Question

[Solved] Uncaught Typeerror: cannot read property ‘innerHTML’ of null

Can anyone explain what is theses errors?

Uncaught TypeError: cannot read property ‘innerHTML’ of null

View on my website
This is the line which is causing the error:

var idPost=document.getElementById("status").innerHTML;

Thanks

Solution #1:

var idPost=document.getElementById("status").innerHTML;

The ‘status’ element does not exist in your webpage.

So document.getElementById(“status”) return null. While you can not use innerHTML property of NULL.

You should add a condition like this:

if(document.getElementById("status") != null){
    var idPost=document.getElementById("status").innerHTML;
}

Hope this answer can help you. 🙂

Respondent: jianbo.zheng

Solution #2:

Update:

The question doesn’t ask for jquery. So lets do it without jquery:

document.addEventListener("DOMContentLoaded", function(event) { 
    //Do work
});

Note this method will not work on IE8.

Old Answer:

You are calling this script before DOM is ready. If you write this code into jquery’s $(function() method it will work.

Respondent: egiray

Solution #3:

I had a similar problem, but I had the existing id, and as egiray said, I was calling DOM before it loaded and Javascript console was showing the same error, so I tried:

window.onload = (function(){myfuncname()});

and it starts working.

Respondent: Kel_Ebek

Solution #4:

While you should ideally highlight the code which is causing an error and post that within your question, the error is because you are trying to get the inner HTML of the ‘status’ element:

var idPost=document.getElementById("status").innerHTML;

However the ‘status’ element does not exist within your HTML – either add the necessary element or change the ID you are trying to locate to point to a valid element.

Respondent: James Shuttler

Solution #5:

run the code after your html structure in the body statement

    <html>
    <body>
    <p>asdasd</p>
    <p>asdasd</p>
    <p>asdasd</p>
    <script src="myfile.js"></script>
    </body>
    </html>
Respondent: agalal designs

Solution #6:

If the script is in the head of your HTML document, the body of your HTML document has not yet been created by the browser, regardless of what will eventually be there (the same result occurs if your script is in the HTML file but above the element). When your variable tries to find document.getElementById(“status”) it does not yet exist, and so it returns a value of null. When you then use the variable later in your code, the initial value (null) is used and not the current one, because nothing has updated the variable.

I didn’t want to move my script link out of the HTML head, so instead I did this in my JS file:

var idPost //define a global variable
function updateVariables(){
    idPost = document.getElementById("status").innerHTML; //update the global variable
}

And this in the HTML file:

<body onload="updateVariables()">

If you already have an onload function in place, you can just add the additional line to it or call the function.

If you don’t want the variable to be global, define it locally in the function that you are trying to run and make sure the function is not called before the page has fully loaded.

Respondent: Catherine Gracey

Solution #7:

//Run with this HTML structure
<!DOCTYPE html>
<head>
    <title>OOJS</title>

</head>
<body>
    <div id="status">
    </div>
    <script type="text/javascript" src="scriptfile.js"></script>
</body>
</html>
Respondent: Swaraj Ghosh

Solution #8:

Looks like the script executes before the DOM loads.
Try loading the script asynchronously.

 <script src="yourcode.js" async></script>
Respondent: José Rasmussen

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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