the page */
.open-button {
background-color: #555;
color: white;
padding: 16px 20px;
border: none;
cursor: pointer;
opacity: 0.8;
position: fixed;
bottom: 23px;
right: 28px;
width: 280px;
}

/* The popup chat - hidden by default */
.form-popup {
display: none;
position: fixed;
bottom: 0;
right: 15px;
border: 3px solid #f1f1f1;
z-index: 9;
}

/* Add styles to the form container */
.form-container {
max-width: 300px;
padding: 10px;
background-color: white;
}

/* Full-width textarea */
.form-container textarea {
width: 100%;
padding: 15px;
margin: 5px 0 22px 0;
border: none;
background: #f1f1f1;
resize: none;
min-height: 200px;
}

/* When the textarea gets focus, do something */
.form-container textarea:focus {
background-color: #ddd;
outline: none;
}

/* Set a style for the submit/login button */
.form-container .btn {
background-color: #04AA6D;
color: white;
padding: 16px 20px;
border: none;
cursor: pointer;
width: 100%;
margin-bottom:10px;
opacity: 0.8;
}

/* Add a red background color to the cancel button */
.form-container .cancel {
background-color: red;
}

/* Add some hover effects to buttons */
.form-container .btn:hover, .open-button:hover {
opacity: 1;
}
JavaScript
function openForm() {
document.getElementById("myForm").style.display = "block";
}

function closeForm() {
document.getElementById("myForm").style.display = "none";
}