问题
Is Google reCaptcha v2 supported in Internet Explorer 8?
If not is there any suitable Internet Explorer 8 compatible captchas?
I am seeing a issue where the reCaptcha code is trying to use the method getContext.
Object doesn't support property or method 'getContext'
回答1:
The code I ended up using to support IE8 was the following.
<!--[if !IE 8]><!--><script src="https://www.google.com/recaptcha/api.js"></script><!--<![endif]-->
<!--[if IE 8]><script src="https://www.google.com/recaptcha/api.js?fallback=true"></script><![endif]-->
The difference being fallback=true is set which reverts back to V1 of recaptcha.
来源：https://stackoverflow.com/questions/30808572/google-recaptcha-ie8