When a jquery confirm dialog is displayed, the scroll bar mysteriously fades away

Whenever a jQuery confirm dialog is displayed, the scroll bar on the page disappears, causing the page to suddenly shift to the right. Here is the JavaScript code for the dialogue:

<script src="vendor/jquery-confirm.min.js"></script>
<link href="vendor/jquery-confirm.min.css" rel="stylesheet" type="text/css">
<script>
    function confirmDialog(content, func, parameter) {
        $.confirm({
            title: "",
            content: content,
            confirmButton: "Yes",
            cancelButton: "No",
            theme: "black",
            confirm: function() { func(parameter); },
            cancel: function() { }
        });
    }
</script>

I have applied this CSS style:

body {
    overflow-y: scroll;
}

How can I prevent this unwanted behavior from occurring?

Update

I attempted to use "!important", but when I inspected the page in Firefox, I noticed that this CSS rule was overriding it:

body.jconfirm-noscroll {
    overflow: hidden !important;
}

Additionally, there is a strikethrough on the following line of CSS:

overflow-y: scroll !important;

Answer №1

CSS can be likened to mathematics, where each selector is assigned a specificity number. In the case of equal numbers, the last one mentioned takes precedence. However, if the numbers are not equal, the highest specificity wins regardless of the order in which they appear.

Although tools like specificity calculator exist to help link selectors to specific numbers, it's not always necessary to use them.

In general, the hierarchy for CSS importance is as follows:

!important > style="inline rules" > #id > .class > attribute = element

If you need to override a particular selector, you may encounter situations like:

body.jconfirm-noscroll {
   some rule !important;
}

This translates to

!important + 1 x class + 1 x element
. To override this, your selector must be placed lower on the page (parsed later by the browser).

Alternatively, you could try overriding with:

html body.jconfirm-noscroll {
  some rule !important;
}

Remember, there are cases when even if you believe your selector is stronger, it may still not apply. This could be due to syntax errors in previous rules, stronger competing selectors, or issues with broken markup.

Answer №2

Dealing with CSS overrides can sometimes be a challenge...

One approach you could take is:

body, body.jconfirm-noscroll {
    overflow: auto!important;
}

However, this solution may not always be effective...

If the above doesn't work, consider adding a custom class to your body tag like

<body class="scroll-please">
and implementing the following CSS:

body.scroll-please, body.scroll-please.jconfirm-noscroll {
    overflow: auto!important;
}

I'm uncertain if this alternative will resolve the issue, so please give it a try and share the results with me! I'm curious to know.

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