Create a confirmation question that resolves to a true or false based on user input. It takes an undefined, true, or false value as the default value. Each of the default value types has an effect on how the prompt looks like.

• undefined will suffix the prompt with [y/n]
• true will suffix the prompt with [Y/n]
• false will suffix the prompt with [y/N]

The only valid values are anything starting with y or n uppercase or lowercase. The y and n is derived from the positive and negative labels. You can customize the labels in the options object The prompt can be canceled and will then return undefined.

Controls:

• Ctrl+c will have the question canceled and return undefined.
• Ctrl+d will exit the whole script no questions asked with a Deno.exit().
• Up arrow or Home key will move the cursor to the start of the prompt text.
• Down arrow or End key will move the cursor to the end of the prompt text.
• Left arrow will move the cursor one step to the left once if able.
• Right arrow will move the cursor one step to the right once if able.
• Enter will return the parsed result of the text.

Requires --unstable until Deno version 1.27.