Prompt input box does not auto-expand while typing long prompts

[Ramahadam]

System Info / 系統信息

Operating System: macOS (Chrome browser)

Browser: Google Chrome (latest stable version)

GLM Web Chat

No GPU/CUDA/Python environment involved, as this issue occurs in the web interface.

Who can help? / 谁可以帮助到您？

No response

Information / 问题信息

• The official example scripts / 官方的示例脚本
• My own modified scripts / 我自己修改的脚本和任务

Reproduction / 复现过程

Steps to reproduce the behavior:

1. Open a new conversation in the GLM web interface.
2. Type or paste a long, multi-line prompt.
3. Continue typing until the content exceeds the height of the input box.
4. Notice that the input field remains a fixed height and becomes scrollable instead of expanding.

Current behavior:

• The prompt input has a fixed height.
• Users must scroll inside the text box to review or edit long prompts.
• Editing long prompts becomes inconvenient because only a small portion of the prompt is visible at any time.

This issue is reproducible every time.

Expected behavior / 期待表现

The prompt input box should automatically expand vertically as the user types, similar to modern chat interfaces.

Suggested behavior:

• Increase the height of the input field as additional lines are entered.
• Shrink back when content is removed.
• Only enable scrolling after reaching a reasonable maximum height.

This provides a much better writing and editing experience for long prompts and eliminates the need to constantly scroll inside the input field.

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I have forwarded it to the colleagues working on the z.ai website.