Magento 2: Custom price-options

Question

I want to change price-options on custom options price to per character.

example: Custom Options price set to $20 and max character is 10. If total character is 5, Custom Options price will be calculate ($20 * 5).

Answer 1

I've solutions for my question. I'm using jquery keyup(), and use basePrice for price calculation.

this.options.optionConfig[optId].prices.basePrice.amount