Nodejs sent a CAPTCHA to the front end, how to store it? Because the front end needs to come back with this verification code for verification.

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now there is a CAPTCHA sent, and then the client requests to come back, compare it, and then determine whether it is successful or not. But I don"t know where to store this CAPTCHA! Please give me some advice

Node.js nodejs-express javascript

Mar.13,2021

suggest learning how to get started with database

find

well cache key/value

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