Add new button same as "Add to Cart" by setting the product price as 0 on product detail page

[TarasDiakiv]

I am going to implement the new feature.

I want to add the new button on product detail page same as "Add To Cart" button by setting the product price as 0.

It's for free order sample.
I want to customize that button with cart/add.js.

Could you please help me?

Thank you.

[Sweet_Savior_3]

Hello @TarasDiakiv 

This can be done by the with the liquid code with the custom.

[TarasDiakiv]

Thanks for your response.
Could you please provide custom code and where I should add them?