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JavaScript AJAX Basics Programming AJAX Check for the correct ready state

Posted by Marquis Briggs
Marquis Briggs
8,967 Points

Add a conditional statement inside the onreadystatechange event handler that tests to make sure the server has sent back

What is a parse error and what am I doing wrong ? No matter what I type in that is the error message that I get.

app.js 
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState === 4) {&& (xhr.status === 200) {{
};
};
xhr.open('GET', 'sidebar.html');
xhr.send();
index.html 
<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>AJAX with JavaScript</title>
  <script src="app.js"></script>
</head>
<body>
  <div id="main">
    <h1>AJAX!</h1>
  </div>
  <div id="sidebar"></div>
</body>
</html>

2 Answers

Reggie Williams
STAFF
Reggie Williams
Treehouse Teacher
Reggie Williams
Reggie Williams
Treehouse Teacher

Hey Marquis Briggs it looks like there are a few extra {{ around. Make sure both of the conditions in the if statement are inside one set of parenthesis like this if(condition1 && condition2)

Uma Maheswari Ramasamy
Uma Maheswari Ramasamy
5,733 Points
Uma Maheswari Ramasamy
Uma Maheswari Ramasamy
5,733 Points

Hey, both the condition should be inside the paranthesis if (xhr.readyState === 4 && xhr.status === 200) { }