removes double !!

[abiodun0]

!!(arr.filter((item) => item.property === prop)[0].html)
this is far easier to read
arr.filter((item) => item.property === prop)[0].html

[thechinedu]

I'm just casting the value returned to it's boolean equivalent. The tests are failing by the way.

[abiodun0]

Yup. The reason why the tests are failing were because you were checking for truthy value in essence you should be checking for defined or undefined. which is equivalent as in your use case
if it's defined it will always return true. if it's not it will return false anyways..

It's clean I just feel being more explicit and readability wins here.
Besides isn't this a use case for array.some? 👯