Attempting to conceal an element using a class in JavaScript, however, encountering a "unable to establish property 'class' of undefined" error

Whenever I click a button on my wordpress page, it triggers a function called "hideConstruction()" to hide all elements with the class ".construction". However, instead of achieving the intended result, I'm faced with the error message:

"Cannot set property 'visibility' of undefined"

Below is the code snippet that I embedded in my wordpress's script.js file, which is enqueued through functions.php:

function hideConstruction() {
    var elements = document.getElementsByClassName("construction");
    for (var i = 0; i < elements.length; i++) {
        elements[i].style.visibility = "hidden";
    }
}

If you'd like to see where this issue is occurring, check out this page:

Any insights into what I might be overlooking would be greatly appreciated. Thank you!

Answer №1

Executing the following code in the console will return two elements:

document.getElementsByClassName("construction")
. If you wish to hide the first element, you can do so using the following code:

document.getElementsByClassName("construction")[0].style.visibility = "hidden";

For hiding the second element, you can use:

document.getElementsByClassName("construction")[1].style.visibility = "hidden";

Answer №2

document.getElementsByClassName retrieves a collection of elements found in the HTML document.

For proper implementation, follow this example:

function hideConstruction() {
    var element = document.getElementsByClassName("construction")[0].style.visibility = "hidden";
}

Appreciate your cooperation!

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