So recently I have been designing a website. Part of it requires a user to click a button that opens up Outlook (the app) with the email filled in. However, those people who don't have Outlook (or any other mailing app) can't use this. So I am wondering if there is a way to open the same email using the online email apps (eg outlook.com)?
If you're using mailto event, it just opens the default email app. You could set the outlook webapp as default, although it's not very user friendly IMO:
navigator.registerProtocolHandler("mailto","https://outlook.office365.com/mail/deeplink/compose/?mailtouri=%s","Outlook");