The potential issue of undefined objects in TypeScript when utilizing computed properties in Vue3

https://i.sstatic.net/I5ZVO.png

I've attempted adding a ? after each word and also experimented with the following code:

const totalNameLenght = computed(() => {
      if (userFirstnameLenght.value && userLastnameLenght.value){
        return userFirstnameLenght.value + userLastnameLenght.value
    }
  })

I have even considered this alternative approach:

const totalNameLenght = computed((): number | undefined => )

I'm feeling stuck and unsure of how to proceed... any suggestions on solving this issue? Thank you in advance!

Answer №1

Here is a solution you may attempt:

    const totalNameLength = computed(() => {
            return Number(userFirstnameLenght?.value ?? 0) + Number(userLastnameLenght?.value ?? 0)
      })

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