能不能加入清屏功能啊？[Can you add a clear screen feature?]

一个问题的代码量多了之后，页面都卡卡的，再输入问题文本框都卡的不行，输不上去。

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When the code for a question gets too long, the page starts getting really sluggish and laggy. It becomes a pain to even type in the text box - it freezes up and you can't enter anything.