从HTMLElement获取google.maps.Map实例 [英] Get google.maps.Map instance from a HTMLElement

问题描述

我在页面上有现有的地图。我可以使用document.getElementById（）的行来选择该元素以获取HTMLElement JavaScript对象。是否有可能获得地图初始化时创建的google.maps.Map实例，也就是说，它是HTMLElement对象的属性还是原型？

解决方案

您无法从 DOM元素获取 google.maps.Map 对象，在其上构建Google地图对象。 google.maps.Map 只是一个包装，它控制 DOM元素查看地图，而且该元素不包含引用它的包装器。

如果您的问题只是范围，请将 map 作为窗口对象，并且可以从您网页的任何地方访问它。您可以使用以下其中一种将'map'设置为全局：

  window.map = new google.maps.Map（..）
  

或

  map = new google.maps.Map（...）// AVOID'var'
  

I have an existing map on a page. I can select that element using something along the lines of document.getElementById() to get the HTMLElement javascript object. Is it possible to get the instance of google.maps.Map created when the map is initialised, i.e. is it a property of the HTMLElement object or in its prototype?

解决方案

You can't get google.maps.Map object from DOM Element ,on which Google Maps object have been constructed. google.maps.Map is just a wrapper, which controls DOM Element for viewing the map, and that element does not have reference to its wrapper.

If your problem is only the scope, make map as a property of window object, and it will be accessible from everywhere in your page. You can make 'map' as global by using one of these:

 window.map = new google.maps.Map(..) 

or

 map = new google.maps.Map(...) //AVOID 'var' 

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