For the purpose of this exercise, assume that you can't find out by reading the source code the type of component used as the text area in the HTML editor.
出于本练习的需要，假定您不能通过阅读源码查明在HTML编辑器中用作文本区域的组件的类型。
For the purpose of this exercise, assume that you can't find out by reading the source code the type of component used as the text area in the HTML editor.
出于本练习的需要，假定您不能通过阅读源码查明在HTML编辑器中用作文本区域的组件的类型。
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