Hi everyone, I'm trying to catch an exception on K...

# javascript

[Franco]

Hi everyone, I'm trying to catch an exception on Kotlin/JS but it's not working for some reason. This is my code:

try {
    val dateStr = date?.toIsoString(dateOnly = true)

    ...
} catch (e: Exception) {
    logError("Failed to parse date", cause = e)
}

public fun Date.toIsoString(dateOnly: Boolean = false): String {
    val timezoneOffset = getTimezoneOffset()
    val dateStr = Date(getTime() - (timezoneOffset * 60_000)).toISOString()

    return if (dateOnly) dateStr.split("T")[0] else dateStr
}

And this is the error I get:

Uncaught RangeError: Invalid time value
    at Date.toISOString (<anonymous>)

Any idea if I'm doing something wrong or if this error just can't be catched for whatever reason?

[Franco]

This happens when I call toISOString() with an invalid date, which sometimes happens when people are entering the date manually on my web app

[turansky]

Possibly you need catch Throwable or even Error

[Franco]

I had tried Error and that didn't work either @turansky, however I tried Throwable now and that did work, thanks 🙂

[turansky]

https://twitter.com/relizarov/status/1299248297849303040?s=19

[hallvard]

Coming in a month later: I was looking for a function to get the locale date from a string − and found it lacks from the date library (in a jvm environment, I leave this to a DateFormatter object). Striving to understand how to use the LocaleOptions object, I did a search in this JS slack channel and came across your code snippet here. Thanks a lot, that saves my day!

[Franco]

I'm glad it helped @hallvard 🙂