How to use tuple and uint with none value in stacks.js transaction?

[llwinner]

I want to call a contract function with stacks.js, and the functions args contain tuple and uint. I read the README file about how to call a contract, that example just use bufferCVFromString function, and the parameter is not empty.
The contract function I want to call has 5 parameters, some tuple or uint parameter's value can be none, but I don't know how to do with stacks.js.
Please help me, thanks!

[friedger]

You can use nonceCV() https://stacks.js.org/functions/_stacks_transactions.noneCV-1

There is also someCV(...) when using uints and tuples with parameters of type optional.

[llwinner]

@friedger Thanks for your reply. It helps me!