如何检查 Google Maps API 是否已加载? [英] How to check if Google Maps API is loaded?

问题描述

如何检查是否加载了 Google Maps API (v3)?

How to check if Google Maps API (v3) is loaded?

如果 API 由于互联网连接问题(网页在本地托管)而未加载，我不想执行映射脚本.

I do not want to execute mapping scripts if the API did not load due to internet connectivity problems (web page is hosted locally).

推荐答案

if (google.maps) {...} 如果 google 未定义(即如果 API未加载).

if (google.maps) {...} will give you a reference error if google is undefined (i.e. if the API didn't load).

相反，使用 if (typeof google === 'object' && typeof google.maps === 'object') {...} 来检查它是否加载成功.

Instead, use if (typeof google === 'object' && typeof google.maps === 'object') {...} to check if it loaded successfully.

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