Vim Overlength highlighting for certain filetypes only

Question

I'm using the following in my .vimrc to highlight lines that over 80 characters long:

highlight OverLength ctermbg=red ctermfg=white guibg=#592929
match OverLength /\%81v.\+/

This affects all of my files. Is there a way I can set this to only affect a certain filetype, such as a Javascript file?

Answer 1

You can save those lines to a file named ~/.vim/after/ftplugin/javascript.vim on Unix or ~\vimfiles\after\ftplugin\javascript.vim on Windows.

Answer 2

Use au Filetype ... source ... to source a file containing the commands for the appropriate file types.