Unexpected use of 'isNaN'. (eslintno-restricted-globals), Argument of type 'string' is not assignable to parameter of type 'number'. ts(2345)2020. 8. 12.
let val = '123'
isNaN(val) // nah! Argument of type 'string' is not assignable to parameter of type 'number'. ts(2345)
isNaN(123) // nah! Unexpected use of 'isNaN'. (eslintno-restricted-globals)let val = '123'
isNaN(val) // nah! Argument of type 'string' is not assignable to parameter of type 'number'. ts(2345)
isNaN(123) // nah! Unexpected use of 'isNaN'. (eslintno-restricted-globals)then use
Number.isNaN(val) // yay!Number.isNaN(val) // yay!