js check if float code example

Example 1: js check if string is number

isNaN(num)         // returns true if the variable does NOT contain a valid number

isNaN(123)         // false
isNaN('123')       // false
isNaN('1e10000')   // false (This translates to Infinity, which is a number)
isNaN('foo')       // true
isNaN('10px')      // true

Example 2: verify if number is not floating

let number = 2.4
Number.isInteger(number) // false

let number2 = 2
Number.isInteger(number2) // true

Example 3: check if date equal js

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   startRefreshTokenWatcher: sharedTypes.REFRESH_TOKEN_WATCHER,
   stopRefreshTokenWatcher: sharedTypes.STOP_REFRESH_TOKEN_WATCHER
})