Add Safari compatibility

[joker314]

If a browser supports an HTML date input type, then the selected date will be presented to JS in the form YYYY-MM-DD. Safari does not have this UI, so instead the user is prompted to enter the date in that exact same format.

However, YYYY-MM-DD is not a format that the JavaScript Date constructor recognises in Safari (see Invalid Date in Safari on StackOverflow).

Before passing the date (whether it came from the user or the UI) to the Date constructor, this PR replaces all - symbols with / symbols. This is a format that Safari apparently recognises.

I have tested on Chrome to make sure it continues to work - I expect most modern browsers should support YYYY/MM/DD format.

Future work is to add validation to make sure that user inputs -- especially date inputs on Safari -- are actually valid dates. Part of that will be better error handling that will let the user know something went wrong. This is just a quick fix for Safari users but also any other browsers that don't support YYYY-MM-DD dates even if they do support the date picker UI.

[nightwatchcyber]

Kind of wondering if there is a standard JS date library we can use

[joker314]

Yeah, here are a few we may want to consider

• DateJS
• MomentJS
• jQuery's date picker (to show a calendar widget)