Operator first support,including ternary,dot etc.

generally this will give us fairly accurate indents without having
specific code for each operator.Thanks to
pangloss#139 (comment)
which this is based on Update javascript.vim

Author: bounceme

Diff for: indent/javascript.vim

@@ -69,9 +69,11 @@ let s:msl_regex = s:continuation_regex.'\|'.s:expr_case
 let s:one_line_scope_regex = '\%(\%(\<else\>\|\<\%(if\|for\|while\)\>\s*(.*)\)\|=>\)' . s:line_term
 
 " Regex that defines blocks.
-let s:block_regex = '\%([{[]\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term
+let s:block_regex = '\%([{([]\)\s*\%(|\%([*@]\=\h\w*,\=\s*\)\%(,\s*[*@]\=\h\w*\)*|\)\=' . s:line_term
 
-let s:var_stmt = '^\s*(const\|let\|var)'
+let s:operator_first = '^\s*\%([-*/+.:?]\|||\|&&\)'
+
+let s:var_stmt = '^\s*\%(const\|let\|var\)'
 
 let s:comma_first = '^\s*,'
 let s:comma_last = ',\s*$'
@@ -240,7 +242,7 @@ function s:LineHasOpeningBrackets(lnum)
     endif
     let pos = match(line, '[][(){}]', pos + 1)
   endwhile
-  return (open_0 > 0) . (open_2 > 0) . (open_4 > 0)
+  return (open_0 > 0 ? 1 : (open_0 == 0 ? 0 : 2)) . (open_2 > 0) . (open_4 > 0)
 endfunction
 
 function s:Match(lnum, regex)
@@ -378,13 +380,33 @@ function GetJavascriptIndent()
     return indent(prevline) + s:case_indent_after
   endif
 
-  if (line =~ s:ternary)
-    if (getline(prevline) =~ s:ternary_q)
+
+  " If line starts with operator...
+
+  if (s:Match(v:lnum, s:operator_first))
+    if (s:Match(prevline, s:operator_first))
+      " and so does previous line, don't indent
       return indent(prevline)
-    else
+    end
+    let counts = s:LineHasOpeningBrackets(prevline)
+    if counts[0] == '2'
+      call cursor(prevline, 1)
+      " Search for the opening tag
+      let mnum = searchpair('(', '', ')', 'bW', s:skip_expr)
+      if mnum > 0 && s:Match(mnum, s:operator_first)
+        return indent(mnum)
+      end
+    elseif counts[0] != '1' && counts[1] != '1' && counts[2] != '1'
+      " otherwise, indent 1 level
       return indent(prevline) + s:sw()
-    endif
-  endif
+    end
+    " If previous line starts with a operator...
+  elseif s:Match(prevline, s:operator_first) && !s:Match(prevline, s:comma_last)
+    let countscur = s:LineHasOpeningBrackets(v:lnum)
+    if countscur[0] != '2'
+      return indent(prevline) - s:sw()
+    end
+  end
 
   " If we are in a multi-line comment, cindent does the right thing.
   if s:IsInMultilineComment(v:lnum, 1) && !s:IsLineComment(v:lnum, 1)
@@ -448,7 +470,19 @@ function GetJavascriptIndent()
     else
       call cursor(v:lnum, vcol)
     end
-  endif
+  elseif line =~ ')' || line =~ s:comma_last
+    let counts = s:LineHasOpeningBrackets(lnum)
+    if counts[0] == '2'
+      call cursor(lnum, 1)
+      " Search for the opening tag
+      let mnum = searchpair('(', '', ')', 'bW', s:skip_expr)
+      if mnum > 0
+        return indent(s:GetMSL(mnum, 0)) 
+      end
+    elseif  line !~ s:var_stmt
+      return indent(prevline)
+    end
+  end
 
   " 3.4. Work on the MSL line. {{{2
   " --------------------------