html - IE 中的 __src__ 是什么意思？

Question

我碰巧遇到了 IE 的谷歌代码。

<IMG style="POSITION: absolute; WIDTH: 616px; HEIGHT: 616px; TOP: 0px; LEFT: -154px" src="https://cbks0.googleapis.com/cbk?output=tile&amp;cb_client=apiv3&amp;v=4&amp;zoom=2&amp;x=2&amp;y=0&amp;panoid=AmKl8CauDW9s1OBl6hpC3Q&amp;fover=2&amp;onerr=3" __src__="https://cbks0.googleapis.com/cbk?output=tile&amp;cb_client=apiv3&amp;v=4&amp;zoom=2&amp;x=2&amp;y=0&amp;panoid=AmKl8CauDW9s1OBl6hpC3Q&amp;fover=2&amp;onerr=3" __gm_ticket__="1" gm_id="null" mb="false">

它包含我不知道的标签，例如，，__src__..有人知道它们是什么吗？gm_id__gm_ticket__

Answer 1

The double underscore is a naming convention which means the values of src or gm_ticket should not be edited by the user. This is more efficient than wrapping each global function in a closure. Closures can be very memory hungry since every instance needs its own function to encapsulate the local vars.

References

• Trying to be Private in JavaScript
• Google Maps API