A few JSHint/Syntastic questions for Vim - vim

Question

I'm using Vim with Syntastic and JSHint, and there are a few bits of glitchy behavior that I'd like to fix.
Whenever I modify the last character on a line of text and save (:w), I momentarily see "^M" flash after the text before (sometimes) vanishing. Sometimes it sticks around and I have to manually delete it. What's the deal with this and how do I prevent it?
When there is an error in the quickfix view, how do I toggle focus between the quickfix view and the Vim editor window?
Vim crashes maybe once per minute, and I haven't the slightest clue as to why, but it's extremely annoying. The error typically reads "Vim: Caught deadly signal ABRT Vim: Finished. [1]6099 abort vi gulpfile.js" How do I prevent this?
Here is my .vimrc file:
set nocompatible " be iMproved, required
filetype off " required
" set the runtime path to include Vundle and initialize
set rtp+=~/.vim/bundle/Vundle.vim
call vundle#begin()
" alternatively, pass a path where Vundle should install plugins
"call vundle#begin('~/some/path/here')
" let Vundle manage Vundle, required
Plugin 'VundleVim/Vundle.vim'
" The following are examples of different formats supported.
" Keep Plugin commands between vundle#begin/end.
" plugin on GitHub repo
Plugin 'tpope/vim-fugitive'
" plugin from http://vim-scripts.org/vim/scripts.html
"Plugin 'L9'
" Git plugin not hosted on GitHub
Plugin 'git://git.wincent.com/command-t.git'
" git repos on your local machine (i.e. when working on your own plugin)
"Plugin 'file:///home/gmarik/path/to/plugin'
" The sparkup vim script is in a subdirectory of this repo called vim.
" Pass the path to set the runtimepath properly.
Plugin 'rstacruz/sparkup', {'rtp': 'vim/'}
" Avoid a name conflict with L9
"Plugin 'user/L9', {'name': 'newL9'}
" All of your Plugins must be added before the following line
call vundle#end() " required
filetype plugin indent on " required
" To ignore plugin indent changes, instead use:
"filetype plugin on
"
" Brief help
" :PluginList - lists configured plugins
" :PluginInstall - installs plugins; append `!` to update or just :PluginUpdate
" :PluginSearch foo - searches for foo; append `!` to refresh local cache
" :PluginClean - confirms removal of unused plugins; append `!` to auto-approve removal
"
" see :h vundle for more details or wiki for FAQ
" Put your non-Plugin stuff after this line
" React.js/JSX syntax highlighting
"Plugin 'mxw/vim-jsx'
"
"JSHint
Plugin 'wookiehangover/jshint.vim'
"Syntastic
Plugin 'scrooloose/syntastic'
"Syntastic configuration
set statusline+=%#warningmsg#
set statusline+=%{SyntasticStatuslineFlag()}
set statusline+=%*
let g:syntastic_always_populate_loc_list = 1
let g:syntastic_auto_loc_list = 1
let g:syntastic_check_on_open = 1
let g:syntastic_check_on_wq = 0
let g:syntastic_html_tidy_exec = 'tidy5'
let g:syntastic_javascript_checkers = ['jshint']
let g:JSHintHighlightErrorLine = 0
syntax on
set t_Co=256
set ai
set shiftwidth=4
set tabstop=4
set number
"colorscheme monokai
colorscheme skittles_berry
Thanks for any help you can provide.

Answer 1

I have no idea where your ^M issue and your crashing issue come from but you don't need such a huge plugin for such a simple task.
Create ~/.vim/after/ftplugin/javascript.vim if it doesn't exist and paste the lines below:
errorformat for jshint
setlocal errorformat=%f:\ line\ %l\\,\ col\ %c\\,\ %m,%-G%.%#
tell Vim to use jshint for the :make command
setlocal makeprg=jshint
add an autocommand to run :make on the current file upon write, the | silent wincmd p at the end switches the focus back to the editing window once the quickfix window is opened
autocmd! BufWritePost <buffer> silent make % | silent redraw! | silent wincmd p
I've never experienced a single crash with that simple setup, or that ^M issue.
With that in place you should get something like that after :w:
To move the focus from/to the quickfix window, use <C-w>p.
To jump to the previous/next error without using the quickfix window, use :cprevious/:cnext.
Reference:
:help 'errorformat'
:help 'makeprg'
:help autocmd
:help bufwritepost
:help :silent
:help :redraw
:help :wincmd
:help quickfix
Also, check out this great post: The Power of Vim