> delete map;
> inside the click function that closes the modal doesnt seem to work.

What were you expecting it to do?  Destroying the javascript object
won't necessarily un-render the map from screen.  Shouldn't matter if
you are hiding its div anyway.


> Even if i dont incude "var" while declaring map to make it global.

That on its own may not make it global, if you do not 'var' it in
global scope

<script ... >

  var map ;   // not inside of any function at all.

  function blah () {
      map = whatever( some parms)  ;   // give the existing map object
some values
   }

That would ensure 'map' is global in scope.

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