What has bugged me a lot with JavaScript that it lacked standard presentation of dates and decimals (like money), making it feel inferior for application develo

What has bugged me a lot with JavaScript that it lacked standard presentation of dates and decimals (like money), making it feel inferior for application development. Happy to finally seeing this addressed on both JavaScript tself and then also in serialisation formats. (Though looks like Ion is not solely targeting JS, but I make an assumption it is nice to consume Ion data in frontend)