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如何检查 window.external 上是否存在函数?
我正在从 javascript 调用 C# 代码,并且我想检查 C# 对象中是否存在方法。
我找到了方法,只需像这样使用“in”运算符:
if ('FunctionName' in window.external){ window.external.FunctionName(...); }