How to check if a div does not exist with JavaScript?

To check if a div does not exist with JavaScript, you can use the document.getElementById() function or other DOM traversal methods and then check if the returned value is null.

Here’s an example using getElementById():

var divElement = document.getElementById('your_div_id');

if (divElement === null) {
    console.log('The div does not exist.');
} else {
    console.log('The div exists.');
}

If the div with the specified ID does not exist in the document, getElementById() will return null.

You can then check if the returned value is null to determine if the div does not exist.

Alternatively, if you’re checking for a div without a specific ID, you can use other methods like querySelector() or querySelectorAll():

var divElements = document.querySelectorAll('div');

if (divElements.length === 0) {
    console.log('No divs exist.');
} else {
    console.log('At least one div exists.');
}

This will check if there are any div elements in the document. If the length property of the returned NodeList is 0, it means there are no divs in the document.