How to set map size in Google Maps API v3?

I create a map in a div with 'display: none'. With google maps v2 I 开发者_开发知识库could set the 'size' parameter to the size of the div once shown, but this 'size' option disappeared in v3 of the API.

How can I do that?

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Change the size of the div using any method you want, and then call google.maps.event.trigger(map, 'resize'). A related question is here.