Check if the caption length exceeds 200 characters and add a scroll if needed

// Check if the caption length exceeds 200 characters and add a scroll if needed

        if (imageFileCaption.length > 200) {
            $('#imageMessageCaption').addClass('scrollable-file-caption');
        } else {
            $('#imageMessageCaption').removeClass('scrollable-file-caption');
        }

Explanation

1. CSS: The .scrollable-caption class limits the maximum height of the element and adds a vertical scroll if the content overflows.
2. JavaScript: The code checks if the length of the caption exceeds 200 characters. If it does, it adds the .scrollable-caption class to #imageMessageCaption. If the caption is 200 characters or fewer, it ensures the class is removed to avoid unnecessary scrolling.

This approach ensures that only long captions get a vertical scroll, while shorter captions are displayed normally. Adjust the max-height in the CSS according to your design requirements.