Ensuring that the contents hidden by overflow:hidden remain truly concealed

When applying overflow: hidden; to a div, I have encountered situations where keyboard actions can still cause the div to scroll, even without visible scrollbars. This makes it difficult to return the div to its original state. Are there any additional steps I should take to prevent this issue?

For instance, in the provided fiddle, if you click on the letter L and then press the down arrow key while holding shift (expanding the selection), the undesired scrolling behavior occurs.

Check out the example here: http://jsfiddle.net/PeeHaa/H34mM/

Another scenario is when a textarea is present inside the div: http://jsfiddle.net/h6Bhb/1/

htmlcss

Answer №1

To prevent the selection of text within a specific element, a straightforward approach is to disable text-select functionality. This will effectively block the use of arrow keys for text selection.

In order to achieve this, you can utilize event.preventDefault() within the mousedown event handler using JavaScript.

If you are working with modern, standards-compliant browsers, your code snippet could look something like the following:

// assign an id to the div
document.getElementById('div').addEventListener('mousedown', function(e) {
    e.preventDefault();
}, false);​

Edit

Alternatively, as @JimThomas suggested in the comments, you can also disable text selection via CSS. However, it's worth noting that the CSS solution may not be as widely supported as the JavaScript method. How to disable text selection highlighting using CSS?

At present, there may not be a more elegant or comprehensive solution available (bearing in mind potential issues with input elements). It's uncertain whether such a solution exists...

Answer №2

Include the following CSS in your div:

-moz-user-select: -moz-none;
-khtml-user-select: none;
-webkit-user-select: none;
-ms-user-select: none; /* IE10+ */
user-select: none;

This method may not be effective in Internet Explorer versions older than 10 or with textareas, unless you disable the textarea itself to prevent selection.

Alternatively, consider using a JavaScript solution.

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