So recently, I have been designing a website. Part of it requires a user to click a button, in which case 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)?

CodePudding user response：

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:

1. on outlook page, open console and run: navigator.registerProtocolHandler("mailto","https://outlook.office365.com/mail/deeplink/compose/?mailtouri=%s","Outlook");
2. click allow on popup
3. mailto event should now prepopulate a new email on the outlook webapp