There are a few ways to stop a text-area from resizing in Safari. Here are a few methods:

Using CSS

The simplest way to disable the resizing handles is to use CSS. You can add the following CSS rule to your HTML document:

CSS

textarea {
  resize: none;
}

This will prevent the user from resizing the textarea, and will also hide the resizing handles.

Using JavaScript

You can also disable the resizing handles using JavaScript. The following JavaScript code will disable the resizing handles for all textarea elements:

JavaScript

document.querySelectorAll('textarea').forEach(function(textarea) {
  textarea.style.resize = 'none';
});

Using the Safari Developer Tools

You can also disable the resizing handles using the Safari Developer Tools. To do this, open the Developer Tools, and then select the "Elements" tab. Find the textarea element that you want to disable the resizing handles for, and then right-click on it. Select the "Inspect" option from the menu that appears.

In the Inspector window, expand the "Style" section. In the "Properties" pane, find the "resize" property. Set the value of the "resize" property to "none".

This will disable the resizing handles for the selected textarea element.

Using a Safari extension

There are also a number of Safari extensions that can be used to disable the resizing handles. One such extension is called "Text Area Resizing Disabler". This extension can be found in the Safari App Store.

To install the extension, simply click on the "Add" button. Once the extension is installed, you will need to enable it. To do this, click on the Safari menu bar, and then select "Preferences". Click on the "Extensions" tab, and then find the "Text Area Resizing Disabler" extension. Check the box next to the extension to enable it.

Once the extension is enabled, the resizing handles will be disabled for all textarea elements in Safari.