如何让用户能够像堆栈溢出一样引入块引号?

How to make user able to introduce block quotes like stack overflow?

如何让用户像堆栈溢出一样自己引入块引号或粗体文本?以及堆栈溢出如何将块引号更改为“>”?

您必须使用 Markdown to HTML converter. Probably the best for you would be a Javascript converter. Look at this link for the Showdown Converter