テキストを大文字・小文字に変換

［text-transform: none を指定］
This property controls capitalization effects of an element's text. Values have the following meanings:

［text-transform: capitalize を指定］
This property controls capitalization effects of an element's text. Values have the following meanings:

［text-transform: uppercase を指定］
This property controls capitalization effects of an element's text. Values have the following meanings:

［text-transform: lowercase を指定］
This property controls capitalization effects of an element's text. Values have the following meanings: