設置一個參數值為Function Js

Question

問題 => 我想增加參數容量的值，但我還想將參數命名為默認值

function Js(name = 'Mango' , capacity = 40){
console.log(`${name} with a capacity ${capacity} will be delivered !!!`)
}
Js() // .... Correct
Js("Something" , 40) // .... Also Correct

但是如果我只想給容量賦值並設置名稱默認值怎么辦

像這樣=>

Js(..., 55) // Mango with a capacity 55 will be delivered !!!

Answer 1

將默認參數放在第二位。

function Js(capacity, name= 'Mango'){
console.log(`${name} with a capacity ${capacity} will be delivered !!!`)
}
Js(40) //"Mango with a capacity 40 will be delivered !!!"
Js(40, 'Something else') // "Something else with a capacity 40 will be delivered !!!"