AEM技术问题：HTML视图渲染textarea时无滚动条，如何设置显示？

Got it, let's tackle this scrollbar issue for your AEM textarea! You already checked the Allow Multiple Lines option in the Object Palette, which is the first key step, but we need a few more tweaks to get those scrollbars showing up. Here are actionable approaches you can try:

The most straightforward fix is to define a fixed height and overflow behavior via CSS. Drop this into your component's stylesheet (or the global CSS if applicable):

/* Replace with your actual textarea selector */
.your-component-textarea {
  height: 160px; /* Set a fixed height that fits your layout */
  overflow-y: auto; /* Shows vertical scrollbar only when content overflows */
  resize: vertical; /* Optional: lets users adjust the textarea height manually */
}

Make sure the selector targets your specific textarea element—you can use browser dev tools (F12) to inspect and grab the correct class or ID.

If you're using a Touch UI dialog, add the rows attribute to your textarea's XML configuration to set an initial visible line count. When content exceeds this number, scrollbars will appear automatically:

<textarea
    jcr:primaryType="nt:unstructured"
    sling:resourceType="granite/ui/components/coral/foundation/form/textarea"
    fieldLabel="Your Text Field"
    name="./yourTextContent"
    rows="6" <!-- Adjust this number to control initial height -->
/>

For Classic UI dialogs, the setup is similar in your component's dialog.xml:

<textarea
    jcr:primaryType="cq:Widget"
    xtype="textarea"
    fieldLabel="Your Text Field"
    name="./yourTextContent"
    rows="6"
/>

Sometimes global CSS or parent container styles might be overriding the textarea's default overflow behavior. Use browser dev tools to inspect the textarea and check if overflow-y is set to visible or hidden (which would suppress scrollbars). If so, either adjust the conflicting style rule or use a more specific CSS selector to force overflow-y: auto.

内容的提问来源于stack exchange，提问作者ACE_07