Https://www.freecodecamp.org/learn/data-visualization/json-apis-and-ajax/post-data-with-the-javascript-xmlhttprequest-method

[mohamedmehdigara]

Tell us what’s happening:
I can’t find all correct answers. Help.

Your code so far

<script>
document.addEventListener('DOMContentLoaded',function(){
document.getElementById('sendMessage').onclick=function(){

  var userName=document.getElementById('name').value;
  // Add your code below this line
const xhr = new XMLHttpRequest();
xhr.open('POST',url,true);
xhr.setRequestHeader('Content-type', 'application/json;charset=UTF-8'

)
xhr.onreadystatechange = () => {
if(xhr.readyState === 4 && xhr.status == 201){
let serverResponse = JSON.parse(xhr.response)
document.getElementsByClassName('message')[0].textContent = serverResponse.userName + serverResponse.suffix
}
}
let body = JSON.stringify({userName: userName,suffix: 'Loves Cat'});
xhr.send();
  // Add your code above this line
};
});
</script>
<style>
body {
text-align: center;
font-family: "Helvetica", sans-serif;
}
h1 {
font-size: 2em;
font-weight: bold;
}
.box {
border-radius: 5px;
background-color: #eee;
padding: 20px 5px;
}
button {
color: white;
background-color: #4791d0;
border-radius: 5px;
border: 1px solid #4791d0;
padding: 5px 10px 8px 10px;
}
button:hover {
background-color: #0F5897;
border: 1px solid #0F5897;
}
</style>
<h1>Cat Friends</h1> 
<p class="message box">
Reply from Server will be here
</p>
<p>
<label for="name">Your name:
<input type="text" id="name"/>
</label>
<button id="sendMessage">
Send Message
</button>
</p>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36.

Challenge: Post Data with the JavaScript XMLHttpRequest Method

Link to the challenge:

freeCodeCamp.org