Fixes module syntax for common js

Author: goatslacker

syntax/javascript.vim

@@ -35,13 +35,13 @@ syntax keyword jsOperator       delete instanceof typeof void new in
 syntax match   jsOperator       /\(!\||\|&\|+\|-\|<\|>\|=\|%\|\/\|*\|\~\|\^\)/
 syntax keyword jsBooleanTrue    true
 syntax keyword jsBooleanFalse   false
-syntax match   jsModules        /import\|export/
+syntax keyword jsModules        import export contained
 syntax keyword jsModuleWords    default from as contained
 syntax keyword jsOf             of contained
 
-syntax region jsImportContainer      start="import \?" end="$" contains=jsModuleWords,jsModules,jsComment,jsStringS,jsStringD,jsTemplateString
+syntax region jsImportContainer      start="^\s\?import \?" end="$" contains=jsModules,jsModuleWords,jsComment,jsStringS,jsStringD,jsTemplateString
 
-syntax region jsExportContainer      start="export \?" end="$" contains=jsModuleWords,jsModules,jsComment,jsTemplateString,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsClass,jsStorageClass,jsPrototype,jsBuiltins,jsNoise,jsAssignmentExpr
+syntax region jsExportContainer      start="^\s\?export \?" end="$" contains=jsModules,jsModuleWords,jsComment,jsTemplateString,jsStringD,jsStringS,jsRegexpString,jsNumber,jsFloat,jsThis,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsDotNotation,jsBracket,jsParen,jsFuncCall,jsUndefined,jsNan,jsKeyword,jsClass,jsStorageClass,jsPrototype,jsBuiltins,jsNoise,jsAssignmentExpr
 
 "" JavaScript comments
 syntax keyword jsCommentTodo    TODO FIXME XXX TBD contained