Autoload
```vim
augroup htmljs
  autocmd!
  autocmd FileType html :source ~/.vim/htmljs.vim
  autocmd FileType javascript :source ~/.vim/htmljs.vim
augroup END
```
```vim
iabbrev <buffer> ce document.createElement
iabbrev <buffer> cdv document.createElement("div")
iabbrev <buffer> csp document.createElement("span")
iabbrev <buffer> ae addEventListener
iabbrev <buffer> aec addEventListener("click",
iabbrev <buffer> ael addEventListener("load",
iabbrev <buffer> aek addEventListener("keydown",
iabbrev <buffer> dbod document.body
iabbrev <buffer> cla classList.add
iabbrev <buffer> clr classList.remove
iabbrev <buffer> dbod document.body
iabbrev <buffer> -> <space>=<space>()<space>=\><space>
```